/*
 * #%L
 * HAPI FHIR JPA - Search Parameters
 * %%
 * Copyright (C) 2014 - 2024 Smile CDR, Inc.
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */
package ca.uhn.fhir.jpa.searchparam.extractor;

import ca.uhn.fhir.context.BaseRuntimeChildDefinition;
import ca.uhn.fhir.context.BaseRuntimeElementCompositeDefinition;
import ca.uhn.fhir.context.BaseRuntimeElementDefinition;
import ca.uhn.fhir.context.ComboSearchParamType;
import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.context.FhirVersionEnum;
import ca.uhn.fhir.context.RuntimeResourceDefinition;
import ca.uhn.fhir.context.RuntimeSearchParam;
import ca.uhn.fhir.i18n.Msg;
import ca.uhn.fhir.jpa.model.config.PartitionSettings;
import ca.uhn.fhir.jpa.model.entity.StorageSettings;
import ca.uhn.fhir.jpa.model.entity.*;
import ca.uhn.fhir.jpa.model.util.UcumServiceUtil;
import ca.uhn.fhir.jpa.searchparam.SearchParamConstants;
import ca.uhn.fhir.jpa.searchparam.util.JpaParamUtil;
import ca.uhn.fhir.jpa.searchparam.util.RuntimeSearchParamHelper;
import ca.uhn.fhir.model.api.IQueryParameterType;
import ca.uhn.fhir.model.primitive.BoundCodeDt;
import ca.uhn.fhir.rest.api.Constants;
import ca.uhn.fhir.rest.api.RestSearchParameterTypeEnum;
import ca.uhn.fhir.rest.server.exceptions.InternalErrorException;
import ca.uhn.fhir.rest.server.util.ISearchParamRegistry;
import ca.uhn.fhir.util.FhirTerser;
import ca.uhn.fhir.util.HapiExtensions;
import ca.uhn.fhir.util.StringUtil;
import ca.uhn.fhir.util.UrlUtil;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.Sets;
import jakarta.annotation.Nonnull;
import jakarta.annotation.Nullable;
import jakarta.annotation.PostConstruct;
import org.apache.commons.lang3.ObjectUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.Validate;
import org.apache.commons.text.StringTokenizer;
import org.fhir.ucum.Pair;
import org.hl7.fhir.exceptions.FHIRException;
import org.hl7.fhir.instance.model.api.IBase;
import org.hl7.fhir.instance.model.api.IBaseEnumeration;
import org.hl7.fhir.instance.model.api.IBaseExtension;
import org.hl7.fhir.instance.model.api.IBaseReference;
import org.hl7.fhir.instance.model.api.IBaseResource;
import org.hl7.fhir.instance.model.api.IIdType;
import org.hl7.fhir.instance.model.api.IPrimitiveType;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import java.util.TreeSet;
import java.util.stream.Collectors;
import javax.measure.quantity.Quantity;
import javax.measure.unit.NonSI;
import javax.measure.unit.Unit;

import static ca.uhn.fhir.rest.api.RestSearchParameterTypeEnum.DATE;
import static ca.uhn.fhir.rest.api.RestSearchParameterTypeEnum.REFERENCE;
import static org.apache.commons.lang3.StringUtils.isBlank;
import static org.apache.commons.lang3.StringUtils.isNotBlank;
import static org.apache.commons.lang3.StringUtils.trim;

public abstract class BaseSearchParamExtractor implements ISearchParamExtractor {

        public static final Set<String> COORDS_INDEX_PATHS;
        private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(BaseSearchParamExtractor.class);

        static {
                Set<String> coordsIndexPaths = Sets.newHashSet("Location.position");
                COORDS_INDEX_PATHS = Collections.unmodifiableSet(coordsIndexPaths);
        }

        @Autowired
        protected ApplicationContext myApplicationContext;

        @Autowired
        private FhirContext myContext;

        @Autowired
        private ISearchParamRegistry mySearchParamRegistry;

        @Autowired
        private StorageSettings myStorageSettings;

        @Autowired
        private PartitionSettings myPartitionSettings;

        private Set<String> myIgnoredForSearchDatatypes;
        private BaseRuntimeChildDefinition myQuantityValueValueChild;
        private BaseRuntimeChildDefinition myQuantitySystemValueChild;
        private BaseRuntimeChildDefinition myQuantityCodeValueChild;
        private BaseRuntimeChildDefinition myMoneyValueChild;
        private BaseRuntimeChildDefinition myMoneyCurrencyChild;
        private BaseRuntimeElementCompositeDefinition<?> myLocationPositionDefinition;
        private BaseRuntimeChildDefinition myCodeSystemUrlValueChild;
        private BaseRuntimeChildDefinition myRangeLowValueChild;
        private BaseRuntimeChildDefinition myRangeHighValueChild;
        private BaseRuntimeChildDefinition myAddressLineValueChild;
        private BaseRuntimeChildDefinition myAddressCityValueChild;
        private BaseRuntimeChildDefinition myAddressDistrictValueChild;
        private BaseRuntimeChildDefinition myAddressStateValueChild;
        private BaseRuntimeChildDefinition myAddressCountryValueChild;
        private BaseRuntimeChildDefinition myAddressPostalCodeValueChild;
        private BaseRuntimeChildDefinition myCapabilityStatementRestSecurityServiceValueChild;
        private BaseRuntimeChildDefinition myPeriodStartValueChild;
        private BaseRuntimeChildDefinition myPeriodEndValueChild;
        private BaseRuntimeChildDefinition myTimingEventValueChild;
        private BaseRuntimeChildDefinition myTimingRepeatValueChild;
        private BaseRuntimeChildDefinition myTimingRepeatBoundsValueChild;
        private BaseRuntimeChildDefinition myDurationSystemValueChild;
        private BaseRuntimeChildDefinition myDurationCodeValueChild;
        private BaseRuntimeChildDefinition myDurationValueValueChild;
        private BaseRuntimeChildDefinition myHumanNameFamilyValueChild;
        private BaseRuntimeChildDefinition myHumanNameGivenValueChild;
        private BaseRuntimeChildDefinition myHumanNameTextValueChild;
        private BaseRuntimeChildDefinition myHumanNamePrefixValueChild;
        private BaseRuntimeChildDefinition myHumanNameSuffixValueChild;
        private BaseRuntimeChildDefinition myContactPointValueValueChild;
        private BaseRuntimeChildDefinition myIdentifierSystemValueChild;
        private BaseRuntimeChildDefinition myIdentifierValueValueChild;
        private BaseRuntimeChildDefinition myIdentifierTypeValueChild;
        private BaseRuntimeChildDefinition myIdentifierTypeTextValueChild;
        private BaseRuntimeChildDefinition myCodeableConceptCodingValueChild;
        private BaseRuntimeChildDefinition myCodeableConceptTextValueChild;
        private BaseRuntimeChildDefinition myCodingSystemValueChild;
        private BaseRuntimeChildDefinition myCodingCodeValueChild;
        private BaseRuntimeChildDefinition myCodingDisplayValueChild;
        private BaseRuntimeChildDefinition myContactPointSystemValueChild;
        private BaseRuntimeChildDefinition myPatientCommunicationLanguageValueChild;
        private BaseRuntimeChildDefinition myCodeableReferenceConcept;
        private BaseRuntimeChildDefinition myCodeableReferenceReference;

        /**
         * Constructor
         */
        BaseSearchParamExtractor() {
                super();
        }

        /**
         * UNIT TEST constructor
         */
        BaseSearchParamExtractor(
                        StorageSettings theStorageSettings,
                        PartitionSettings thePartitionSettings,
                        FhirContext theCtx,
                        ISearchParamRegistry theSearchParamRegistry) {
                Validate.notNull(theStorageSettings);
                Validate.notNull(theCtx);
                Validate.notNull(theSearchParamRegistry);

                myStorageSettings = theStorageSettings;
                myContext = theCtx;
                mySearchParamRegistry = theSearchParamRegistry;
                myPartitionSettings = thePartitionSettings;
        }

        @Override
        public SearchParamSet<PathAndRef> extractResourceLinks(IBaseResource theResource, boolean theWantLocalReferences) {
                IExtractor<PathAndRef> extractor = createReferenceExtractor();
                return extractSearchParams(
                                theResource,
                                extractor,
                                RestSearchParameterTypeEnum.REFERENCE,
                                theWantLocalReferences,
                                ISearchParamExtractor.ALL_PARAMS);
        }

        private IExtractor<PathAndRef> createReferenceExtractor() {
                return new ResourceLinkExtractor();
        }

        @Override
        public PathAndRef extractReferenceLinkFromResource(IBase theValue, String thePath) {
                ResourceLinkExtractor extractor = new ResourceLinkExtractor();
                return extractor.get(theValue, thePath);
        }

        @Override
        public List<String> extractParamValuesAsStrings(RuntimeSearchParam theSearchParam, IBaseResource theResource) {
                IExtractor extractor = createExtractor(theSearchParam, theResource);

                if (theSearchParam.getParamType().equals(REFERENCE)) {
                        return extractReferenceParamsAsQueryTokens(theSearchParam, theResource, extractor);
                } else {
                        return extractParamsAsQueryTokens(theSearchParam, theResource, extractor);
                }
        }

        @Nonnull
        private IExtractor createExtractor(RuntimeSearchParam theSearchParam, IBaseResource theResource) {
                IExtractor extractor;
                switch (theSearchParam.getParamType()) {
                        case DATE:
                                extractor = createDateExtractor(theResource);
                                break;
                        case STRING:
                                extractor = createStringExtractor(theResource);
                                break;
                        case TOKEN:
                                extractor = createTokenExtractor(theResource);
                                break;
                        case NUMBER:
                                extractor = createNumberExtractor(theResource);
                                break;
                        case REFERENCE:
                                extractor = createReferenceExtractor();
                                break;
                        case QUANTITY:
                                extractor = createQuantityExtractor(theResource);
                                break;
                        case URI:
                                extractor = createUriExtractor(theResource);
                                break;
                        case SPECIAL:
                                extractor = createSpecialExtractor(theResource.getIdElement().getResourceType());
                                break;
                        case COMPOSITE:
                        case HAS:
                        default:
                                throw new UnsupportedOperationException(
                                                Msg.code(503) + "Type " + theSearchParam.getParamType() + " not supported for extraction");
                }
                return extractor;
        }

        private List<String> extractReferenceParamsAsQueryTokens(
                        RuntimeSearchParam theSearchParam, IBaseResource theResource, IExtractor<PathAndRef> theExtractor) {
                SearchParamSet<PathAndRef> params = new SearchParamSet<>();
                extractSearchParam(theSearchParam, theResource, theExtractor, params, false);
                return refsToStringList(params);
        }

        private List<String> refsToStringList(SearchParamSet<PathAndRef> theParams) {
                return theParams.stream()
                                .map(PathAndRef::getRef)
                                .map(ref -> ref.getReferenceElement().toUnqualifiedVersionless().getValue())
                                .collect(Collectors.toList());
        }

        private <T extends BaseResourceIndexedSearchParam> List<String> extractParamsAsQueryTokens(
                        RuntimeSearchParam theSearchParam, IBaseResource theResource, IExtractor<T> theExtractor) {
                SearchParamSet<T> params = new SearchParamSet<>();
                extractSearchParam(theSearchParam, theResource, theExtractor, params, false);
                return toStringList(params);
        }

        private <T extends BaseResourceIndexedSearchParam> List<String> toStringList(SearchParamSet<T> theParams) {
                return theParams.stream()
                                .map(param -> param.toQueryParameterType().getValueAsQueryToken(myContext))
                                .collect(Collectors.toList());
        }

        @Override
        public SearchParamSet<ResourceIndexedSearchParamComposite> extractSearchParamComposites(
                        IBaseResource theResource, ISearchParamFilter theSearchParamFilter) {
                IExtractor<ResourceIndexedSearchParamComposite> extractor = createCompositeExtractor(theResource);
                return extractSearchParams(
                                theResource, extractor, RestSearchParameterTypeEnum.COMPOSITE, false, theSearchParamFilter);
        }

        private IExtractor<ResourceIndexedSearchParamComposite> createCompositeExtractor(IBaseResource theResource) {
                return new CompositeExtractor(theResource);
        }

        /**
         * Extractor for composite SPs.
         * Extracts elements, and then recurses and applies extractors for each component SP using the element as the new root.
         */
        public class CompositeExtractor implements IExtractor<ResourceIndexedSearchParamComposite> {
                final IBaseResource myResource;
                final String myResourceType;

                public CompositeExtractor(IBaseResource theResource) {
                        myResource = theResource;
                        myResourceType = toRootTypeName(theResource);
                }

