001/*-
002 * #%L
003 * HAPI FHIR Subscription Server
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.jpa.topic;
021
022import ca.uhn.fhir.jpa.searchparam.matcher.InMemoryMatchResult;
023import ca.uhn.fhir.jpa.subscription.model.ResourceModifiedMessage;
024import ca.uhn.fhir.jpa.util.MemoryCacheService;
025import org.hl7.fhir.instance.model.api.IBaseResource;
026import org.hl7.fhir.r5.model.SubscriptionTopic;
027
028import java.util.List;
029
030public class SubscriptionTopicMatcher {
031        private final SubscriptionTopicSupport mySubscriptionTopicSupport;
032        private final SubscriptionTopic myTopic;
033        private final MemoryCacheService myMemoryCacheService;
034
035        public SubscriptionTopicMatcher(
036                        SubscriptionTopicSupport theSubscriptionTopicSupport,
037                        SubscriptionTopic theTopic,
038                        MemoryCacheService memoryCacheService) {
039                mySubscriptionTopicSupport = theSubscriptionTopicSupport;
040                myTopic = theTopic;
041                myMemoryCacheService = memoryCacheService;
042        }
043
044        public InMemoryMatchResult match(ResourceModifiedMessage theMsg) {
045                IBaseResource resource = theMsg.getPayload(mySubscriptionTopicSupport.getFhirContext());
046                String resourceName = resource.fhirType();
047
048                List<SubscriptionTopic.SubscriptionTopicResourceTriggerComponent> triggers = myTopic.getResourceTrigger();
049                for (SubscriptionTopic.SubscriptionTopicResourceTriggerComponent next : triggers) {
050                        if (resourceName.equals(next.getResource())) {
051                                SubscriptionTriggerMatcher matcher =
052                                                new SubscriptionTriggerMatcher(mySubscriptionTopicSupport, theMsg, next, myMemoryCacheService);
053                                InMemoryMatchResult result = matcher.match();
054                                if (result.matched()) {
055                                        // as soon as one trigger matches, we're done
056                                        return result;
057                                }
058                        }
059                }
060                return InMemoryMatchResult.noMatch();
061        }
062}