org.springframework.data.redis.connection.convert.SetConverter 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.HashSet;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.stream.Collectors;
import org.springframework.core.convert.converter.Converter;
import org.springframework.util.Assert;
/**
* Converts a Set of values of one type to a Set of values of another type
*
* @author Jennifer Hickey
* @author Christoph Strobl
* @param The type of elements in the Set to convert
* @param The type of elements in the converted Set
*/
public class SetConverter implements Converter, Set> {
private Converter itemConverter;
/**
* @param itemConverter The {@link Converter} to use for converting individual Set items. Must not be {@literal null}.
*/
public SetConverter(Converter itemConverter) {
Assert.notNull(itemConverter, "ItemConverter must not be null!");
this.itemConverter = itemConverter;
}
/*
* (non-Javadoc)
* @see org.springframework.core.convert.converter.Converter#convert(Object)
*/
@Override
public Set convert(Set source) {
return source.stream().map(itemConverter::convert)
.collect(Collectors.toCollection(source instanceof LinkedHashSet ? LinkedHashSet::new : HashSet::new));
}
}