                /**
                 * Extract the subcomponent index data for each component of a composite SP from an IBase element.
                 *
                 * @param theParams               will add 1 or 0 ResourceIndexedSearchParamComposite instances for theValue
                 * @param theCompositeSearchParam the composite SP
                 * @param theValue                the focus element for the subcomponent extraction
                 * @param thePath                 unused api param
                 * @param theWantLocalReferences  passed down to reference extraction
                 */
                @Override
                public void extract(
                                SearchParamSet<ResourceIndexedSearchParamComposite> theParams,
                                RuntimeSearchParam theCompositeSearchParam,
                                IBase theValue,
                                String thePath,
                                boolean theWantLocalReferences) {

                        // skip broken SPs
                        if (!isExtractableComposite(theCompositeSearchParam)) {
                                ourLog.info(
                                                "CompositeExtractor - skipping unsupported search parameter {}",
                                                theCompositeSearchParam.getName());
                                return;
                        }

                        String compositeSpName = theCompositeSearchParam.getName();
                        ourLog.trace("CompositeExtractor - extracting {} {}", compositeSpName, theValue);
                        ResourceIndexedSearchParamComposite e = new ResourceIndexedSearchParamComposite(compositeSpName, thePath);

                        // extract the index data for each component.
                        for (RuntimeSearchParam.Component component : theCompositeSearchParam.getComponents()) {
                                String componentSpRef = component.getReference();
                                String expression = component.getExpression();

                                RuntimeSearchParam componentSp = mySearchParamRegistry.getActiveSearchParamByUrl(componentSpRef);
                                Validate.notNull(
                                                componentSp,
                                                "Misconfigured SP %s - failed to load component %s",
                                                compositeSpName,
                                                componentSpRef);

                                SearchParamSet<BaseResourceIndexedSearchParam> componentIndexedSearchParams =
                                                extractCompositeComponentIndexData(
                                                                theValue, componentSp, expression, theWantLocalReferences, theCompositeSearchParam);
                                if (componentIndexedSearchParams.isEmpty()) {
                                        // If any of the components are empty, no search can ever match.  Short circuit, and bail out.
                                        return;
                                } else {
                                        e.addComponentIndexedSearchParams(componentSp, componentIndexedSearchParams);
                                }
                        }

                        // every component has data.  Add it for indexing.
                        theParams.add(e);
                }

                /**
                 * Extract the subcomponent index data for a single component of a composite SP.
                 *
                 * @param theFocusElement         the element to use as the root for sub-extraction
                 * @param theComponentSearchParam the active subcomponent SP for extraction
                 * @param theSubPathExpression    the sub-expression to extract values from theFocusElement
                 * @param theWantLocalReferences  flag for URI processing
                 * @param theCompositeSearchParam the parent composite SP
                 * @return the extracted index beans for theFocusElement
                 */
                @Nonnull
                private SearchParamSet<BaseResourceIndexedSearchParam> extractCompositeComponentIndexData(
                                IBase theFocusElement,
                                RuntimeSearchParam theComponentSearchParam,
                                String theSubPathExpression,
                                boolean theWantLocalReferences,
                                RuntimeSearchParam theCompositeSearchParam) {
                        IExtractor componentExtractor = createExtractor(theComponentSearchParam, myResource);
                        SearchParamSet<BaseResourceIndexedSearchParam> componentIndexData = new SearchParamSet<>();

                        extractSearchParam(
                                        theComponentSearchParam,
                                        theSubPathExpression,
                                        theFocusElement,
                                        componentExtractor,
                                        componentIndexData,
                                        theWantLocalReferences);
                        ourLog.trace(
                                        "CompositeExtractor - extracted {} index values for {}",
                                        componentIndexData.size(),
                                        theComponentSearchParam.getName());

                        return componentIndexData;
                }

                /**
                 * Is this an extractable composite SP?
                 *
                 * @param theSearchParam of type composite
                 * @return can we extract useful index data from this?
                 */
                private boolean isExtractableComposite(RuntimeSearchParam theSearchParam) {
                        // this is a composite SP
                        return RestSearchParameterTypeEnum.COMPOSITE.equals(theSearchParam.getParamType())
                                        && theSearchParam.getComponents().stream().noneMatch(this::isNotExtractableCompositeComponent);
                }

                private boolean isNotExtractableCompositeComponent(RuntimeSearchParam.Component c) {
                        RuntimeSearchParam componentSearchParam = mySearchParamRegistry.getActiveSearchParamByUrl(c.getReference());
                        return // Does the sub-param link work?
                        componentSearchParam == null
                                        ||
                                        // Is this the right type?
                                        RestSearchParameterTypeEnum.COMPOSITE.equals(componentSearchParam.getParamType())
                                        ||

                                        // Bug workaround: the component expressions are null in the FhirContextSearchParamRegistry. We
                                        // can't do anything with them.
                                        c.getExpression() == null
                                        ||

                                        // TODO mb Bug workaround: we don't support the %resource variable, but standard SPs on
                                        // MolecularSequence use it.
                                        // Skip them for now.
                                        c.getExpression().contains("%resource");
                }
        }

        @Override
        public SearchParamSet<ResourceIndexedComboStringUnique> extractSearchParamComboUnique(
                        String theResourceType, ResourceIndexedSearchParams theParams) {
                SearchParamSet<ResourceIndexedComboStringUnique> retVal = new SearchParamSet<>();
                List<RuntimeSearchParam> runtimeComboUniqueParams =
                                mySearchParamRegistry.getActiveComboSearchParams(theResourceType, ComboSearchParamType.UNIQUE);

                for (RuntimeSearchParam runtimeParam : runtimeComboUniqueParams) {
                        Set<ResourceIndexedComboStringUnique> comboUniqueParams =
                                        createComboUniqueParam(theResourceType, theParams, runtimeParam);
                        retVal.addAll(comboUniqueParams);
                }
                return retVal;
        }

        private SearchParamSet<ResourceIndexedComboStringUnique> createComboUniqueParam(
                        String theResourceType, ResourceIndexedSearchParams theParams, RuntimeSearchParam theRuntimeParam) {
                SearchParamSet<ResourceIndexedComboStringUnique> retVal = new SearchParamSet<>();
                Set<String> queryStringsToPopulate =
                                extractParameterCombinationsForComboParam(theParams, theResourceType, theRuntimeParam);

                for (String nextQueryString : queryStringsToPopulate) {
                        ourLog.trace(
                                        "Adding composite unique SP: {} on {} for {}",
                                        nextQueryString,
                                        theResourceType,
                                        theRuntimeParam.getId());
                        ResourceIndexedComboStringUnique uniqueParam = new ResourceIndexedComboStringUnique();
                        uniqueParam.setIndexString(nextQueryString);
                        uniqueParam.setSearchParameterId(theRuntimeParam.getId());
                        retVal.add(uniqueParam);
                }
                return retVal;
        }

        @Override
        public SearchParamSet<ResourceIndexedComboTokenNonUnique> extractSearchParamComboNonUnique(
                        String theResourceType, ResourceIndexedSearchParams theParams) {
                SearchParamSet<ResourceIndexedComboTokenNonUnique> retVal = new SearchParamSet<>();
                List<RuntimeSearchParam> runtimeComboNonUniqueParams =
                                mySearchParamRegistry.getActiveComboSearchParams(theResourceType, ComboSearchParamType.NON_UNIQUE);

                for (RuntimeSearchParam runtimeParam : runtimeComboNonUniqueParams) {
                        Set<ResourceIndexedComboTokenNonUnique> comboNonUniqueParams =
                                        createComboNonUniqueParam(theResourceType, theParams, runtimeParam);
                        retVal.addAll(comboNonUniqueParams);
                }
                return retVal;
        }

        private SearchParamSet<ResourceIndexedComboTokenNonUnique> createComboNonUniqueParam(
                        String theResourceType, ResourceIndexedSearchParams theParams, RuntimeSearchParam theRuntimeParam) {
                SearchParamSet<ResourceIndexedComboTokenNonUnique> retVal = new SearchParamSet<>();
                Set<String> queryStringsToPopulate =
                                extractParameterCombinationsForComboParam(theParams, theResourceType, theRuntimeParam);

                for (String nextQueryString : queryStringsToPopulate) {
                        ourLog.trace("Adding composite unique SP: {}", nextQueryString);
                        ResourceIndexedComboTokenNonUnique nonUniqueParam = new ResourceIndexedComboTokenNonUnique();
                        nonUniqueParam.setPartitionSettings(myPartitionSettings);
                        nonUniqueParam.setIndexString(nextQueryString);
                        nonUniqueParam.setSearchParameterId(theRuntimeParam.getId());
                        retVal.add(nonUniqueParam);
                }
                return retVal;
        }

        @Nonnull
        private Set<String> extractParameterCombinationsForComboParam(
                        ResourceIndexedSearchParams theParams, String theResourceType, RuntimeSearchParam theParam) {
                List<List<String>> partsChoices = new ArrayList<>();

                List<RuntimeSearchParam> compositeComponents =
                                JpaParamUtil.resolveComponentParameters(mySearchParamRegistry, theParam);
                for (RuntimeSearchParam nextCompositeOf : compositeComponents) {
                        Collection<? extends BaseResourceIndexedSearchParam> paramsListForCompositePart =
                                        findParameterIndexes(theParams, nextCompositeOf);

                        Collection<ResourceLink> linksForCompositePart = null;
                        switch (nextCompositeOf.getParamType()) {
                                case REFERENCE:
                                        linksForCompositePart = theParams.myLinks;
                                        break;
                                case NUMBER:
                                case DATE:
                                case STRING:
                                case TOKEN:
                                case QUANTITY:
                                case URI:
                                case SPECIAL:
                                case COMPOSITE:
                                case HAS:
                                        break;
                        }

                        Collection<String> linksForCompositePartWantPaths = null;
                        switch (nextCompositeOf.getParamType()) {
                                case REFERENCE:
                                        linksForCompositePartWantPaths = new HashSet<>(nextCompositeOf.getPathsSplit());
                                        break;
                                case NUMBER:
                                case DATE:
                                case STRING:
                                case TOKEN:
                                case QUANTITY:
                                case URI:
                                case SPECIAL:
                                case COMPOSITE:
                                case HAS:
                                        break;
                        }

                        ArrayList<String> nextChoicesList = new ArrayList<>();
                        partsChoices.add(nextChoicesList);

                        String key = UrlUtil.escapeUrlParam(nextCompositeOf.getName());
                        if (paramsListForCompositePart != null) {
                                for (BaseResourceIndexedSearchParam nextParam : paramsListForCompositePart) {
                                        IQueryParameterType nextParamAsClientParam = nextParam.toQueryParameterType();
                                        String value = nextParamAsClientParam.getValueAsQueryToken(myContext);

                                        RuntimeSearchParam param = mySearchParamRegistry.getActiveSearchParam(theResourceType, key);
                                        if (theParam.getComboSearchParamType() == ComboSearchParamType.NON_UNIQUE
                                                        && param != null
                                                        && param.getParamType() == RestSearchParameterTypeEnum.STRING) {
                                                value = StringUtil.normalizeStringForSearchIndexing(value);
                                        }

                                        if (isNotBlank(value)) {
                                                value = UrlUtil.escapeUrlParam(value);
                                                nextChoicesList.add(key + "=" + value);
                                        }
                                }
                        }
                        if (linksForCompositePart != null) {
                                for (ResourceLink nextLink : linksForCompositePart) {
                                        if (linksForCompositePartWantPaths.contains(nextLink.getSourcePath())) {
                                                assert isNotBlank(nextLink.getTargetResourceType());
                                                assert isNotBlank(nextLink.getTargetResourceId());
                                                String value = nextLink.getTargetResourceType() + "/" + nextLink.getTargetResourceId();
                                                if (isNotBlank(value)) {
                                                        value = UrlUtil.escapeUrlParam(value);
                                                        nextChoicesList.add(key + "=" + value);
                                                }
                                        }
                                }
                        }
                }

                return ResourceIndexedSearchParams.extractCompositeStringUniquesValueChains(theResourceType, partsChoices);
        }

        @Nullable
        private Collection<? extends BaseResourceIndexedSearchParam> findParameterIndexes(
                        ResourceIndexedSearchParams theParams, RuntimeSearchParam nextCompositeOf) {
                Collection<? extends BaseResourceIndexedSearchParam> paramsListForCompositePart = null;
                switch (nextCompositeOf.getParamType()) {
                        case NUMBER:
                                paramsListForCompositePart = theParams.myNumberParams;
                                break;
                        case DATE:
                                paramsListForCompositePart = theParams.myDateParams;
                                break;
                        case STRING:
                                paramsListForCompositePart = theParams.myStringParams;
                                break;
                        case TOKEN:
                                paramsListForCompositePart = theParams.myTokenParams;
                                break;
                        case QUANTITY:
                                paramsListForCompositePart = theParams.myQuantityParams;
                                break;
                        case URI:
                                paramsListForCompositePart = theParams.myUriParams;
                                break;
                        case REFERENCE:
                        case SPECIAL:
                        case COMPOSITE:
                        case HAS:
                                break;
                }
                if (paramsListForCompositePart != null) {
                        paramsListForCompositePart = paramsListForCompositePart.stream()
                                        .filter(t -> t.getParamName().equals(nextCompositeOf.getName()))
                                        .collect(Collectors.toList());
                }
                return paramsListForCompositePart;
        }

