Java tutorial
/* * Copyright (C) ${project.inceptionYear} Lable (info@lable.nl) * * 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. */ package org.lable.rfc3881.auditlogger.serialization; import com.fasterxml.jackson.core.JsonParser; import com.fasterxml.jackson.core.ObjectCodec; import com.fasterxml.jackson.databind.DeserializationContext; import com.fasterxml.jackson.databind.JsonDeserializer; import com.fasterxml.jackson.databind.JsonNode; import org.lable.codesystem.codereference.CodeReference; import java.io.IOException; /** * Deserialize CodeReference representations from JSON. */ public class CodeReferenceDeserializer extends JsonDeserializer<CodeReference> { @Override public CodeReference deserialize(JsonParser parser, DeserializationContext context) throws IOException { ObjectCodec oc = parser.getCodec(); JsonNode node = oc.readTree(parser); // Required fields. if (!node.has("cs") || !node.has("code") || !node.has("dn")) { return null; } String codeSystem = node.get("cs").asText(null); String code = node.get("code").asText(null); String displayName = node.get("dn").asText(null); // Optional fields, can be null. String codeSystemName = node.has("csn") ? node.get("csn").asText(null) : null; String originalText = node.has("ot") ? node.get("ot").asText(null) : null; return new CodeReference(codeSystem, codeSystemName, code, displayName, originalText); } }