org.springframework.data.redis.connection.convert.MapConverter Maven / Gradle / Ivy
/*
* Copyright 2013-2018 the original author or authors.
*
* Licensed 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.
*/
package org.springframework.data.redis.connection.convert;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.stream.Collectors;
import org.apache.commons.collections.map.HashedMap;
import org.springframework.core.convert.converter.Converter;
/**
* Converts a Map of values of one key/value type to a Map of values of another type
*
* @author Jennifer Hickey
* @author Christoph Strobl
* @param The type of keys and values in the Map to convert
* @param The type of keys and values in the converted Map
*/
public class MapConverter implements Converter, Map> {
private Converter itemConverter;
/**
* @param itemConverter The {@link Converter} to use for converting individual Map keys and values. Must not be
* {@literal null}.
*/
public MapConverter(Converter itemConverter) {
this.itemConverter = itemConverter;
}
/*
* (non-Javadoc)
* @see org.springframework.core.convert.converter.Converter#convert(Object)
*/
@Override
public Map convert(Map source) {
return source.entrySet().stream()
.collect(Collectors.toMap(e -> itemConverter.convert(e.getKey()), e -> itemConverter.convert(e.getValue()),
(a, b) -> a, source instanceof LinkedHashMap ? LinkedHashMap::new : HashedMap::new));
}
}