        @Override
        public SearchParamSet<BaseResourceIndexedSearchParam> extractSearchParamTokens(
                        IBaseResource theResource, ISearchParamFilter theSearchParamFilter) {
                IExtractor<BaseResourceIndexedSearchParam> extractor = createTokenExtractor(theResource);
                return extractSearchParams(
                                theResource, extractor, RestSearchParameterTypeEnum.TOKEN, false, theSearchParamFilter);
        }

        @Override
        public SearchParamSet<BaseResourceIndexedSearchParam> extractSearchParamTokens(
                        IBaseResource theResource, RuntimeSearchParam theSearchParam) {
                IExtractor<BaseResourceIndexedSearchParam> extractor = createTokenExtractor(theResource);
                SearchParamSet<BaseResourceIndexedSearchParam> setToPopulate = new SearchParamSet<>();
                extractSearchParam(theSearchParam, theResource, extractor, setToPopulate, false);
                return setToPopulate;
        }

        private IExtractor<BaseResourceIndexedSearchParam> createTokenExtractor(IBaseResource theResource) {
                String resourceTypeName = toRootTypeName(theResource);
                String useSystem;
                if (getContext().getVersion().getVersion().equals(FhirVersionEnum.DSTU2)) {
                        if (resourceTypeName.equals("ValueSet")) {
                                ca.uhn.fhir.model.dstu2.resource.ValueSet dstu2ValueSet =
                                                (ca.uhn.fhir.model.dstu2.resource.ValueSet) theResource;
                                useSystem = dstu2ValueSet.getCodeSystem().getSystem();
                        } else {
                                useSystem = null;
                        }
                } else {
                        if (resourceTypeName.equals("CodeSystem")) {
                                useSystem = extractValueAsString(myCodeSystemUrlValueChild, theResource);
                        } else {
                                useSystem = null;
                        }
                }

                return new TokenExtractor(resourceTypeName, useSystem);
        }

        @Override
        public SearchParamSet<BaseResourceIndexedSearchParam> extractSearchParamSpecial(
                        IBaseResource theResource, ISearchParamFilter theSearchParamFilter) {
                String resourceTypeName = toRootTypeName(theResource);
                IExtractor<BaseResourceIndexedSearchParam> extractor = createSpecialExtractor(resourceTypeName);
                return extractSearchParams(
                                theResource, extractor, RestSearchParameterTypeEnum.SPECIAL, false, theSearchParamFilter);
        }

        private IExtractor<BaseResourceIndexedSearchParam> createSpecialExtractor(String theResourceTypeName) {
                return (params, searchParam, value, path, theWantLocalReferences) -> {
                        if (COORDS_INDEX_PATHS.contains(path)) {
                                addCoords_Position(theResourceTypeName, params, searchParam, value);
                        }
                };
        }

        private void addUnexpectedDatatypeWarning(
                        SearchParamSet<?> theParams, RuntimeSearchParam theSearchParam, IBase theValue, String thePath) {
                String typeDesc = myContext.getElementDefinition(theValue.getClass()).getName();
                theParams.addWarning("Search param " + theSearchParam.getBase() + "#" + theSearchParam.getName()
                                + " is unable to index value of type " + typeDesc + " as a "
                                + theSearchParam.getParamType().name() + " at path: " + thePath);
        }

        @Override
        public SearchParamSet<ResourceIndexedSearchParamUri> extractSearchParamUri(
                        IBaseResource theResource, ISearchParamFilter theSearchParamFilter) {
                IExtractor<ResourceIndexedSearchParamUri> extractor = createUriExtractor(theResource);
                return extractSearchParams(
                                theResource, extractor, RestSearchParameterTypeEnum.URI, false, theSearchParamFilter);
        }

        private IExtractor<ResourceIndexedSearchParamUri> createUriExtractor(IBaseResource theResource) {
                return (params, searchParam, value, path, theWantLocalReferences) -> {
                        String nextType = toRootTypeName(value);
                        String resourceType = toRootTypeName(theResource);
                        switch (nextType) {
                                case "uri":
                                case "url":
                                case "oid":
                                case "sid":
                                case "uuid":
                                        addUri_Uri(resourceType, params, searchParam, value);
                                        break;
                                default:
                                        addUnexpectedDatatypeWarning(params, searchParam, value, path);
                                        break;
                        }
                };
        }

        @Override
        public SearchParamSet<ResourceIndexedSearchParamDate> extractSearchParamDates(
                        IBaseResource theResource, ISearchParamFilter theSearchParamFilter) {
                IExtractor<ResourceIndexedSearchParamDate> extractor = createDateExtractor(theResource);
                return extractSearchParams(theResource, extractor, DATE, false, theSearchParamFilter);
        }

        private IExtractor<ResourceIndexedSearchParamDate> createDateExtractor(IBaseResource theResource) {
                return new DateExtractor(theResource);
        }

        @Override
        public Date extractDateFromResource(IBase theValue, String thePath) {
                DateExtractor extractor = new DateExtractor("DateType");
                return extractor.get(theValue, thePath, false).getValueHigh();
        }

        @Override
        public SearchParamSet<ResourceIndexedSearchParamNumber> extractSearchParamNumber(
                        IBaseResource theResource, ISearchParamFilter theSearchParamFilter) {
                IExtractor<ResourceIndexedSearchParamNumber> extractor = createNumberExtractor(theResource);
                return extractSearchParams(
                                theResource, extractor, RestSearchParameterTypeEnum.NUMBER, false, theSearchParamFilter);
        }

        private IExtractor<ResourceIndexedSearchParamNumber> createNumberExtractor(IBaseResource theResource) {
                return (params, searchParam, value, path, theWantLocalReferences) -> {
                        String nextType = toRootTypeName(value);
                        String resourceType = toRootTypeName(theResource);
                        switch (nextType) {
                                case "Duration":
                                        addNumber_Duration(resourceType, params, searchParam, value);
                                        break;
                                case "Quantity":
                                        addNumber_Quantity(resourceType, params, searchParam, value);
                                        break;
                                case "integer":
                                case "positiveInt":
                                case "unsignedInt":
                                        addNumber_Integer(resourceType, params, searchParam, value);
                                        break;
                                case "decimal":
                                        addNumber_Decimal(resourceType, params, searchParam, value);
                                        break;
                                case "Range":
                                        addNumber_Range(resourceType, params, searchParam, value);
                                        break;
                                default:
                                        addUnexpectedDatatypeWarning(params, searchParam, value, path);
                                        break;
                        }
                };
        }

        @Override
        public SearchParamSet<ResourceIndexedSearchParamQuantity> extractSearchParamQuantity(
                        IBaseResource theResource, ISearchParamFilter theSearchParamFilter) {
                IExtractor<ResourceIndexedSearchParamQuantity> extractor = createQuantityUnnormalizedExtractor(theResource);
                return extractSearchParams(
                                theResource, extractor, RestSearchParameterTypeEnum.QUANTITY, false, theSearchParamFilter);
        }

        @Override
        public SearchParamSet<ResourceIndexedSearchParamQuantityNormalized> extractSearchParamQuantityNormalized(
                        IBaseResource theResource, ISearchParamFilter theSearchParamFilter) {
                IExtractor<ResourceIndexedSearchParamQuantityNormalized> extractor =
                                createQuantityNormalizedExtractor(theResource);
                return extractSearchParams(
                                theResource, extractor, RestSearchParameterTypeEnum.QUANTITY, false, theSearchParamFilter);
        }

        @Nonnull
        private IExtractor<? extends BaseResourceIndexedSearchParamQuantity> createQuantityExtractor(
                        IBaseResource theResource) {
                IExtractor<? extends BaseResourceIndexedSearchParamQuantity> result;
                if (myStorageSettings.getNormalizedQuantitySearchLevel().storageOrSearchSupported()) {
                        result = new MultiplexExtractor(
                                        createQuantityUnnormalizedExtractor(theResource), createQuantityNormalizedExtractor(theResource));
                } else {
                        result = createQuantityUnnormalizedExtractor(theResource);
                }
                return result;
        }

        @Nonnull
        private IExtractor<ResourceIndexedSearchParamQuantity> createQuantityUnnormalizedExtractor(
                        IBaseResource theResource) {
                String resourceType = toRootTypeName(theResource);
                return (params, searchParam, value, path, theWantLocalReferences) -> {
                        if (value.getClass().equals(myLocationPositionDefinition.getImplementingClass())) {
                                return;
                        }

                        String nextType = toRootTypeName(value);
                        switch (nextType) {
                                case "Quantity":
                                        addQuantity_Quantity(resourceType, params, searchParam, value);
                                        break;
                                case "Money":
                                        addQuantity_Money(resourceType, params, searchParam, value);
                                        break;
                                case "Range":
                                        addQuantity_Range(resourceType, params, searchParam, value);
                                        break;
                                default:
                                        addUnexpectedDatatypeWarning(params, searchParam, value, path);
                                        break;
                        }
                };
        }

        private IExtractor<ResourceIndexedSearchParamQuantityNormalized> createQuantityNormalizedExtractor(
                        IBaseResource theResource) {

                return (params, searchParam, value, path, theWantLocalReferences) -> {
                        if (value.getClass().equals(myLocationPositionDefinition.getImplementingClass())) {
                                return;
                        }

                        String nextType = toRootTypeName(value);
                        String resourceType = toRootTypeName(theResource);
                        switch (nextType) {
                                case "Quantity":
                                        addQuantity_QuantityNormalized(resourceType, params, searchParam, value);
                                        break;
                                case "Money":
                                        addQuantity_MoneyNormalized(resourceType, params, searchParam, value);
                                        break;
                                case "Range":
                                        addQuantity_RangeNormalized(resourceType, params, searchParam, value);
                                        break;
                                default:
                                        addUnexpectedDatatypeWarning(params, searchParam, value, path);
                                        break;
                        }
                };
        }

        @Override
        public SearchParamSet<ResourceIndexedSearchParamString> extractSearchParamStrings(
                        IBaseResource theResource, ISearchParamFilter theSearchParamFilter) {
                IExtractor<ResourceIndexedSearchParamString> extractor = createStringExtractor(theResource);

                return extractSearchParams(
                                theResource, extractor, RestSearchParameterTypeEnum.STRING, false, theSearchParamFilter);
        }

        private IExtractor<ResourceIndexedSearchParamString> createStringExtractor(IBaseResource theResource) {
                String resourceType = toRootTypeName(theResource);
                return (params, searchParam, value, path, theWantLocalReferences) -> {
                        if (value instanceof IPrimitiveType) {
                                IPrimitiveType<?> nextValue = (IPrimitiveType<?>) value;
                                String valueAsString = nextValue.getValueAsString();
                                createStringIndexIfNotBlank(resourceType, params, searchParam, valueAsString);
                                return;
                        }

                        String nextType = toRootTypeName(value);
                        switch (nextType) {
                                case "HumanName":
                                        addString_HumanName(resourceType, params, searchParam, value);
                                        break;
                                case "Address":
                                        addString_Address(resourceType, params, searchParam, value);
                                        break;
                                case "ContactPoint":
                                        addString_ContactPoint(resourceType, params, searchParam, value);
                                        break;
                                case "Quantity":
                                        addString_Quantity(resourceType, params, searchParam, value);
                                        break;
                                case "Range":
                                        addString_Range(resourceType, params, searchParam, value);
                                        break;
                                case "Period":
                                        // Condition.onset[x] can have a Period - Ignored for now
                                        break;
                                default:
                                        addUnexpectedDatatypeWarning(params, searchParam, value, path);
                                        break;
                        }
                };
        }

        /**
         * Override parent because we're using FHIRPath here
         */
        @Override
        public List<IBase> extractValues(String thePaths, IBase theResource) {
                List<IBase> values = new ArrayList<>();
                if (isNotBlank(thePaths)) {
                        String[] nextPathsSplit = split(thePaths);
                        for (String nextPath : nextPathsSplit) {
                                List<? extends IBase> allValues;

                                // This path is hard to parse and isn't likely to produce anything useful anyway
                                if (myContext.getVersion().getVersion().equals(FhirVersionEnum.DSTU2)
                                                && nextPath.equals("Bundle.entry.resource(0)")) {
                                        continue;
                                }

