package com.develop.util;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import net.sf.ezmorph.object.DateMorpher;

import net.sf.json.JSONArray;

import net.sf.json.JSONObject;

import net.sf.json.JSONSerializer;

import net.sf.json.JsonConfig;

import net.sf.json.util.CycleDetectionStrategy;

import net.sf.json.util.JSONUtils;

import net.sf.json.util.PropertyFilter;

public class JsonUtil {

    /**

     * 转成jsonOjbect对象

     * @param obj

     * @return

     */

    public static JSONObject toJsonOjbect(Object obj){

        JsonConfig jsonConfig = new JsonConfig();

        jsonConfig.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);//可防止hibernate模式下的关联关系子对象中包含父对象造成死循环

        JSONObject jsonObject = JSONObject.fromObject(obj,jsonConfig);

        return jsonObject;

    }

    /**

     * 转成jsonArray对象

     * @param obj

     * @return

     */

    public static JSONArray toJsonArray(Object obj){

        JsonConfig jsonConfig = new JsonConfig();

        jsonConfig.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);//可防止hibernate模式下的关联关系子对象中包含父对象造成死循环

        JSONArray jsonArray = JSONArray.fromObject(obj,jsonConfig);

        return jsonArray;

    }

    /**

     * json串或jsonobject对象转成Map

     * @param obj

     * @return

     */

    public static Map<?, ?> jsonToMap(Object obj){

        JSONObject jsonObject = null;

        if(obj instanceof JSONObject){

            jsonObject = (JSONObject)obj;

        }else{

            jsonObject = JSONObject.fromObject(obj);

        }

        Map<Object, Object> map = new HashMap<Object, Object>(jsonObject.size());

        Iterator<?> it = jsonObject.keys();

        while(it.hasNext()){

            Object key = it.next();

            Object value = jsonObject.get(key);

            if(value instanceof JSONObject){

                map.put(key, jsonToMap(value));

            }else if(value instanceof JSONArray){

                map.put(key, jsonArrToList(value));

            }else{

                map.put(key, value);

            }

        }

        return map;

    }

    /**

     * list串或jsonArray对象转成list

     * @param obj

     * @return

     */

    public static List<?> jsonArrToList(Object obj){

        JSONArray jsonArray = null;

        if(obj instanceof JSONArray){

            jsonArray = (JSONArray)obj;

        }else{

            jsonArray = JSONArray.fromObject(obj);

        }

        List list = new ArrayList(jsonArray.size());

        Iterator<?> it = jsonArray.iterator();

        while(it.hasNext()){

            Object next = it.next();

            if(next instanceof JSONObject){

                list.add(jsonToMap(next));

            }else if(next instanceof JSONArray){

                list.add(jsonArrToList(next));

            }else{

                list.add(next);

            }

        }

        return list;

    }

    /**

     * json串转java对象

     * @param jsonStr json串

     * @param rootClass 要转成的主对象

     * @param subClassMap 主对象中包含的list类型的属性Map 格式：subClassMap.put("iordersegments", IorderSegment.class); key是子对象在主对象中的属性名， value是子对象类型

     * @return

     */

    public static <T>T jsonToBean(String jsonStr,Class<T> rootClass,Map<String, Class> subClassMap){

        JsonConfig filterNullConfig = new JsonConfig();

        //过滤掉参数值为null的参数，防止后边的时间转换出错

        filterNullConfig.setJsonPropertyFilter(new PropertyFilter() {

            @Override

            public boolean apply(Object clazz, String name, Object value) {

                boolean isFilter = false;

                if(value==null||"".equals(value)){

                    isFilter = true;

                }

                return isFilter;

            }

        });

        JSONObject jsonObject = JSONObject.fromObject(jsonStr,filterNullConfig);

        String[] dateFormats = new String[] {"yyyy-MM-dd HH:mm:ss","yyyy-MM-dd","yyyy-MM-dd HH:mm"};//不过好像只有   yyyy-MM-dd HH:mm:ss 格式有效

        JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpher(dateFormats));

        JsonConfig jsonConfig = new JsonConfig();

        jsonConfig.setRootClass(rootClass);

        if(subClassMap!=null&&subClassMap.size()>0){

            jsonConfig.setClassMap(subClassMap);

        }

        return (T)JSONSerializer.toJava(jsonObject, jsonConfig);

    }

}