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package top.jfunc.json.impl;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ser.impl.SimpleFilterProvider;
import top.jfunc.json.Json;
import top.jfunc.json.JsonArray;
import top.jfunc.json.JsonException;
import top.jfunc.json.JsonObject;
import top.jfunc.json.strategy.ExcludeFilter;
import top.jfunc.json.strategy.FieldPropertyNamingStrategy;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @author xiongshiyan at 2018/6/10
 */
public class JSONObject extends BaseMapJSONObject {

    private static final ObjectMapper objectMapper = new ObjectMapper();

    public JSONObject(Map map){
        super(map);
    }
    public JSONObject(){
        super();
    }
    public JSONObject(String jsonString){
        super(jsonString);
    }

    @Override
    protected Map str2Map(String jsonString) {
        try {
            return objectMapper.readValue(jsonString , Map.class);
        } catch (IOException e) {
            throw new JsonException(e);
        }
    }

    @Override
    protected String map2Str(Map map) {
        try {
            return objectMapper.writeValueAsString(map);
        } catch (JsonProcessingException e) {
            throw new JsonException(e);
        }
    }

    @Override
    public JsonObject getJsonObject(String key) {
        assertKey(key);
        //这里不能使用getJSONObject,因为每一种Json实现不一样,给出的JsonObject类型是不一致的。
        //这里就是各种JsonObject不能混用的原因
        Object temp = this.map.get(key);
        Object t = checkNullValue(key, temp);

        if(t instanceof Map){
            return new JSONObject((Map) t);
        }

        return (JsonObject) t;
    }

    @Override
    public JsonArray getJsonArray(String key) {
        assertKey(key);
        //这里不能使用getJSONObject,因为每一种Json实现不一样,给出的JsonObject类型是不一致的。
        //这里就是各种JsonObject不能混用的原因
        Object temp = this.map.get(key);
        Object t = checkNullValue(key, temp);

        if(t instanceof List){
            return new JSONArray((List)t);
        }
        return (JsonArray) t;
    }


    @Override
    public JsonObject parse(String jsonString) {
        try {
            Map map = objectMapper.readValue(jsonString, Map.class);
            this.map = map;
            return this;
        } catch (IOException e) {
            throw new JsonException(e);
        }
    }

    @Override
    public  String serialize(T javaBean, boolean nullHold, String... ignoreFields) {
        try {
            ObjectMapper mapper = new ObjectMapper();
            //null值的处理
            if(!nullHold){
                mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
            }
            //需要在Bean上添加 @JsonFilter(ExcludeFilter.FILTER_NAME)
            ExcludeFilter excludeFilter = new ExcludeFilter(ignoreFields);
            SimpleFilterProvider provider = new SimpleFilterProvider().addFilter(ExcludeFilter.FILTER_NAME , excludeFilter);
            mapper.setPropertyNamingStrategy(new FieldPropertyNamingStrategy());
            return mapper.writer(provider).writeValueAsString(javaBean);
        } catch (JsonProcessingException e) {
            throw new JsonException(e);
        }
    }

    @Override
    public  T deserialize(String jsonString, Class clazz) {
        try {
            return objectMapper.readValue(jsonString , clazz);
        } catch (IOException e) {
            throw new JsonException(e);
        }
    }

    @Override
    public JsonObject fromMap(Map map) {
        return new JSONObject(map);
    }


    @Override
    public Json toJson(Object o) {
        if(o instanceof List){
            return new JSONArray((List) o);
        }
        if(o instanceof Map){
            return new JSONObject((Map) o);
        }
        try {
            return (Json) o;
        } catch (Exception e) {
            throw new JsonException("不能将非Json的对象转换为Json");
        }
    }
}