                                nextPath = trim(nextPath);
                                IValueExtractor allValuesFunc = getPathValueExtractor(theResource, nextPath);
                                try {
                                        allValues = allValuesFunc.get();
                                } catch (Exception e) {
                                        String msg = getContext()
                                                        .getLocalizer()
                                                        .getMessage(BaseSearchParamExtractor.class, "failedToExtractPaths", nextPath, e.toString());
                                        throw new InternalErrorException(Msg.code(504) + msg, e);
                                }

                                values.addAll(allValues);
                        }

                        for (int i = 0; i < values.size(); i++) {
                                IBase nextObject = values.get(i);
                                if (nextObject instanceof IBaseExtension) {
                                        IBaseExtension nextExtension = (IBaseExtension) nextObject;
                                        nextObject = nextExtension.getValue();
                                        values.set(i, nextObject);
                                }
                        }
                }

                return values;
        }

        protected FhirContext getContext() {
                return myContext;
        }

        @VisibleForTesting
        public void setContext(FhirContext theContext) {
                myContext = theContext;
        }

        protected StorageSettings getStorageSettings() {
                return myStorageSettings;
        }

        @VisibleForTesting
        public void setStorageSettings(StorageSettings theStorageSettings) {
                myStorageSettings = theStorageSettings;
        }

        @VisibleForTesting
        public void setSearchParamRegistry(ISearchParamRegistry theSearchParamRegistry) {
                mySearchParamRegistry = theSearchParamRegistry;
        }

        private Collection<RuntimeSearchParam> getSearchParams(IBaseResource theResource) {
                RuntimeResourceDefinition def = getContext().getResourceDefinition(theResource);
                Collection<RuntimeSearchParam> retVal =
                                mySearchParamRegistry.getActiveSearchParams(def.getName()).values();
                List<RuntimeSearchParam> defaultList = Collections.emptyList();
                retVal = ObjectUtils.defaultIfNull(retVal, defaultList);
                return retVal;
        }

        private void addQuantity_Quantity(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamQuantity> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                Optional<IPrimitiveType<BigDecimal>> valueField =
                                myQuantityValueValueChild.getAccessor().getFirstValueOrNull(theValue);
                if (valueField.isPresent() && valueField.get().getValue() != null) {
                        BigDecimal nextValueValue = valueField.get().getValue();
                        String system = extractValueAsString(myQuantitySystemValueChild, theValue);
                        String code = extractValueAsString(myQuantityCodeValueChild, theValue);

                        ResourceIndexedSearchParamQuantity nextEntity = new ResourceIndexedSearchParamQuantity(
                                        myPartitionSettings, theResourceType, theSearchParam.getName(), nextValueValue, system, code);

                        theParams.add(nextEntity);
                }
        }

        private void addQuantity_QuantityNormalized(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamQuantityNormalized> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                Optional<IPrimitiveType<BigDecimal>> valueField =
                                myQuantityValueValueChild.getAccessor().getFirstValueOrNull(theValue);
                if (valueField.isPresent() && valueField.get().getValue() != null) {
                        BigDecimal nextValueValue = valueField.get().getValue();
                        String system = extractValueAsString(myQuantitySystemValueChild, theValue);
                        String code = extractValueAsString(myQuantityCodeValueChild, theValue);

                        // -- convert the value/unit to the canonical form if any
                        Pair canonicalForm = UcumServiceUtil.getCanonicalForm(system, nextValueValue, code);
                        if (canonicalForm != null) {
                                double canonicalValue =
                                                Double.parseDouble(canonicalForm.getValue().asDecimal());
                                String canonicalUnits = canonicalForm.getCode();
                                ResourceIndexedSearchParamQuantityNormalized nextEntity =
                                                new ResourceIndexedSearchParamQuantityNormalized(
                                                                myPartitionSettings,
                                                                theResourceType,
                                                                theSearchParam.getName(),
                                                                canonicalValue,
                                                                system,
                                                                canonicalUnits);
                                theParams.add(nextEntity);
                        }
                }
        }

        private void addQuantity_Money(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamQuantity> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                Optional<IPrimitiveType<BigDecimal>> valueField =
                                myMoneyValueChild.getAccessor().getFirstValueOrNull(theValue);
                if (valueField.isPresent() && valueField.get().getValue() != null) {
                        BigDecimal nextValueValue = valueField.get().getValue();

                        String nextValueString = "urn:iso:std:iso:4217";
                        String nextValueCode = extractValueAsString(myMoneyCurrencyChild, theValue);
                        String searchParamName = theSearchParam.getName();

                        ResourceIndexedSearchParamQuantity nextEntity = new ResourceIndexedSearchParamQuantity(
                                        myPartitionSettings,
                                        theResourceType,
                                        searchParamName,
                                        nextValueValue,
                                        nextValueString,
                                        nextValueCode);
                        theParams.add(nextEntity);
                }
        }

        private void addQuantity_MoneyNormalized(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamQuantityNormalized> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                Optional<IPrimitiveType<BigDecimal>> valueField =
                                myMoneyValueChild.getAccessor().getFirstValueOrNull(theValue);
                if (valueField.isPresent() && valueField.get().getValue() != null) {
                        BigDecimal nextValueValue = valueField.get().getValue();

                        String nextValueString = "urn:iso:std:iso:4217";
                        String nextValueCode = extractValueAsString(myMoneyCurrencyChild, theValue);
                        String searchParamName = theSearchParam.getName();

                        ResourceIndexedSearchParamQuantityNormalized nextEntityNormalized =
                                        new ResourceIndexedSearchParamQuantityNormalized(
                                                        myPartitionSettings,
                                                        theResourceType,
                                                        searchParamName,
                                                        nextValueValue.doubleValue(),
                                                        nextValueString,
                                                        nextValueCode);
                        theParams.add(nextEntityNormalized);
                }
        }

        private void addQuantity_Range(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamQuantity> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                Optional<IBase> low = myRangeLowValueChild.getAccessor().getFirstValueOrNull(theValue);
                low.ifPresent(theIBase -> addQuantity_Quantity(theResourceType, theParams, theSearchParam, theIBase));

                Optional<IBase> high = myRangeHighValueChild.getAccessor().getFirstValueOrNull(theValue);
                high.ifPresent(theIBase -> addQuantity_Quantity(theResourceType, theParams, theSearchParam, theIBase));
        }

        private void addQuantity_RangeNormalized(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamQuantityNormalized> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                Optional<IBase> low = myRangeLowValueChild.getAccessor().getFirstValueOrNull(theValue);
                low.ifPresent(theIBase -> addQuantity_QuantityNormalized(theResourceType, theParams, theSearchParam, theIBase));

                Optional<IBase> high = myRangeHighValueChild.getAccessor().getFirstValueOrNull(theValue);
                high.ifPresent(
                                theIBase -> addQuantity_QuantityNormalized(theResourceType, theParams, theSearchParam, theIBase));
        }

        @SuppressWarnings("unchecked")
        private void addToken_Identifier(
                        String theResourceType,
                        Set<BaseResourceIndexedSearchParam> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                String system = extractValueAsString(myIdentifierSystemValueChild, theValue);
                String value = extractValueAsString(myIdentifierValueValueChild, theValue);
                if (isNotBlank(value)) {
                        createTokenIndexIfNotBlankAndAdd(theResourceType, theParams, theSearchParam, system, value);

                        boolean indexIdentifierType = myStorageSettings.isIndexIdentifierOfType();
                        if (indexIdentifierType) {
                                Optional<IBase> type = myIdentifierTypeValueChild.getAccessor().getFirstValueOrNull(theValue);
                                if (type.isPresent()) {
                                        List<IBase> codings =
                                                        myCodeableConceptCodingValueChild.getAccessor().getValues(type.get());
                                        for (IBase nextCoding : codings) {

                                                String typeSystem = myCodingSystemValueChild
                                                                .getAccessor()
                                                                .getFirstValueOrNull(nextCoding)
                                                                .map(t -> ((IPrimitiveType<String>) t).getValue())
                                                                .orElse(null);
                                                String typeValue = myCodingCodeValueChild
                                                                .getAccessor()
                                                                .getFirstValueOrNull(nextCoding)
                                                                .map(t -> ((IPrimitiveType<String>) t).getValue())
                                                                .orElse(null);
                                                if (isNotBlank(typeSystem) && isNotBlank(typeValue)) {
                                                        String paramName = theSearchParam.getName() + Constants.PARAMQUALIFIER_TOKEN_OF_TYPE;
                                                        ResourceIndexedSearchParamToken token = createTokenIndexIfNotBlank(
                                                                        theResourceType, typeSystem, typeValue + "|" + value, paramName);
                                                        if (token != null) {
                                                                theParams.add(token);
                                                        }
                                                }
                                        }
                                }
                        }
                }
        }

        protected boolean shouldIndexTextComponentOfToken(RuntimeSearchParam theSearchParam) {
                return tokenTextIndexingEnabledForSearchParam(myStorageSettings, theSearchParam);
        }

        private void addToken_CodeableConcept(
                        String theResourceType,
                        Set<BaseResourceIndexedSearchParam> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                List<IBase> codings = getCodingsFromCodeableConcept(theValue);
                for (IBase nextCoding : codings) {
                        addToken_Coding(theResourceType, theParams, theSearchParam, nextCoding);
                }

                if (shouldIndexTextComponentOfToken(theSearchParam)) {
                        String text = getDisplayTextFromCodeableConcept(theValue);
                        if (isNotBlank(text)) {
                                createStringIndexIfNotBlank(theResourceType, theParams, theSearchParam, text);
                        }
                }
        }

        @Override
        public List<IBase> getCodingsFromCodeableConcept(IBase theValue) {
                String nextType = BaseSearchParamExtractor.this.toRootTypeName(theValue);
                if ("CodeableConcept".equals(nextType)) {
                        return myCodeableConceptCodingValueChild.getAccessor().getValues(theValue);
                } else {
                        return null;
                }
        }

        @Override
        public String getDisplayTextFromCodeableConcept(IBase theValue) {
                String nextType = BaseSearchParamExtractor.this.toRootTypeName(theValue);
                if ("CodeableConcept".equals(nextType)) {
                        return extractValueAsString(myCodeableConceptTextValueChild, theValue);
                } else {
                        return null;
                }
        }

        private void addToken_Coding(
                        String theResourceType,
                        Set<BaseResourceIndexedSearchParam> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                ResourceIndexedSearchParamToken resourceIndexedSearchParamToken =
                                createSearchParamForCoding(theResourceType, theSearchParam, theValue);
                if (resourceIndexedSearchParamToken != null) {
                        theParams.add(resourceIndexedSearchParamToken);
                }

                if (shouldIndexTextComponentOfToken(theSearchParam)) {
                        String text = getDisplayTextForCoding(theValue);
                        createStringIndexIfNotBlank(theResourceType, theParams, theSearchParam, text);
                }
        }

        @Override
        public ResourceIndexedSearchParamToken createSearchParamForCoding(
                        String theResourceType, RuntimeSearchParam theSearchParam, IBase theValue) {
                String nextType = BaseSearchParamExtractor.this.toRootTypeName(theValue);
                if ("Coding".equals(nextType)) {
                        String system = extractValueAsString(myCodingSystemValueChild, theValue);
                        String code = extractValueAsString(myCodingCodeValueChild, theValue);
                        return createTokenIndexIfNotBlank(theResourceType, system, code, theSearchParam.getName());
                } else {
                        return null;
                }
        }

        @Override
        public String getDisplayTextForCoding(IBase theValue) {
                String nextType = BaseSearchParamExtractor.this.toRootTypeName(theValue);
                if ("Coding".equals(nextType)) {
                        return extractValueAsString(myCodingDisplayValueChild, theValue);
                } else {
                        return null;
                }
        }

        private void addToken_ContactPoint(
                        String theResourceType,
                        Set<BaseResourceIndexedSearchParam> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                String system = extractValueAsString(myContactPointSystemValueChild, theValue);
                String value = extractValueAsString(myContactPointValueValueChild, theValue);
                createTokenIndexIfNotBlankAndAdd(theResourceType, theParams, theSearchParam, system, value);
        }

        private void addToken_CodeableReference(
                        String theResourceType,
                        Set<BaseResourceIndexedSearchParam> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                Optional<IBase> conceptOpt = myCodeableReferenceConcept.getAccessor().getFirstValueOrNull(theValue);
                conceptOpt.ifPresent(concept -> addToken_CodeableConcept(theResourceType, theParams, theSearchParam, concept));
        }

        private void addToken_PatientCommunication(
                        String theResourceType,
                        Set<BaseResourceIndexedSearchParam> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                List<IBase> values =
                                myPatientCommunicationLanguageValueChild.getAccessor().getValues(theValue);
                for (IBase next : values) {
                        addToken_CodeableConcept(theResourceType, theParams, theSearchParam, next);
                }
        }

        private void addToken_CapabilityStatementRestSecurity(
                        String theResourceType,
                        Set<BaseResourceIndexedSearchParam> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                List<IBase> values =
                                myCapabilityStatementRestSecurityServiceValueChild.getAccessor().getValues(theValue);
                for (IBase nextValue : values) {
                        addToken_CodeableConcept(theResourceType, theParams, theSearchParam, nextValue);
                }
        }

        private void addDate_Period(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamDate> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                Date start = extractValueAsDate(myPeriodStartValueChild, theValue);
                String startAsString = extractValueAsString(myPeriodStartValueChild, theValue);
                Date end = extractValueAsDate(myPeriodEndValueChild, theValue);
                String endAsString = extractValueAsString(myPeriodEndValueChild, theValue);

                if (start != null || end != null) {

                        if (start == null) {
                                start = myStorageSettings.getPeriodIndexStartOfTime().getValue();
                                startAsString = myStorageSettings.getPeriodIndexStartOfTime().getValueAsString();
                        }
                        if (end == null) {
                                end = myStorageSettings.getPeriodIndexEndOfTime().getValue();
                                endAsString = myStorageSettings.getPeriodIndexEndOfTime().getValueAsString();
                        }

