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Buession Framework Core
There is a newer version: 2.3.3
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional information regarding copyright ownership.
 * The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and limitations under the License.
 *
 * =========================================================================================================
 *
 * This software consists of voluntary contributions made by many individuals on behalf of the
 * Apache Software Foundation. For more information on the Apache Software Foundation, please see
 * .
 *
 * +-------------------------------------------------------------------------------------------------------+
 * | License: http://www.apache.org/licenses/LICENSE-2.0.txt 										       |
 * | Author: Yong.Teng  													       |
 * | Copyright @ 2013-2021 Buession.com Inc.														       |
 * +-------------------------------------------------------------------------------------------------------+
 */
package com.buession.core.converter;

import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * Map 转换器
 *
 * @param 
 * 		Map 原 key 类型
 * @param 
 * 		Map 原 value 类型
 * @param 
 * 		Map 目标 key 类型
 * @param 
 * 		Map 目标 value 类型
 *
 * @author Yong.Teng
 * @since 1.3.0
 */
public class MapConverter implements Converter, Map> {

	/**
	 * Map key 转换器
	 */
	private Converter keyConverter;

	/**
	 * Map value 转换器
	 */
	private Converter valueConverter;

	/**
	 * 构造函数
	 *
	 * @param keyConverter
	 * 		Map key 转换器
	 * @param valueConverter
	 * 		Map value 转换器
	 */
	public MapConverter(final Converter keyConverter, final Converter valueConverter){
		this.keyConverter = keyConverter;
		this.valueConverter = valueConverter;
	}

	@Override
	public Map convert(final Map source){
		if(source == null){
			return null;
		}else{
			return source.entrySet().stream().collect(Collectors.toMap(e->keyConverter.convert(e.getKey()),
					e->valueConverter.convert(e.getValue()), (a, b)->a, source instanceof LinkedHashMap ?
							LinkedHashMap::new : HashMap::new));
		}
	}

}