/**
 * Copyright 2016 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.sdclient.wrapper.util;

import java.util.List;
import java.util.Map;

import org.onap.msb.sdclient.core.CatalogService;
import org.onap.msb.sdclient.core.HealthService;
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 static ObjectMapper mapper;
	
	/**
	 * 获取ObjectMapper实例
	 * @param createNew 方式：true，新实例；false,存在的mapper实例
	 * @return
	 */
	public static synchronized ObjectMapper getMapperInstance() {   
       if (mapper == null) {   
            mapper = new ObjectMapper();   
        }   
        return mapper;   
    } 
	
	/**
	 * 将java对象转换成json字符串
	 * @param obj 准备转换的对象
	 * @return json字符串
	 * @throws Exception 
	 */
	public static String beanToJson(Object obj) throws Exception {
		String json=null;
		try {
			ObjectMapper objectMapper = getMapperInstance();
			 objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);  
			json =objectMapper.writeValueAsString(obj);
		} catch (Exception e) {
		    logger.error("Class beanToJson faild:"+e.getMessage());
			 throw new Exception("Class beanToJson faild:"+e.getMessage());
		}		
		return json;
	}
	
	
	
	/**
	 * 将json字符串转换成java对象
	 * @param json 准备转换的json字符串
	 * @param cls  准备转换的类
	 * @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:"+e.getMessage());
			throw new Exception(cls+" JsonTobean faild:"+e.getMessage());
		}	
		return vo;
	}
	
	
	
	   
    /**
     * 将json字符串转换成java集合对象
     * @param json 准备转换的json字符串
     * @param cls  准备转换的类
     * @return 
     * @throws Exception 
     */
    public static List<CatalogService> jsonToListBean(String json) {
        List<CatalogService> vo =null;
        try {
      
        ObjectMapper objectMapper = getMapperInstance();
    

         vo = objectMapper.readValue(json, new TypeReference<List<CatalogService>>() {});
        
        } catch (Exception e) {
            String errorMsg =" JsonTobean faild:"+e.getMessage();
            logger.error(errorMsg);
        }   
        return vo;
    }
    
    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;
    }
    
    
  
    
    
    /**
     * 将json字符串转换成java集合对象
     * @param json 准备转换的json字符串
     * @param cls  准备转换的类
     * @return 
     * @throws Exception 
     */
    public static Map<String,String[]> jsonToMapBean(String json) {
        Map<String,String[]> vo =null;
        try {
      
        ObjectMapper objectMapper = getMapperInstance();
    

         vo = objectMapper.readValue(json, new TypeReference<Map<String,String[]>>() {});
        
        } catch (Exception e) {
            String errorMsg =" JsonTobean faild";
            logger.error(errorMsg);
        }   
        return vo;
    }
    

    public static void main(String[] args) {
        String json="[{\"Node\":{\"Node\":\"A23179111\",\"Address\":\"10.74.44.27\",\"CreateIndex\":3,\"ModifyIndex\":318},\"Service\":{\"ID\":\"oo_10.74.56.36_5656\",\"Service\":\"oo\",\"Tags\":[\"url:/root\",\"protocol:REST\",\"version:\",\"visualRange:0|1\",\"ttl:-1\",\"status:1\",\"lb_policy:client_custom\",\"lb_server_params:weight=1 max_fails=1 fail_timeout=16s\",\"checkType:TCP\",\"checkInterval:10\",\"checkUrl:10.56.23.63:8989\"],\"Address\":\"10.74.56.36\",\"Port\":5656,\"EnableTagOverride\":false,\"CreateIndex\":314,\"ModifyIndex\":318},\"Checks\":[{\"Node\":\"A23179111\",\"CheckID\":\"serfHealth\",\"Name\":\"Serf Health Status\",\"Status\":\"passing\",\"Notes\":\"\",\"Output\":\"Agent alive and reachable\",\"ServiceID\":\"\",\"ServiceName\":\"\",\"CreateIndex\":3,\"ModifyIndex\":3},{\"Node\":\"A23179111\",\"CheckID\":\"service:oo_10.74.56.36_5656\",\"Name\":\"Service 'oo' check\",\"Status\":\"critical\",\"Notes\":\"\",\"Output\":\"\",\"ServiceID\":\"oo_10.74.56.36_5656\",\"ServiceName\":\"oo\",\"CreateIndex\":314,\"ModifyIndex\":318}]},{\"Node\":{\"Node\":\"A23179111\",\"Address\":\"10.74.44.27\",\"CreateIndex\":3,\"ModifyIndex\":318},\"Service\":{\"ID\":\"oo_10.78.36.36_111\",\"Service\":\"oo\",\"Tags\":[\"url:/root\",\"protocol:REST\",\"version:\",\"visualRange:0|1\",\"ttl:-1\",\"status:1\",\"lb_policy:client_custom\"],\"Address\":\"10.78.36.36\",\"Port\":111,\"EnableTagOverride\":false,\"CreateIndex\":315,\"ModifyIndex\":315},\"Checks\":[{\"Node\":\"A23179111\",\"CheckID\":\"serfHealth\",\"Name\":\"Serf Health Status\",\"Status\":\"passing\",\"Notes\":\"\",\"Output\":\"Agent alive and reachable\",\"ServiceID\":\"\",\"ServiceName\":\"\",\"CreateIndex\":3,\"ModifyIndex\":3}]}]";
        List<HealthService> list=jsonToListBean(json,new TypeReference<List<HealthService>>() {
        });
        System.out.println(list);
    
    }
   
	
	

}