                        ResourceIndexedSearchParamDate nextEntity = new ResourceIndexedSearchParamDate(
                                        myPartitionSettings,
                                        theResourceType,
                                        theSearchParam.getName(),
                                        start,
                                        startAsString,
                                        end,
                                        endAsString,
                                        startAsString);
                        theParams.add(nextEntity);
                }
        }

        private void addDate_Timing(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamDate> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                List<IPrimitiveType<Date>> values = extractValuesAsFhirDates(myTimingEventValueChild, theValue);

                TreeSet<Date> dates = new TreeSet<>();
                TreeSet<String> dateStrings = new TreeSet<>();
                String firstValue = null;
                String finalValue = null;
                for (IPrimitiveType<Date> nextEvent : values) {
                        if (nextEvent.getValue() != null) {
                                dates.add(nextEvent.getValue());
                                if (firstValue == null) {
                                        firstValue = nextEvent.getValueAsString();
                                }
                                finalValue = nextEvent.getValueAsString();
                        }
                }

                Optional<IBase> repeat = myTimingRepeatValueChild.getAccessor().getFirstValueOrNull(theValue);
                if (repeat.isPresent()) {
                        Optional<IBase> bounds =
                                        myTimingRepeatBoundsValueChild.getAccessor().getFirstValueOrNull(repeat.get());
                        if (bounds.isPresent()) {
                                String boundsType = toRootTypeName(bounds.get());
                                if ("Period".equals(boundsType)) {
                                        Date start = extractValueAsDate(myPeriodStartValueChild, bounds.get());
                                        Date end = extractValueAsDate(myPeriodEndValueChild, bounds.get());
                                        String endString = extractValueAsString(myPeriodEndValueChild, bounds.get());
                                        dates.add(start);
                                        dates.add(end);
                                        // TODO Check if this logic is valid. Does the start of the first period indicate a lower bound??
                                        if (firstValue == null) {
                                                firstValue = extractValueAsString(myPeriodStartValueChild, bounds.get());
                                        }
                                        finalValue = endString;
                                }
                        }
                }

                if (!dates.isEmpty()) {
                        ResourceIndexedSearchParamDate nextEntity = new ResourceIndexedSearchParamDate(
                                        myPartitionSettings,
                                        theResourceType,
                                        theSearchParam.getName(),
                                        dates.first(),
                                        firstValue,
                                        dates.last(),
                                        finalValue,
                                        firstValue);
                        theParams.add(nextEntity);
                }
        }

        private void addNumber_Duration(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamNumber> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                String system = extractValueAsString(myDurationSystemValueChild, theValue);
                String code = extractValueAsString(myDurationCodeValueChild, theValue);
                BigDecimal value = extractValueAsBigDecimal(myDurationValueValueChild, theValue);
                if (value != null) {
                        value = normalizeQuantityContainingTimeUnitsIntoDaysForNumberParam(system, code, value);
                        ResourceIndexedSearchParamNumber nextEntity = new ResourceIndexedSearchParamNumber(
                                        myPartitionSettings, theResourceType, theSearchParam.getName(), value);
                        theParams.add(nextEntity);
                }
        }

        private void addNumber_Quantity(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamNumber> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                BigDecimal value = extractValueAsBigDecimal(myQuantityValueValueChild, theValue);
                if (value != null) {
                        String system = extractValueAsString(myQuantitySystemValueChild, theValue);
                        String code = extractValueAsString(myQuantityCodeValueChild, theValue);
                        value = normalizeQuantityContainingTimeUnitsIntoDaysForNumberParam(system, code, value);
                        ResourceIndexedSearchParamNumber nextEntity = new ResourceIndexedSearchParamNumber(
                                        myPartitionSettings, theResourceType, theSearchParam.getName(), value);
                        theParams.add(nextEntity);
                }
        }

        @SuppressWarnings("unchecked")
        private void addNumber_Range(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamNumber> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                Optional<IBase> low = myRangeLowValueChild.getAccessor().getFirstValueOrNull(theValue);
                low.ifPresent(value -> addNumber_Quantity(theResourceType, theParams, theSearchParam, value));

                Optional<IBase> high = myRangeHighValueChild.getAccessor().getFirstValueOrNull(theValue);
                high.ifPresent(value -> addNumber_Quantity(theResourceType, theParams, theSearchParam, value));
        }

        @SuppressWarnings("unchecked")
        private void addNumber_Integer(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamNumber> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                IPrimitiveType<Integer> value = (IPrimitiveType<Integer>) theValue;
                if (value.getValue() != null) {
                        BigDecimal valueDecimal = new BigDecimal(value.getValue());
                        ResourceIndexedSearchParamNumber nextEntity = new ResourceIndexedSearchParamNumber(
                                        myPartitionSettings, theResourceType, theSearchParam.getName(), valueDecimal);
                        theParams.add(nextEntity);
                }
        }

        @SuppressWarnings("unchecked")
        private void addNumber_Decimal(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamNumber> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                IPrimitiveType<BigDecimal> value = (IPrimitiveType<BigDecimal>) theValue;
                if (value.getValue() != null) {
                        BigDecimal valueDecimal = value.getValue();
                        ResourceIndexedSearchParamNumber nextEntity = new ResourceIndexedSearchParamNumber(
                                        myPartitionSettings, theResourceType, theSearchParam.getName(), valueDecimal);
                        theParams.add(nextEntity);
                }
        }

        private void addCoords_Position(
                        String theResourceType,
                        SearchParamSet<BaseResourceIndexedSearchParam> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                BigDecimal latitude = null;
                BigDecimal longitude = null;

                if (theValue instanceof org.hl7.fhir.dstu3.model.Location.LocationPositionComponent) {
                        org.hl7.fhir.dstu3.model.Location.LocationPositionComponent value =
                                        (org.hl7.fhir.dstu3.model.Location.LocationPositionComponent) theValue;
                        latitude = value.getLatitude();
                        longitude = value.getLongitude();
                } else if (theValue instanceof org.hl7.fhir.r4.model.Location.LocationPositionComponent) {
                        org.hl7.fhir.r4.model.Location.LocationPositionComponent value =
                                        (org.hl7.fhir.r4.model.Location.LocationPositionComponent) theValue;
                        latitude = value.getLatitude();
                        longitude = value.getLongitude();
                } else if (theValue instanceof org.hl7.fhir.r5.model.Location.LocationPositionComponent) {
                        org.hl7.fhir.r5.model.Location.LocationPositionComponent value =
                                        (org.hl7.fhir.r5.model.Location.LocationPositionComponent) theValue;
                        latitude = value.getLatitude();
                        longitude = value.getLongitude();
                }
                // We only accept coordinates when both are present
                if (latitude != null && longitude != null) {
                        double normalizedLatitude = GeopointNormalizer.normalizeLatitude(latitude.doubleValue());
                        double normalizedLongitude = GeopointNormalizer.normalizeLongitude(longitude.doubleValue());
                        ResourceIndexedSearchParamCoords nextEntity = new ResourceIndexedSearchParamCoords(
                                        myPartitionSettings,
                                        theResourceType,
                                        theSearchParam.getName(),
                                        normalizedLatitude,
                                        normalizedLongitude);
                        theParams.add(nextEntity);
                }
        }

        private void addString_HumanName(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamString> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                List<BaseRuntimeChildDefinition> myHumanNameChildren = Arrays.asList(
                                myHumanNameFamilyValueChild,
                                myHumanNameGivenValueChild,
                                myHumanNameTextValueChild,
                                myHumanNamePrefixValueChild,
                                myHumanNameSuffixValueChild);
                for (BaseRuntimeChildDefinition theChild : myHumanNameChildren) {
                        List<String> indices = extractValuesAsStrings(theChild, theValue);
                        for (String next : indices) {
                                createStringIndexIfNotBlank(theResourceType, theParams, theSearchParam, next);
                        }
                }
        }

        private void addString_Quantity(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamString> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                BigDecimal value = extractValueAsBigDecimal(myQuantityValueValueChild, theValue);
                if (value != null) {
                        createStringIndexIfNotBlank(theResourceType, theParams, theSearchParam, value.toPlainString());
                }
        }

        private void addString_Range(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamString> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                Optional<IBase> value = myRangeLowValueChild.getAccessor().getFirstValueOrNull(theValue);
                value.ifPresent(t -> addString_Quantity(theResourceType, theParams, theSearchParam, t));
        }

        private void addString_ContactPoint(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamString> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {

                String value = extractValueAsString(myContactPointValueValueChild, theValue);
                if (isNotBlank(value)) {
                        createStringIndexIfNotBlank(theResourceType, theParams, theSearchParam, value);
                }
        }

        private void addString_Address(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamString> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {

                List<String> allNames = new ArrayList<>(extractValuesAsStrings(myAddressLineValueChild, theValue));

                String city = extractValueAsString(myAddressCityValueChild, theValue);
                if (isNotBlank(city)) {
                        allNames.add(city);
                }

                String district = extractValueAsString(myAddressDistrictValueChild, theValue);
                if (isNotBlank(district)) {
                        allNames.add(district);
                }

                String state = extractValueAsString(myAddressStateValueChild, theValue);
                if (isNotBlank(state)) {
                        allNames.add(state);
                }

                String country = extractValueAsString(myAddressCountryValueChild, theValue);
                if (isNotBlank(country)) {
                        allNames.add(country);
                }

                String postalCode = extractValueAsString(myAddressPostalCodeValueChild, theValue);
                if (isNotBlank(postalCode)) {
                        allNames.add(postalCode);
                }

                for (String nextName : allNames) {
                        createStringIndexIfNotBlank(theResourceType, theParams, theSearchParam, nextName);
                }
        }

        /**
         * Ignore any of the Resource-level search params. This is kind of awkward, but here is why
         * we do it:
         * <p>
         * The ReadOnlySearchParamCache supplies these params, and they have paths associated with
         * them. E.g. HAPI's SearchParamRegistryImpl will know about the _id search parameter and
         * assigns it the path "Resource.id". All of these parameters have indexing code paths in the
         * server that don't rely on the existence of the SearchParameter. For example, we have a
         * dedicated column on ResourceTable that handles the _id parameter.
         * <p>
         * Until 6.2.0 the FhirPath evaluator didn't actually resolve any values for these paths
         * that started with Resource instead of the actual resource name, so it never actually
         * made a difference that these parameters existed because they'd never actually result
         * in any index rows. In 6.4.0 that bug was fixed in the core FhirPath engine. We don't
         * want that fix to result in pointless index rows for things like _id and _tag, so we
         * ignore them here.
         * <p>
         * Note that you can still create a search parameter that includes a path like
         * "meta.tag" if you really need to create an SP that actually does index _tag. This
         * is needed if you want to search for tags in <code>INLINE</code> tag storage mode.
         * This is the only way you could actually specify a FhirPath expression for those
         * prior to 6.2.0 so this isn't a breaking change.
         */
        <T> SearchParamSet<T> extractSearchParams(
                        IBaseResource theResource,
                        IExtractor<T> theExtractor,
                        RestSearchParameterTypeEnum theSearchParamType,
                        boolean theWantLocalReferences,
                        ISearchParamFilter theSearchParamFilter) {
                SearchParamSet<T> retVal = new SearchParamSet<>();

                Collection<RuntimeSearchParam> searchParams = getSearchParams(theResource);

                int preFilterSize = searchParams.size();
                Collection<RuntimeSearchParam> filteredSearchParams = theSearchParamFilter.filterSearchParams(searchParams);
                assert filteredSearchParams.size() == preFilterSize || searchParams != filteredSearchParams;

                cleanUpContainedResourceReferences(theResource, theSearchParamType, filteredSearchParams);

                for (RuntimeSearchParam nextSpDef : filteredSearchParams) {
                        if (nextSpDef.getParamType() != theSearchParamType) {
                                continue;
                        }

