| /* |
| * Copyright 2016 Google Inc. |
| * |
| * 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 java.util.stream; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| import java.util.function.BiConsumer; |
| import java.util.function.BinaryOperator; |
| import java.util.function.Function; |
| import java.util.function.Supplier; |
| |
| /** |
| * Simple internal implementation of a collector, holding each of the functions in a field. |
| */ |
| final class CollectorImpl<T, A, R> implements Collector<T, A, R> { |
| private final Supplier<A> supplier; |
| private final BiConsumer<A, T> accumulator; |
| private final Set<Characteristics> characteristics; |
| private final BinaryOperator<A> combiner; |
| private final Function<A, R> finisher; |
| |
| public CollectorImpl( |
| Supplier<A> supplier, |
| BiConsumer<A, T> accumulator, |
| BinaryOperator<A> combiner, |
| Function<A, R> finisher, |
| Characteristics... characteristics) { |
| this.supplier = supplier; |
| this.accumulator = accumulator; |
| this.characteristics = Collections.emptySet(); |
| this.combiner = combiner; |
| this.finisher = finisher; |
| } |
| |
| @Override |
| public Supplier<A> supplier() { |
| return supplier; |
| } |
| |
| @Override |
| public BiConsumer<A, T> accumulator() { |
| return accumulator; |
| } |
| |
| @Override |
| public BinaryOperator<A> combiner() { |
| return combiner; |
| } |
| |
| @Override |
| public Function<A, R> finisher() { |
| return finisher; |
| } |
| |
| @Override |
| public Set<Characteristics> characteristics() { |
| return characteristics; |
| } |
| } |