/*
* 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 com.facebook.presto.util;
import java.util.Collection;
import java.util.Map;
import java.util.function.BinaryOperator;
import java.util.stream.Stream;
import static java.util.stream.Collectors.toMap;
public final class MoreMaps
{
private MoreMaps() {}
public static <K, V> Map<K, V> mergeMaps(Map<K, V> map1, Map<K, V> map2, BinaryOperator<V> merger)
{
return Stream.of(map1, map2)
.map(Map::entrySet)
.flatMap(Collection::stream)
.collect(toMap(Map.Entry::getKey, Map.Entry::getValue, merger));
}
}