                        // See the method javadoc for an explanation of this
                        if (RuntimeSearchParamHelper.isResourceLevel(nextSpDef)) {
                                continue;
                        }

                        extractSearchParam(nextSpDef, theResource, theExtractor, retVal, theWantLocalReferences);
                }
                return retVal;
        }

        /**
         * Helper function to determine if a set of SPs for a resource uses a resolve as part of its fhir path.
         */
        private boolean anySearchParameterUsesResolve(
                        Collection<RuntimeSearchParam> searchParams, RestSearchParameterTypeEnum theSearchParamType) {
                return searchParams.stream()
                                .filter(param -> param.getParamType() != theSearchParamType)
                                .map(RuntimeSearchParam::getPath)
                                .filter(Objects::nonNull)
                                .anyMatch(path -> path.contains("resolve"));
        }

        /**
         * HAPI FHIR Reference objects (e.g. {@link org.hl7.fhir.r4.model.Reference}) can hold references either by text
         * (e.g. "#3") or by resource (e.g. "new Reference(patientInstance)"). The FHIRPath evaluator only understands the
         * first way, so if there is any chance of the FHIRPath evaluator needing to descend across references, we
         * have to assign values to those references before indexing.
         * <p>
         * Doing this cleanup isn't hugely expensive, but it's not completely free either so we only do it
         * if we think there's actually a chance
         */
        private void cleanUpContainedResourceReferences(
                        IBaseResource theResource,
                        RestSearchParameterTypeEnum theSearchParamType,
                        Collection<RuntimeSearchParam> searchParams) {
                boolean havePathWithResolveExpression = myStorageSettings.isIndexOnContainedResources()
                                || anySearchParameterUsesResolve(searchParams, theSearchParamType);

                if (havePathWithResolveExpression && myContext.getParserOptions().isAutoContainReferenceTargetsWithNoId()) {
                        // TODO GGG/JA: At this point, if the Task.basedOn.reference.resource does _not_ have an ID, we will attempt
                        // to contain it internally. Wild
                        myContext
                                        .newTerser()
                                        .containResources(
                                                        theResource,
                                                        FhirTerser.OptionsEnum.MODIFY_RESOURCE,
                                                        FhirTerser.OptionsEnum.STORE_AND_REUSE_RESULTS);
                }
        }

        /**
         * extract for normal SP
         */
        @VisibleForTesting
        public <T> void extractSearchParam(
                        RuntimeSearchParam theSearchParameterDef,
                        IBase theResource,
                        IExtractor<T> theExtractor,
                        SearchParamSet<T> theSetToPopulate,
                        boolean theWantLocalReferences) {
                String nextPathUnsplit = theSearchParameterDef.getPath();
                extractSearchParam(
                                theSearchParameterDef,
                                nextPathUnsplit,
                                theResource,
                                theExtractor,
                                theSetToPopulate,
                                theWantLocalReferences);
        }

        /**
         * extract for SP, but with possibly different expression.
         * Allows composite SPs to use sub-paths.
         */
        private <T> void extractSearchParam(
                        RuntimeSearchParam theSearchParameterDef,
                        String thePathExpression,
                        IBase theResource,
                        IExtractor<T> theExtractor,
                        SearchParamSet<T> theSetToPopulate,
                        boolean theWantLocalReferences) {
                if (isBlank(thePathExpression)) {
                        return;
                }

                String[] splitPaths = split(thePathExpression);
                for (String nextPath : splitPaths) {
                        nextPath = trim(nextPath);
                        for (IBase nextObject : extractValues(nextPath, theResource)) {
                                if (nextObject != null) {
                                        String typeName = toRootTypeName(nextObject);
                                        if (!myIgnoredForSearchDatatypes.contains(typeName)) {
                                                theExtractor.extract(
                                                                theSetToPopulate, theSearchParameterDef, nextObject, nextPath, theWantLocalReferences);
                                        }
                                }
                        }
                }
        }

        @Override
        public String toRootTypeName(IBase nextObject) {
                BaseRuntimeElementDefinition<?> elementDefinition = getContext().getElementDefinition(nextObject.getClass());
                BaseRuntimeElementDefinition<?> rootParentDefinition = elementDefinition.getRootParentDefinition();
                return rootParentDefinition.getName();
        }

        @Override
        public String toTypeName(IBase nextObject) {
                BaseRuntimeElementDefinition<?> elementDefinition = getContext().getElementDefinition(nextObject.getClass());
                return elementDefinition.getName();
        }

        private void addUri_Uri(
                        String theResourceType,
                        Set<ResourceIndexedSearchParamUri> theParams,
                        RuntimeSearchParam theSearchParam,
                        IBase theValue) {
                IPrimitiveType<?> value = (IPrimitiveType<?>) theValue;
                String valueAsString = value.getValueAsString();
                if (isNotBlank(valueAsString)) {
                        ResourceIndexedSearchParamUri nextEntity = new ResourceIndexedSearchParamUri(
                                        myPartitionSettings, theResourceType, theSearchParam.getName(), valueAsString);
                        theParams.add(nextEntity);
                }
        }

        @SuppressWarnings({"unchecked", "UnnecessaryLocalVariable"})
        private void createStringIndexIfNotBlank(
                        String theResourceType,
                        Set<? extends BaseResourceIndexedSearchParam> theParams,
                        RuntimeSearchParam theSearchParam,
                        String theValue) {
                String value = theValue;
                if (isNotBlank(value)) {
                        if (value.length() > ResourceIndexedSearchParamString.MAX_LENGTH) {
                                value = value.substring(0, ResourceIndexedSearchParamString.MAX_LENGTH);
                        }

                        String searchParamName = theSearchParam.getName();
                        String valueNormalized = StringUtil.normalizeStringForSearchIndexing(value);
                        String valueEncoded = theSearchParam.encode(valueNormalized);

                        if (valueEncoded.length() > ResourceIndexedSearchParamString.MAX_LENGTH) {
                                valueEncoded = valueEncoded.substring(0, ResourceIndexedSearchParamString.MAX_LENGTH);
                        }

                        ResourceIndexedSearchParamString nextEntity = new ResourceIndexedSearchParamString(
                                        myPartitionSettings, getStorageSettings(), theResourceType, searchParamName, valueEncoded, value);

                        Set params = theParams;
                        params.add(nextEntity);
                }
        }

        private void createTokenIndexIfNotBlankAndAdd(
                        String theResourceType,
                        Set<BaseResourceIndexedSearchParam> theParams,
                        RuntimeSearchParam theSearchParam,
                        String theSystem,
                        String theValue) {
                ResourceIndexedSearchParamToken nextEntity =
                                createTokenIndexIfNotBlank(theResourceType, theSystem, theValue, theSearchParam.getName());
                if (nextEntity != null) {
                        theParams.add(nextEntity);
                }
        }

        @VisibleForTesting
        public void setPartitionSettings(PartitionSettings thePartitionSettings) {
                myPartitionSettings = thePartitionSettings;
        }

        private ResourceIndexedSearchParamToken createTokenIndexIfNotBlank(
                        String theResourceType, String theSystem, String theValue, String searchParamName) {
                ResourceIndexedSearchParamToken nextEntity = null;
                if (isNotBlank(theSystem) || isNotBlank(theValue)) {
                        nextEntity = new ResourceIndexedSearchParamToken(
                                        myPartitionSettings, theResourceType, searchParamName, theSystem, theValue);
                }
                return nextEntity;
        }

        @Override
        public String[] split(String thePaths) {
                if (shouldAttemptToSplitPath(thePaths)) {
                        return splitOutOfParensOrs(thePaths);
                } else {
                        return new String[] {thePaths};
                }
        }

        public boolean shouldAttemptToSplitPath(String thePath) {
                if (getContext().getVersion().getVersion().isEqualOrNewerThan(FhirVersionEnum.R4)) {
                        if (thePath.contains("|")) {
                                return true;
                        }
                } else {
                        // DSTU 3 and below used "or" as well as "|"
                        if (thePath.contains("|") || thePath.contains(" or ")) {
                                return true;
                        }
                }
                return false;
        }

        /**
         * Iteratively splits a string on any ` or ` or | that is ** not** contained inside a set of parentheses. e.g.
         * <p>
         * "Patient.select(a or b)" -->  ["Patient.select(a or b)"]
         * "Patient.select(a or b) or Patient.select(c or d )" --> ["Patient.select(a or b)", "Patient.select(c or d)"]
         * "Patient.select(a|b) or Patient.select(c or d )" --> ["Patient.select(a|b)", "Patient.select(c or d)"]
         * "Patient.select(b) | Patient.select(c)" -->  ["Patient.select(b)", "Patient.select(c)"]
         *
         * @param thePaths The string to split
         * @return The split string
         */
        private String[] splitOutOfParensOrs(String thePaths) {
                List<String> topLevelOrExpressions = splitOutOfParensToken(thePaths, " or ");
                List<String> retVal = topLevelOrExpressions.stream()
                                .flatMap(s -> splitOutOfParensToken(s, " |").stream())
                                .collect(Collectors.toList());
                return retVal.toArray(new String[retVal.size()]);
        }

        private List<String> splitOutOfParensToken(String thePath, String theToken) {
                int tokenLength = theToken.length();
                int index = thePath.indexOf(theToken);
                int rightIndex = 0;
                List<String> retVal = new ArrayList<>();
                while (index > -1) {
                        String left = thePath.substring(rightIndex, index);
                        if (allParensHaveBeenClosed(left)) {
                                retVal.add(left);
                                rightIndex = index + tokenLength;
                        }
                        index = thePath.indexOf(theToken, index + tokenLength);
                }
                retVal.add(thePath.substring(rightIndex));
                return retVal;
        }

        private boolean allParensHaveBeenClosed(String thePaths) {
                int open = StringUtils.countMatches(thePaths, "(");
                int close = StringUtils.countMatches(thePaths, ")");
                return open == close;
        }

        private BigDecimal normalizeQuantityContainingTimeUnitsIntoDaysForNumberParam(
                        String theSystem, String theCode, BigDecimal theValue) {
                if (SearchParamConstants.UCUM_NS.equals(theSystem)) {
                        if (isNotBlank(theCode)) {
                                Unit<? extends Quantity> unit = Unit.valueOf(theCode);
                                javax.measure.converter.UnitConverter dayConverter = unit.getConverterTo(NonSI.DAY);
                                double dayValue = dayConverter.convert(theValue.doubleValue());
                                theValue = new BigDecimal(dayValue);
                        }
                }
                return theValue;
        }

        @PostConstruct
        public void start() {
                myIgnoredForSearchDatatypes = new HashSet<>();
                addIgnoredType(getContext(), "Annotation", myIgnoredForSearchDatatypes);
                addIgnoredType(getContext(), "Attachment", myIgnoredForSearchDatatypes);
                addIgnoredType(getContext(), "Count", myIgnoredForSearchDatatypes);
                addIgnoredType(getContext(), "Distance", myIgnoredForSearchDatatypes);
                addIgnoredType(getContext(), "Ratio", myIgnoredForSearchDatatypes);
                addIgnoredType(getContext(), "SampledData", myIgnoredForSearchDatatypes);
                addIgnoredType(getContext(), "Signature", myIgnoredForSearchDatatypes);

                /*
                 * This is building up an internal map of all the various field accessors we'll need in order to work
                 * with the model. This is kind of ugly, but we want to be as efficient as possible since
                 * search param extraction happens a whole heck of a lot at runtime..
                 */

                BaseRuntimeElementCompositeDefinition<?> quantityDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("Quantity");
                myQuantityValueValueChild = quantityDefinition.getChildByName("value");
                myQuantitySystemValueChild = quantityDefinition.getChildByName("system");
                myQuantityCodeValueChild = quantityDefinition.getChildByName("code");

                BaseRuntimeElementCompositeDefinition<?> moneyDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("Money");
                myMoneyValueChild = moneyDefinition.getChildByName("value");
                myMoneyCurrencyChild = moneyDefinition.getChildByName("currency");

                BaseRuntimeElementCompositeDefinition<?> locationDefinition =
                                getContext().getResourceDefinition("Location");
                BaseRuntimeChildDefinition locationPositionValueChild = locationDefinition.getChildByName("position");
                myLocationPositionDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) locationPositionValueChild.getChildByName("position");

                BaseRuntimeElementCompositeDefinition<?> rangeDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("Range");
                myRangeLowValueChild = rangeDefinition.getChildByName("low");
                myRangeHighValueChild = rangeDefinition.getChildByName("high");

