/*
* @(#)$Id: codetemplate_xbird.xml 943 2006-09-13 07:03:37Z yui $
*
* Copyright 2006-2008 Makoto YUI
*
* 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.
*
* Contributors:
* Makoto YUI - initial implementation
*/
package xbird.util.concurrent.collections;
import java.util.Collection;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;
import xbird.util.iterator.EmptyIterator;
/**
*
* <DIV lang="en"></DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI (yuin405+xbird@gmail.com)
*/
public final class DisposableBlockingQueue<E> implements IDisposableBlockingQueue<E> {
private final BlockingQueue<E> _delegate;
private volatile boolean _disposed = false;
public DisposableBlockingQueue(BlockingQueue<E> delegate, E sentinel) {
this._delegate = delegate;
}
public static <E> DisposableBlockingQueue<E> of(BlockingQueue<E> delegate, E sentinel) {
return new DisposableBlockingQueue<E>(delegate, sentinel);
}
public boolean isDisposed() {
return _disposed;
}
public void dispose() {
if(!_disposed) {
this._disposed = true;
_delegate.clear();
}
}
// ------------------------------------------------------------------
// delegated methods
public boolean add(E e) {
if(_disposed) {
return false;
}
return _delegate.add(e);
}
public boolean addAll(Collection<? extends E> c) {
if(_disposed) {
return false;
}
return _delegate.addAll(c);
}
public boolean offer(E e, long timeout, TimeUnit unit) throws InterruptedException {
if(_disposed) {
return false;
}
return _delegate.offer(e, timeout, unit);
}
public boolean offer(E e) {
if(_disposed) {
return false;
}
return _delegate.offer(e);
}
public void put(E e) throws InterruptedException {
if(_disposed) {
return;
}
_delegate.put(e);
}
/**
* @return available?
*/
public boolean putIfAvailable(E e) throws InterruptedException {
if(_disposed) {
return false;
}
_delegate.put(e);
return true;
}
public E take() throws InterruptedException {
if(_disposed) {
throw new IllegalStateException("Blocking queue is already closed");
}
return _delegate.take();
}
public boolean contains(Object o) {
if(_disposed) {
return false;
}
return _delegate.contains(o);
}
public boolean containsAll(Collection<?> c) {
if(_disposed) {
return false;
}
return _delegate.containsAll(c);
}
public int drainTo(Collection<? super E> c, int maxElements) {
if(_disposed) {
return 0;
}
return _delegate.drainTo(c, maxElements);
}
public int drainTo(Collection<? super E> c) {
if(_disposed) {
return 0;
}
return _delegate.drainTo(c);
}
public E element() {
if(_disposed) {
throw new NoSuchElementException();
}
return _delegate.element();
}
public boolean isEmpty() {
if(_disposed) {
return true;
}
return _delegate.isEmpty();
}
public Iterator<E> iterator() {
if(_disposed) {
return EmptyIterator.emptyIterator();
}
return _delegate.iterator();
}
public E peek() {
if(_disposed) {
return null;
}
return _delegate.peek();
}
public E poll() {
if(_disposed) {
return null;
}
return _delegate.poll();
}
public E poll(long timeout, TimeUnit unit) throws InterruptedException {
if(_disposed) {
return null;
}
return _delegate.poll(timeout, unit);
}
public int remainingCapacity() {
if(_disposed) {
return 0;
}
return _delegate.remainingCapacity();
}
public E remove() {
if(_disposed) {
return null;
}
return _delegate.remove();
}
public boolean remove(Object o) {
if(_disposed) {
return false;
}
return _delegate.remove(o);
}
public boolean removeAll(Collection<?> c) {
if(_disposed) {
return false;
}
return _delegate.removeAll(c);
}
public boolean retainAll(Collection<?> c) {
if(_disposed) {
return false;
}
return _delegate.retainAll(c);
}
public int size() {
if(_disposed) {
return 0;
}
return _delegate.size();
}
public Object[] toArray() {
if(_disposed) {
return new Object[0];
}
return _delegate.toArray();
}
@SuppressWarnings("unchecked")
public <T> T[] toArray(T[] a) {
if(_disposed) {
return (T[]) new Object[0];
}
return _delegate.toArray(a);
}
public void clear() {
_delegate.clear();
}
}