com.google.common.collect.ForwardingQueue Maven / Gradle / Ivy
/*
* Copyright (C) 2007 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 com.google.common.collect;
import com.google.common.annotations.GwtCompatible;
import java.util.Queue;
/**
* A queue which forwards all its method calls to another queue. Subclasses
* should override one or more methods to modify the behavior of the backing
* queue as desired per the decorator pattern.
*
* @author Mike Bostock
* @since 2 (imported from Google Collections Library)
*/
@GwtCompatible
public abstract class ForwardingQueue extends ForwardingCollection
implements Queue {
/** Constructor for use by subclasses. */
protected ForwardingQueue() {}
@Override protected abstract Queue delegate();
public boolean offer(E o) {
return delegate().offer(o);
}
public E poll() {
return delegate().poll();
}
public E remove() {
return delegate().remove();
}
public E peek() {
return delegate().peek();
}
public E element() {
return delegate().element();
}
}