                BaseRuntimeElementCompositeDefinition<?> addressDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("Address");
                myAddressLineValueChild = addressDefinition.getChildByName("line");
                myAddressCityValueChild = addressDefinition.getChildByName("city");
                myAddressDistrictValueChild = addressDefinition.getChildByName("district");
                myAddressStateValueChild = addressDefinition.getChildByName("state");
                myAddressCountryValueChild = addressDefinition.getChildByName("country");
                myAddressPostalCodeValueChild = addressDefinition.getChildByName("postalCode");

                BaseRuntimeElementCompositeDefinition<?> periodDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("Period");
                myPeriodStartValueChild = periodDefinition.getChildByName("start");
                myPeriodEndValueChild = periodDefinition.getChildByName("end");

                BaseRuntimeElementCompositeDefinition<?> timingDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("Timing");
                myTimingEventValueChild = timingDefinition.getChildByName("event");
                myTimingRepeatValueChild = timingDefinition.getChildByName("repeat");
                BaseRuntimeElementCompositeDefinition<?> timingRepeatDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) myTimingRepeatValueChild.getChildByName("repeat");
                myTimingRepeatBoundsValueChild = timingRepeatDefinition.getChildByName("bounds[x]");

                BaseRuntimeElementCompositeDefinition<?> durationDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("Duration");
                myDurationSystemValueChild = durationDefinition.getChildByName("system");
                myDurationCodeValueChild = durationDefinition.getChildByName("code");
                myDurationValueValueChild = durationDefinition.getChildByName("value");

                BaseRuntimeElementCompositeDefinition<?> humanNameDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("HumanName");
                myHumanNameFamilyValueChild = humanNameDefinition.getChildByName("family");
                myHumanNameGivenValueChild = humanNameDefinition.getChildByName("given");
                myHumanNameTextValueChild = humanNameDefinition.getChildByName("text");
                myHumanNamePrefixValueChild = humanNameDefinition.getChildByName("prefix");
                myHumanNameSuffixValueChild = humanNameDefinition.getChildByName("suffix");

                BaseRuntimeElementCompositeDefinition<?> contactPointDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("ContactPoint");
                myContactPointValueValueChild = contactPointDefinition.getChildByName("value");
                myContactPointSystemValueChild = contactPointDefinition.getChildByName("system");

                BaseRuntimeElementCompositeDefinition<?> identifierDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("Identifier");
                myIdentifierSystemValueChild = identifierDefinition.getChildByName("system");
                myIdentifierValueValueChild = identifierDefinition.getChildByName("value");
                myIdentifierTypeValueChild = identifierDefinition.getChildByName("type");
                BaseRuntimeElementCompositeDefinition<?> identifierTypeDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) myIdentifierTypeValueChild.getChildByName("type");
                myIdentifierTypeTextValueChild = identifierTypeDefinition.getChildByName("text");

                BaseRuntimeElementCompositeDefinition<?> codeableConceptDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("CodeableConcept");
                myCodeableConceptCodingValueChild = codeableConceptDefinition.getChildByName("coding");
                myCodeableConceptTextValueChild = codeableConceptDefinition.getChildByName("text");

                BaseRuntimeElementCompositeDefinition<?> codingDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("Coding");
                myCodingSystemValueChild = codingDefinition.getChildByName("system");
                myCodingCodeValueChild = codingDefinition.getChildByName("code");
                myCodingDisplayValueChild = codingDefinition.getChildByName("display");

                BaseRuntimeElementCompositeDefinition<?> patientDefinition =
                                getContext().getResourceDefinition("Patient");
                BaseRuntimeChildDefinition patientCommunicationValueChild = patientDefinition.getChildByName("communication");
                BaseRuntimeElementCompositeDefinition<?> patientCommunicationDefinition =
                                (BaseRuntimeElementCompositeDefinition<?>)
                                                patientCommunicationValueChild.getChildByName("communication");
                myPatientCommunicationLanguageValueChild = patientCommunicationDefinition.getChildByName("language");

                // DSTU3+
                BaseRuntimeElementCompositeDefinition<?> codeSystemDefinition;
                if (getContext().getVersion().getVersion().isEqualOrNewerThan(FhirVersionEnum.DSTU3)) {
                        codeSystemDefinition = getContext().getResourceDefinition("CodeSystem");
                        assert codeSystemDefinition != null;
                        myCodeSystemUrlValueChild = codeSystemDefinition.getChildByName("url");

                        BaseRuntimeElementCompositeDefinition<?> capabilityStatementDefinition =
                                        getContext().getResourceDefinition("CapabilityStatement");
                        BaseRuntimeChildDefinition capabilityStatementRestChild =
                                        capabilityStatementDefinition.getChildByName("rest");
                        BaseRuntimeElementCompositeDefinition<?> capabilityStatementRestDefinition =
                                        (BaseRuntimeElementCompositeDefinition<?>) capabilityStatementRestChild.getChildByName("rest");
                        BaseRuntimeChildDefinition capabilityStatementRestSecurityValueChild =
                                        capabilityStatementRestDefinition.getChildByName("security");
                        BaseRuntimeElementCompositeDefinition<?> capabilityStatementRestSecurityDefinition =
                                        (BaseRuntimeElementCompositeDefinition<?>)
                                                        capabilityStatementRestSecurityValueChild.getChildByName("security");
                        myCapabilityStatementRestSecurityServiceValueChild =
                                        capabilityStatementRestSecurityDefinition.getChildByName("service");
                }

                // R4B+
                if (getContext().getVersion().getVersion().isEqualOrNewerThan(FhirVersionEnum.R4B)) {

                        BaseRuntimeElementCompositeDefinition<?> codeableReferenceDef =
                                        (BaseRuntimeElementCompositeDefinition<?>) getContext().getElementDefinition("CodeableReference");
                        myCodeableReferenceConcept = codeableReferenceDef.getChildByName("concept");
                        myCodeableReferenceReference = codeableReferenceDef.getChildByName("reference");
                }
        }

        @FunctionalInterface
        public interface IValueExtractor {

                List<? extends IBase> get() throws FHIRException;
        }

        @FunctionalInterface
        private interface IExtractor<T> {

                void extract(
                                SearchParamSet<T> theParams,
                                RuntimeSearchParam theSearchParam,
                                IBase theValue,
                                String thePath,
                                boolean theWantLocalReferences);
        }

        /**
         * Note that this should only be called for R4+ servers. Prior to
         * R4 the paths could be separated by the word "or" or by a "|"
         * character, so we used a slower splitting mechanism.
         */
        @Nonnull
        public static String[] splitPathsR4(@Nonnull String thePaths) {
                StringTokenizer tok = new StringTokenizer(thePaths, " |");
                tok.setTrimmerMatcher(new StringTrimmingTrimmerMatcher());
                return tok.getTokenArray();
        }

        public static boolean tokenTextIndexingEnabledForSearchParam(
                        StorageSettings theStorageSettings, RuntimeSearchParam theSearchParam) {
                Optional<Boolean> noSuppressForSearchParam =
                                theSearchParam.getExtensions(HapiExtensions.EXT_SEARCHPARAM_TOKEN_SUPPRESS_TEXT_INDEXING).stream()
                                                .map(IBaseExtension::getValue)
                                                .map(val -> (IPrimitiveType<?>) val)
                                                .map(IPrimitiveType::getValueAsString)
                                                .map(Boolean::parseBoolean)
                                                .findFirst();

                // if the SP doesn't care, use the system default.
                if (!noSuppressForSearchParam.isPresent()) {
                        return !theStorageSettings.isSuppressStringIndexingInTokens();
                        // If the SP does care, use its value.
                } else {
                        boolean suppressForSearchParam = noSuppressForSearchParam.get();
                        ourLog.trace("Text indexing for SearchParameter {}: {}", theSearchParam.getName(), suppressForSearchParam);
                        return !suppressForSearchParam;
                }
        }

        private static void addIgnoredType(FhirContext theCtx, String theType, Set<String> theIgnoredTypes) {
                BaseRuntimeElementDefinition<?> elementDefinition = theCtx.getElementDefinition(theType);
                if (elementDefinition != null) {
                        theIgnoredTypes.add(elementDefinition.getName());
                }
        }

        protected static String extractValueAsString(BaseRuntimeChildDefinition theChildDefinition, IBase theElement) {
                return theChildDefinition
                                .getAccessor()
                                .<IPrimitiveType<?>>getFirstValueOrNull(theElement)
                                .map(IPrimitiveType::getValueAsString)
                                .orElse(null);
        }

        protected static Date extractValueAsDate(BaseRuntimeChildDefinition theChildDefinition, IBase theElement) {
                return theChildDefinition
                                .getAccessor()
                                .<IPrimitiveType<Date>>getFirstValueOrNull(theElement)
                                .map(IPrimitiveType::getValue)
                                .orElse(null);
        }

        protected static BigDecimal extractValueAsBigDecimal(
                        BaseRuntimeChildDefinition theChildDefinition, IBase theElement) {
                return theChildDefinition
                                .getAccessor()
                                .<IPrimitiveType<BigDecimal>>getFirstValueOrNull(theElement)
                                .map(IPrimitiveType::getValue)
                                .orElse(null);
        }

        @SuppressWarnings("unchecked")
        protected static List<IPrimitiveType<Date>> extractValuesAsFhirDates(
                        BaseRuntimeChildDefinition theChildDefinition, IBase theElement) {
                return (List) theChildDefinition.getAccessor().getValues(theElement);
        }

        protected static List<String> extractValuesAsStrings(
                        BaseRuntimeChildDefinition theChildDefinition, IBase theValue) {
                return theChildDefinition.getAccessor().getValues(theValue).stream()
                                .map(t -> (IPrimitiveType) t)
                                .map(IPrimitiveType::getValueAsString)
                                .filter(StringUtils::isNotBlank)
                                .collect(Collectors.toList());
        }

        protected static <T extends Enum<?>> String extractSystem(IBaseEnumeration<T> theBoundCode) {
                if (theBoundCode.getValue() != null) {
                        return theBoundCode.getEnumFactory().toSystem(theBoundCode.getValue());
                }
                return null;
        }

        private class ResourceLinkExtractor implements IExtractor<PathAndRef> {

                private PathAndRef myPathAndRef = null;

                @Override
                public void extract(
                                SearchParamSet<PathAndRef> theParams,
                                RuntimeSearchParam theSearchParam,
                                IBase theValue,
                                String thePath,
                                boolean theWantLocalReferences) {
                        if (theValue instanceof IBaseResource) {
                                myPathAndRef = new PathAndRef(theSearchParam.getName(), thePath, (IBaseResource) theValue);
                                theParams.add(myPathAndRef);
                                return;
                        }

                        String nextType = toRootTypeName(theValue);
                        switch (nextType) {
                                case "uri":
                                case "canonical":
                                        String typeName = toTypeName(theValue);
                                        IPrimitiveType<?> valuePrimitive = (IPrimitiveType<?>) theValue;
                                        IBaseReference fakeReference = (IBaseReference)
                                                        myContext.getElementDefinition("Reference").newInstance();
                                        fakeReference.setReference(valuePrimitive.getValueAsString());

                                        // Canonical has a root type of "uri"
                                        if ("canonical".equals(typeName)) {

                                                /*
                                                 * See #1583
                                                 * Technically canonical fields should not allow local references (e.g.
                                                 * Questionnaire/123) but it seems reasonable for us to interpret a canonical
                                                 * containing a local reference for what it is, and allow people to search
                                                 * based on that.
                                                 */
                                                IIdType parsed = fakeReference.getReferenceElement();
                                                if (parsed.hasIdPart() && parsed.hasResourceType() && !parsed.isAbsolute()) {
                                                        myPathAndRef = new PathAndRef(theSearchParam.getName(), thePath, fakeReference, false);
                                                        theParams.add(myPathAndRef);
                                                        break;
                                                }

                                                if (parsed.isAbsolute()) {
                                                        myPathAndRef = new PathAndRef(theSearchParam.getName(), thePath, fakeReference, true);
                                                        theParams.add(myPathAndRef);
                                                        break;
                                                }
                                        }

