com.hazelcast.client.QueueItemIterator Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2010, Hazel Ltd. All Rights Reserved.
*
* 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.hazelcast.client;
import java.util.Iterator;
import java.util.NoSuchElementException;
public class QueueItemIterator implements Iterator {
private E[] entries;
private int current;
private QueueClientProxy queueProxy;
private volatile boolean removeCalled = false;
public QueueItemIterator(E[] entries, QueueClientProxy queueClientProxy) {
this.entries = entries;
this.queueProxy = queueClientProxy;
current = 0;
}
public boolean hasNext() {
return entries.length > current;
}
public E next() {
if (entries.length <= current) {
throw new NoSuchElementException();
}
E entry = entries[current];
current++;
removeCalled = false;
return entry;
}
public void remove() {
if (current <= 0) {
throw new IllegalStateException("next() method has not yet been called");
}
if (removeCalled) {
throw new IllegalStateException("remove() method has allready bean called");
}
removeCalled = true;
queueProxy.remove(entries[current - 1]);
}
}