2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Copyright (C) 2017 Amdocs
8 * =============================================================================
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
13 * http://www.apache.org/licenses/LICENSE-2.0
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
21 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
22 * ============LICENSE_END=========================================================
25 package org.openecomp.appc.dg.common.utils;
27 import com.fasterxml.jackson.databind.JsonNode;
28 import com.fasterxml.jackson.databind.ObjectMapper;
30 import java.io.IOException;
31 import java.io.Reader;
35 public class JSONUtil {
37 private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
39 public static <T> T fromJson(String json, Class<T> clazz) {
42 return OBJECT_MAPPER.readValue(json, clazz);
43 } catch (IOException e) {
44 throw new RuntimeException(e);
48 public static <T> T fromJson(Reader reader, Class<T> clazz) {
51 return OBJECT_MAPPER.readValue(reader, clazz);
52 } catch (IOException e) {
53 throw new RuntimeException(e);
57 public static String toJson(Object object) {
60 return OBJECT_MAPPER.writeValueAsString(object);
61 } catch (IOException e) {
62 throw new RuntimeException(e);
66 public static Map<String,String> extractPlainValues(String json, String ... names) {
67 if (null == names) return Collections.emptyMap();
68 Map<String,String> values = new HashMap<>();
70 final JsonNode jsonNode = OBJECT_MAPPER.readTree(json);
71 for (String name : names) {
72 values.put(name, jsonNode.path(name).asText());
74 } catch (IOException e) {
75 throw new RuntimeException(e);