package com.ots.project.tool.exam;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
public class JsonUtil {
    private static final ObjectMapper MAPPER = new ObjectMapper();
    private static final Logger logger = LoggerFactory.getLogger(JsonUtil.class);
    public static <T> String toJsonStr(T o) {
        try {
            return MAPPER.writeValueAsString(o);
        } catch (JsonProcessingException e) {
            
        }
        return null;
    }
    public static <T> T toJsonObject(String json, Class<T> valueType) {
        try {
            return MAPPER.<T>readValue(json, valueType);
        } catch (IOException e) {
            
        }
        return null;
    }
    public static <T> List<T> toJsonListObject(String json, Class<T> valueType) {
        try {
            JavaType getCollectionType = MAPPER.getTypeFactory().constructParametricType(List.class, valueType);
            List<T> list = MAPPER.readValue(json, getCollectionType);
            return list;
        } catch (IOException e) {
            logger.error("异常：{}",e.getMessage(), e);
        }
        return null;
    }
    public static <T> T toJsonObject(InputStream stream, Class<T> valueType) {
        try {
            T object = MAPPER.<T>readValue(stream, valueType);
            return object;
        } catch (IOException e) {
            logger.error(e.getMessage(), e);
        }
        return null;
    }
    
    
    public static String toJSONString(Object object) {
        try {
            return JSONObject.toJSONString(object);
        } catch (Exception e) {
            return "";
        }
    }
    
    public static <T> T parseObject(String text, Class<T> clazz) {
        try {
            return JSONObject.parseObject(text, clazz);
        } catch (Exception e) {
            return null;
        }
    }
    
    public static <T> List<T> parseArray(String text, Class<T> clazz) {
        try {
            return JSONArray.parseArray(text, clazz);
        } catch (Exception e) {
            return null;
        }
    }
    
}