001/*
002 * #%L
003 * HAPI FHIR - Client Framework
004 * %%
005 * Copyright (C) 2014 - 2024 Smile CDR, Inc.
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 *
011 * http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package ca.uhn.fhir.rest.client.method;
021
022import ca.uhn.fhir.context.ConfigurationException;
023import ca.uhn.fhir.context.FhirContext;
024import ca.uhn.fhir.i18n.Msg;
025import ca.uhn.fhir.rest.api.Constants;
026import ca.uhn.fhir.rest.api.SummaryEnum;
027import ca.uhn.fhir.rest.server.exceptions.InternalErrorException;
028import org.hl7.fhir.instance.model.api.IBaseResource;
029
030import java.lang.reflect.Method;
031import java.util.Collection;
032import java.util.Collections;
033import java.util.List;
034import java.util.Map;
035
036import static org.apache.commons.lang3.StringUtils.isNotBlank;
037
038public class ElementsParameter implements IParameter {
039
040        @SuppressWarnings("unchecked")
041        @Override
042        public void translateClientArgumentIntoQueryArgument(
043                        FhirContext theContext,
044                        Object theSourceClientArgument,
045                        Map<String, List<String>> theTargetQueryArguments,
046                        IBaseResource theTargetResource)
047                        throws InternalErrorException {
048                if (theSourceClientArgument instanceof Collection) {
049                        StringBuilder values = new StringBuilder();
050                        for (String next : (Collection<String>) theSourceClientArgument) {
051                                if (isNotBlank(next)) {
052                                        if (values.length() > 0) {
053                                                values.append(',');
054                                        }
055                                        values.append(next);
056                                }
057                        }
058                        theTargetQueryArguments.put(Constants.PARAM_ELEMENTS, Collections.singletonList(values.toString()));
059                } else {
060                        String elements = (String) theSourceClientArgument;
061                        if (elements != null) {
062                                theTargetQueryArguments.put(Constants.PARAM_ELEMENTS, Collections.singletonList(elements));
063                        }
064                }
065        }
066
067        @Override
068        public void initializeTypes(
069                        Method theMethod,
070                        Class<? extends Collection<?>> theOuterCollectionType,
071                        Class<? extends Collection<?>> theInnerCollectionType,
072                        Class<?> theParameterType) {
073                if (theOuterCollectionType != null) {
074                        throw new ConfigurationException(Msg.code(1445) + "Method '" + theMethod.getName() + "' in type '"
075                                        + theMethod.getDeclaringClass().getCanonicalName() + "' is of type " + SummaryEnum.class
076                                        + " but can not be a collection of collections");
077                }
078        }
079}