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/*******************************************************************************
* Copyright 2016-2017 ZTE, Inc. and others.
*
* 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.onap.msb.apiroute.wrapper.util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
public class JacksonJsonUtil {
private static final Logger logger = LoggerFactory.getLogger(JacksonJsonUtil.class);
private volatile static ObjectMapper mapper = null;
private static ObjectMapper getMapperInstance() {
if (mapper == null) {
synchronized (JacksonJsonUtil.class) {
if (mapper == null) {
mapper = new ObjectMapper();
}
}
}
return mapper;
}
/**
* from java object to json
*
* @param obj
* @return json
* @throws Exception
*/
public static String beanToJson(Object obj) throws Exception {
String json = null;
ObjectMapper objectMapper = getMapperInstance();
objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
json = objectMapper.writeValueAsString(obj);
return json;
}
/**
* from json to java object
*
* @param json
* @param cls
* @return
* @throws Exception
*/
public static Object jsonToBean(String json, Class<?> cls) throws Exception {
Object vo = null;
try {
ObjectMapper objectMapper = getMapperInstance();
objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
vo = objectMapper.readValue(json, cls);
} catch (Exception e) {
logger.error(cls + " JsonTobean faild");
throw new Exception(cls + " JsonTobean faild");
}
return vo;
}
/**
* from json to java List
*
* @param json
* @return
* @throws Exception
*/
public static <T> T jsonToListBean(String json, TypeReference<T> valueTypeRef) {
try {
ObjectMapper objectMapper = getMapperInstance();
return objectMapper.readValue(json, valueTypeRef);
} catch (Exception e) {
String errorMsg = " JsonTobean faild:" + e.getMessage();
logger.error(errorMsg);
}
return null;
}
}
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