com.google.gwt.emul.java.util.stream.CollectorImpl Maven / Gradle / Ivy
/*
* 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 implements Collector {
private final Supplier supplier;
private final BiConsumer accumulator;
private final Set characteristics;
private final BinaryOperator combiner;
private final Function finisher;
public CollectorImpl(
Supplier supplier,
BiConsumer accumulator,
BinaryOperator combiner,
Function finisher,
Characteristics... characteristics) {
this.supplier = supplier;
this.accumulator = accumulator;
this.characteristics = Collections.emptySet();
this.combiner = combiner;
this.finisher = finisher;
}
@Override
public Supplier supplier() {
return supplier;
}
@Override
public BiConsumer accumulator() {
return accumulator;
}
@Override
public BinaryOperator combiner() {
return combiner;
}
@Override
public Function finisher() {
return finisher;
}
@Override
public Set characteristics() {
return characteristics;
}
}