2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
21 package org.openecomp.mso.utils;
23 import java.io.IOException;
26 import com.fasterxml.jackson.annotation.JsonRootName;
27 import com.fasterxml.jackson.core.JsonParser;
28 import com.fasterxml.jackson.core.JsonProcessingException;
29 import com.fasterxml.jackson.databind.DeserializationContext;
30 import com.fasterxml.jackson.databind.JsonDeserializer;
31 import com.fasterxml.jackson.databind.JsonNode;
32 import com.fasterxml.jackson.databind.ObjectMapper;
35 * A JSON deserializer that ignores the root element if it is present.
37 public class RootIgnoringJsonDeserializer<T> extends JsonDeserializer<T> {
39 private final ObjectMapper mapper = new ObjectMapper();
40 private final Class<T> clazz;
41 private final String jsonRootName;
43 public RootIgnoringJsonDeserializer(Class<T> clazz) {
46 JsonRootName annotation = clazz.getAnnotation(JsonRootName.class);
48 if (annotation == null || annotation.value() == null || annotation.value().equals("")) {
49 jsonRootName = clazz.getSimpleName();
51 jsonRootName = annotation.value();
56 public T deserialize(JsonParser jp, DeserializationContext dc)
57 throws IOException, JsonProcessingException {
58 JsonNode rootNode = jp.getCodec().readTree(jp);
59 Map.Entry<String,JsonNode> field = rootNode.fields().next();
61 if (jsonRootName.equals(field.getKey())) {
62 rootNode = field.getValue();
65 return mapper.convertValue(rootNode, clazz);