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001/* 002 * #%L 003 * HAPI FHIR JPA 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.util.jsonpatch; 021 022import ca.uhn.fhir.context.FhirContext; 023import ca.uhn.fhir.i18n.Msg; 024import ca.uhn.fhir.parser.DataFormatException; 025import ca.uhn.fhir.parser.IParser; 026import ca.uhn.fhir.parser.StrictErrorHandler; 027import ca.uhn.fhir.rest.server.exceptions.InvalidRequestException; 028import com.fasterxml.jackson.core.JsonFactory; 029import com.fasterxml.jackson.core.JsonParser; 030import com.fasterxml.jackson.databind.JsonNode; 031import com.fasterxml.jackson.databind.ObjectMapper; 032import com.github.fge.jsonpatch.JsonPatch; 033import com.github.fge.jsonpatch.JsonPatchException; 034import org.hl7.fhir.instance.model.api.IBaseResource; 035import org.intellij.lang.annotations.Language; 036 037import java.io.IOException; 038 039import static org.apache.commons.lang3.StringUtils.defaultString; 040 041public class JsonPatchUtils { 042 043 public static <T extends IBaseResource> T apply( 044 FhirContext theCtx, T theResourceToUpdate, @Language("JSON") String thePatchBody) { 045 // Parse the patch 046 ObjectMapper mapper = new ObjectMapper(); 047 mapper.configure(JsonParser.Feature.INCLUDE_SOURCE_IN_LOCATION, false); 048 049 JsonFactory factory = mapper.getFactory(); 050 051 final JsonPatch patch; 052 try { 053 com.fasterxml.jackson.core.JsonParser parser = factory.createParser(thePatchBody); 054 JsonNode jsonPatchNode = mapper.readTree(parser); 055 patch = JsonPatch.fromJson(jsonPatchNode); 056 057 JsonNode originalJsonDocument = 058 mapper.readTree(theCtx.newJsonParser().encodeResourceToString(theResourceToUpdate)); 059 JsonNode after = patch.apply(originalJsonDocument); 060 061 @SuppressWarnings("unchecked") 062 Class<T> clazz = (Class<T>) theResourceToUpdate.getClass(); 063 064 String postPatchedContent = mapper.writeValueAsString(after); 065 066 IParser fhirJsonParser = theCtx.newJsonParser(); 067 fhirJsonParser.setParserErrorHandler(new StrictErrorHandler()); 068 069 T retVal; 070 try { 071 retVal = fhirJsonParser.parseResource(clazz, postPatchedContent); 072 } catch (DataFormatException e) { 073 String resourceId = theResourceToUpdate 074 .getIdElement() 075 .toUnqualifiedVersionless() 076 .getValue(); 077 String resourceType = theCtx.getResourceType(theResourceToUpdate); 078 resourceId = defaultString(resourceId, resourceType); 079 String msg = theCtx.getLocalizer() 080 .getMessage(JsonPatchUtils.class, "failedToApplyPatch", resourceId, e.getMessage()); 081 throw new InvalidRequestException(Msg.code(818) + msg); 082 } 083 return retVal; 084 085 } catch (IOException | JsonPatchException theE) { 086 throw new InvalidRequestException(Msg.code(819) + theE.getMessage()); 087 } 088 } 089}