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package com.feingto.iot.server.serialize;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.feingto.iot.common.util.DateKit;

import java.text.SimpleDateFormat;
import java.util.TimeZone;

/**
 * Jackson ObjectMapper
 *
 * @author longfei
 */
public class JSONObjectMapper extends ObjectMapper {
    private static final long serialVersionUID = -2088277558896145073L;

    public JSONObjectMapper() {
        this.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);// 允许使用单引号(撇号,字符"\")引用的字符串(字符串名称和值)
        this.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);// 允许使用非挂牌字段名称
        this.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);// 空对象不抛异常
//        this.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, true);// 序列化枚举是以toString()来输出，默认false，即默认以name()来输出
//        this.configure(DeserializationFeature.READ_ENUMS_USING_TO_STRING, true);// 反序列化枚举是以toString()来输出，默认false，即默认以name()来输出
        this.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        this.configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true);
        this.configure(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT, true);
        this.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        this.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
    }

    /**
     * 日期格式按照"yyyy-MM-dd HH:mm:ss"序列化
     */
    public JSONObjectMapper useDateTime() {
        this.setDateFormat(new SimpleDateFormat(DateKit.DATE_TIME));
        this.setTimeZone(TimeZone.getDefault());
        return this;
    }

    /**
     * 日期格式按照ISO8601标准序列化, 使用UTC时间
     */
    public JSONObjectMapper useUTC() {
        this.setDateFormat(new SimpleDateFormat(DateKit.DATE_TIME_UTC));
        this.setTimeZone(TimeZone.getTimeZone("UTC"));
        return this;
    }
}