                                        theParams.addWarning("Ignoring canonical reference (indexing canonical is not yet supported)");
                                        break;
                                case "reference":
                                case "Reference":
                                        IBaseReference valueRef = (IBaseReference) theValue;
                                        extractResourceLinkFromReference(
                                                        theParams, theSearchParam, thePath, theWantLocalReferences, valueRef);
                                        break;
                                case "CodeableReference":
                                        Optional<IBase> referenceOpt =
                                                        myCodeableReferenceReference.getAccessor().getFirstValueOrNull(theValue);
                                        if (referenceOpt.isPresent()) {
                                                IBaseReference value = (IBaseReference) referenceOpt.get();
                                                extractResourceLinkFromReference(
                                                                theParams, theSearchParam, thePath, theWantLocalReferences, value);
                                        }
                                        break;
                                default:
                                        addUnexpectedDatatypeWarning(theParams, theSearchParam, theValue, thePath);
                                        break;
                        }
                }

                private void extractResourceLinkFromReference(
                                SearchParamSet<PathAndRef> theParams,
                                RuntimeSearchParam theSearchParam,
                                String thePath,
                                boolean theWantLocalReferences,
                                IBaseReference valueRef) {
                        IIdType nextId = valueRef.getReferenceElement();
                        if (nextId.isEmpty() && valueRef.getResource() != null) {
                                nextId = valueRef.getResource().getIdElement();
                        }

                        if (nextId == null || nextId.isEmpty()) {
                                // Ignore placeholder references that are blank
                        } else if (!theWantLocalReferences && nextId.getValue().startsWith("#")) {
                                // Ignore local refs unless we specifically want them
                        } else {
                                myPathAndRef = new PathAndRef(theSearchParam.getName(), thePath, valueRef, false);
                                theParams.add(myPathAndRef);
                        }
                }

                public PathAndRef get(IBase theValue, String thePath) {
                        extract(
                                        new SearchParamSet<>(),
                                        new RuntimeSearchParam(null, null, "Reference", null, null, null, null, null, null, null),
                                        theValue,
                                        thePath,
                                        false);
                        return myPathAndRef;
                }
        }

        private class DateExtractor implements IExtractor<ResourceIndexedSearchParamDate> {

                final String myResourceType;
                ResourceIndexedSearchParamDate myIndexedSearchParamDate = null;

                public DateExtractor(IBaseResource theResource) {
                        this(toRootTypeName(theResource));
                }

                public DateExtractor(String theResourceType) {
                        myResourceType = theResourceType;
                }

                @Override
                public void extract(
                                SearchParamSet theParams,
                                RuntimeSearchParam theSearchParam,
                                IBase theValue,
                                String thePath,
                                boolean theWantLocalReferences) {
                        String nextType = toRootTypeName(theValue);
                        switch (nextType) {
                                case "date":
                                case "dateTime":
                                case "instant":
                                        addDateTimeTypes(myResourceType, theParams, theSearchParam, theValue);
                                        break;
                                case "Period":
                                        addDate_Period(myResourceType, theParams, theSearchParam, theValue);
                                        break;
                                case "Timing":
                                        addDate_Timing(myResourceType, theParams, theSearchParam, theValue);
                                        break;
                                case "string":
                                        // CarePlan.activitydate can be a string - ignored for now
                                        break;
                                case "Quantity":
                                        // Condition.onset[x] can have a Quantity - Ignored for now
                                        break;
                                case "Range":
                                        // Condition.onset[x] can have a Range - Ignored for now
                                        break;
                                default:
                                        addUnexpectedDatatypeWarning(theParams, theSearchParam, theValue, thePath);
                                        break;
                        }
                }

                private void addDate_Period(
                                String theResourceType,
                                Set<ResourceIndexedSearchParamDate> theParams,
                                RuntimeSearchParam theSearchParam,
                                IBase theValue) {
                        Date start = extractValueAsDate(myPeriodStartValueChild, theValue);
                        String startAsString = extractValueAsString(myPeriodStartValueChild, theValue);
                        Date end = extractValueAsDate(myPeriodEndValueChild, theValue);
                        String endAsString = extractValueAsString(myPeriodEndValueChild, theValue);

                        if (start != null || end != null) {

                                if (start == null) {
                                        start = myStorageSettings.getPeriodIndexStartOfTime().getValue();
                                        startAsString =
                                                        myStorageSettings.getPeriodIndexStartOfTime().getValueAsString();
                                }
                                if (end == null) {
                                        end = myStorageSettings.getPeriodIndexEndOfTime().getValue();
                                        endAsString = myStorageSettings.getPeriodIndexEndOfTime().getValueAsString();
                                }

                                myIndexedSearchParamDate = new ResourceIndexedSearchParamDate(
                                                myPartitionSettings,
                                                theResourceType,
                                                theSearchParam.getName(),
                                                start,
                                                startAsString,
                                                end,
                                                endAsString,
                                                startAsString);
                                theParams.add(myIndexedSearchParamDate);
                        }
                }

                private void addDate_Timing(
                                String theResourceType,
                                Set<ResourceIndexedSearchParamDate> theParams,
                                RuntimeSearchParam theSearchParam,
                                IBase theValue) {
                        List<IPrimitiveType<Date>> values = extractValuesAsFhirDates(myTimingEventValueChild, theValue);

                        TreeSet<Date> dates = new TreeSet<>();
                        String firstValue = null;
                        String finalValue = null;
                        for (IPrimitiveType<Date> nextEvent : values) {
                                if (nextEvent.getValue() != null) {
                                        dates.add(nextEvent.getValue());
                                        if (firstValue == null) {
                                                firstValue = nextEvent.getValueAsString();
                                        }
                                        finalValue = nextEvent.getValueAsString();
                                }
                        }

                        Optional<IBase> repeat = myTimingRepeatValueChild.getAccessor().getFirstValueOrNull(theValue);
                        if (repeat.isPresent()) {
                                Optional<IBase> bounds =
                                                myTimingRepeatBoundsValueChild.getAccessor().getFirstValueOrNull(repeat.get());
                                if (bounds.isPresent()) {
                                        String boundsType = toRootTypeName(bounds.get());
                                        if ("Period".equals(boundsType)) {
                                                Date start = extractValueAsDate(myPeriodStartValueChild, bounds.get());
                                                Date end = extractValueAsDate(myPeriodEndValueChild, bounds.get());
                                                if (start != null) {
                                                        dates.add(start);
                                                }
                                                if (end != null) {
                                                        dates.add(end);
                                                }
                                        }
                                }
                        }

                        if (!dates.isEmpty()) {
                                myIndexedSearchParamDate = new ResourceIndexedSearchParamDate(
                                                myPartitionSettings,
                                                theResourceType,
                                                theSearchParam.getName(),
                                                dates.first(),
                                                firstValue,
                                                dates.last(),
                                                finalValue,
                                                firstValue);
                                theParams.add(myIndexedSearchParamDate);
                        }
                }

                @SuppressWarnings("unchecked")
                private void addDateTimeTypes(
                                String theResourceType,
                                Set<ResourceIndexedSearchParamDate> theParams,
                                RuntimeSearchParam theSearchParam,
                                IBase theValue) {
                        IPrimitiveType<Date> nextBaseDateTime = (IPrimitiveType<Date>) theValue;
                        if (nextBaseDateTime.getValue() != null) {
                                myIndexedSearchParamDate = new ResourceIndexedSearchParamDate(
                                                myPartitionSettings,
                                                theResourceType,
                                                theSearchParam.getName(),
                                                nextBaseDateTime.getValue(),
                                                nextBaseDateTime.getValueAsString(),
                                                nextBaseDateTime.getValue(),
                                                nextBaseDateTime.getValueAsString(),
                                                nextBaseDateTime.getValueAsString());
                                ourLog.trace("DateExtractor - extracted {} for {}", nextBaseDateTime, theSearchParam.getName());
                                theParams.add(myIndexedSearchParamDate);
                        }
                }

                public ResourceIndexedSearchParamDate get(IBase theValue, String thePath, boolean theWantLocalReferences) {
                        extract(
                                        new SearchParamSet<>(),
                                        new RuntimeSearchParam(null, null, "date", null, null, null, null, null, null, null),
                                        theValue,
                                        thePath,
                                        theWantLocalReferences);
                        return myIndexedSearchParamDate;
                }
        }

        private class TokenExtractor implements IExtractor<BaseResourceIndexedSearchParam> {
                private final String myResourceTypeName;
                private final String myUseSystem;

                public TokenExtractor(String theResourceTypeName, String theUseSystem) {
                        myResourceTypeName = theResourceTypeName;
                        myUseSystem = theUseSystem;
                }

                @Override
                public void extract(
                                SearchParamSet<BaseResourceIndexedSearchParam> params,
                                RuntimeSearchParam searchParam,
                                IBase value,
                                String path,
                                boolean theWantLocalReferences) {

                        // DSTU3+
                        if (value instanceof IBaseEnumeration<?>) {
                                IBaseEnumeration<?> obj = (IBaseEnumeration<?>) value;
                                String system = extractSystem(obj);
                                String code = obj.getValueAsString();
                                BaseSearchParamExtractor.this.createTokenIndexIfNotBlankAndAdd(
                                                myResourceTypeName, params, searchParam, system, code);
                                return;
                        }

                        // DSTU2 only
                        if (value instanceof BoundCodeDt) {
                                BoundCodeDt boundCode = (BoundCodeDt) value;
                                Enum valueAsEnum = boundCode.getValueAsEnum();
                                String system = null;
                                if (valueAsEnum != null) {
                                        //noinspection unchecked
                                        system = boundCode.getBinder().toSystemString(valueAsEnum);
                                }
                                String code = boundCode.getValueAsString();
                                BaseSearchParamExtractor.this.createTokenIndexIfNotBlankAndAdd(
                                                myResourceTypeName, params, searchParam, system, code);
                                return;
                        }

                        if (value instanceof IPrimitiveType) {
                                IPrimitiveType<?> nextValue = (IPrimitiveType<?>) value;
                                String systemAsString = null;
                                String valueAsString = nextValue.getValueAsString();
                                if ("CodeSystem.concept.code".equals(path)) {
                                        systemAsString = myUseSystem;
                                } else if ("ValueSet.codeSystem.concept.code".equals(path)) {
                                        systemAsString = myUseSystem;
                                }

                                if (value instanceof IIdType) {
                                        valueAsString = ((IIdType) value).getIdPart();
                                }

                                BaseSearchParamExtractor.this.createTokenIndexIfNotBlankAndAdd(
                                                myResourceTypeName, params, searchParam, systemAsString, valueAsString);
                                return;
                        }

                        switch (path) {
                                case "Patient.communication":
                                        BaseSearchParamExtractor.this.addToken_PatientCommunication(
                                                        myResourceTypeName, params, searchParam, value);
                                        return;
                                case "Consent.source":
                                        // Consent#source-identifier has a path that isn't typed - This is a one-off to deal with that
                                        return;
                                case "Location.position":
                                        BaseSearchParamExtractor.this.addCoords_Position(myResourceTypeName, params, searchParam, value);
                                        return;
                                case "StructureDefinition.context":
                                        // TODO: implement this
                                        ourLog.warn("StructureDefinition context indexing not currently supported");
                                        return;
                                case "CapabilityStatement.rest.security":
                                        BaseSearchParamExtractor.this.addToken_CapabilityStatementRestSecurity(
                                                        myResourceTypeName, params, searchParam, value);
                                        return;
                        }

                        String nextType = BaseSearchParamExtractor.this.toRootTypeName(value);
                        switch (nextType) {
                                case "Identifier":
                                        addToken_Identifier(myResourceTypeName, params, searchParam, value);
                                        break;
                                case "CodeableConcept":
                                        addToken_CodeableConcept(myResourceTypeName, params, searchParam, value);
                                        break;
                                case "CodeableReference":
                                        addToken_CodeableReference(myResourceTypeName, params, searchParam, value);
                                        break;
                                case "Coding":
                                        addToken_Coding(myResourceTypeName, params, searchParam, value);
                                        break;
                                case "ContactPoint":
                                        addToken_ContactPoint(myResourceTypeName, params, searchParam, value);
                                        break;
                                case "Range":
                                        // Group.characteristic.value[x] can have a Range - Ignored for now
                                        break;
                                case "Quantity":
                                        // Group.characteristic.value[x] can have a Quantity - Ignored for now
                                        break;
                                default:
                                        addUnexpectedDatatypeWarning(params, searchParam, value, path);
                                        break;
                        }
                }
        }

        /**
         * Extractor that delegates to two other extractors.
         *
         * @param <T> the type (currently only used for Numeric)
         */
        private static class MultiplexExtractor<T> implements IExtractor<T> {

                private final IExtractor<T> myExtractor0;
                private final IExtractor<T> myExtractor1;

                private MultiplexExtractor(IExtractor<T> theExtractor0, IExtractor<T> theExtractor1) {
                        myExtractor0 = theExtractor0;
                        myExtractor1 = theExtractor1;
                }

                @Override
                public void extract(
                                SearchParamSet<T> theParams,
                                RuntimeSearchParam theSearchParam,
                                IBase theValue,
                                String thePath,
                                boolean theWantLocalReferences) {
                        myExtractor0.extract(theParams, theSearchParam, theValue, thePath, theWantLocalReferences);
                        myExtractor1.extract(theParams, theSearchParam, theValue, thePath, theWantLocalReferences);
                }
        }
}