001/*
002 *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
003 *  <p>
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *  <p>
008 *  http://www.apache.org/licenses/LICENSE-2.0
009 *  <p>
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package com.mybatisflex.core.handler;
017
018import com.alibaba.fastjson2.JSON;
019import com.alibaba.fastjson2.JSONWriter;
020import com.alibaba.fastjson2.TypeReference;
021
022import java.lang.reflect.Type;
023import java.util.Collection;
024
025/**
026 * @author michael
027 */
028public class Fastjson2TypeHandler extends BaseJsonTypeHandler<Object> {
029
030    private final Class<?> propertyType;
031    private Class<?> genericType;
032    private Type type;
033
034    public Fastjson2TypeHandler(Class<?> propertyType) {
035        this.propertyType = propertyType;
036    }
037
038
039    public Fastjson2TypeHandler(Class<?> propertyType, Class<?> genericType) {
040        this.propertyType = propertyType;
041        this.genericType = genericType;
042        this.type = TypeReference.collectionType((Class<? extends Collection>) propertyType, genericType);
043    }
044
045    @Override
046    protected Object parseJson(String json) {
047        if (genericType != null && Collection.class.isAssignableFrom(propertyType)) {
048            return JSON.parseObject(json, type);
049        } else {
050            return JSON.parseObject(json, propertyType);
051        }
052    }
053
054    @Override
055    protected String toJson(Object object) {
056        return JSON.toJSONString(object
057            , JSONWriter.Feature.WriteMapNullValue
058            , JSONWriter.Feature.WriteNullListAsEmpty
059            , JSONWriter.Feature.WriteNullStringAsEmpty
060        );
061    }
062
063}