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/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Copyright (C) 2017 Amdocs
* =============================================================================
* 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.
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
* ============LICENSE_END=========================================================
*/
package org.onap.appc.dg.common.utils;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.io.Reader;
import java.util.*;
public class JSONUtil {
private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
public static <T> T fromJson(String json, Class<T> clazz) {
try {
return OBJECT_MAPPER.readValue(json, clazz);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static <T> T fromJson(Reader reader, Class<T> clazz) {
try {
return OBJECT_MAPPER.readValue(reader, clazz);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static String toJson(Object object) {
try {
return OBJECT_MAPPER.writeValueAsString(object);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static Map<String,String> extractPlainValues(String json, String ... names) {
if (null == names) return Collections.emptyMap();
Map<String,String> values = new HashMap<>();
try {
final JsonNode jsonNode = OBJECT_MAPPER.readTree(json);
for (String name : names) {
values.put(name, jsonNode.path(name).asText());
}
} catch (IOException e) {
throw new RuntimeException(e);
}
return values;
}
}
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