manifold.collections.extensions.java.util.stream.Stream.ManifoldStreamCollectionsExt Maven / Gradle / Ivy
/*
* Copyright (c) 2018 - Manifold Systems LLC
*
* 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 manifold.collections.extensions.java.util.stream.Stream;
import java.util.function.Supplier;
import manifold.ext.rt.api.Expires;
import manifold.ext.rt.api.Extension;
import manifold.ext.rt.api.This;
import java.util.*;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.Stream;
@Extension
public class ManifoldStreamCollectionsExt
{
@Expires( 16 )
public static List toList(@This Stream thiz)
{
return thiz.collect(Collectors.toList());
}
/**
* @return A set containing all the elements from the stream, retaining the order of the elements visited.
*/
public static Set toSet(@This Stream thiz)
{
return thiz.collect( (Supplier>)LinkedHashSet::new, Set::add, Set::addAll);
}
public static Map toMap(@This Stream thiz, Function keyMapper, Function valueMapper)
{
return thiz.collect(Collectors.toMap(keyMapper, valueMapper));
}
public static Map toMap(@This Stream thiz, Function keyMapper)
{
return thiz.collect(Collectors.toMap(keyMapper, Function.identity()));
}
public static Map> groupingBy(@This Stream thiz, Function valueMapper)
{
return thiz.collect(Collectors.groupingBy(valueMapper));
}
}