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The ActiveMQ Message Broker and Client implementations
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.activemq.kaha.impl.container;
import java.util.Iterator;
import org.apache.activemq.kaha.impl.index.IndexItem;
import org.apache.activemq.kaha.impl.index.IndexLinkedList;
/**
* Values collection iterator for the MapContainer
*
* @version $Revision: 1.2 $
*/
public class ContainerValueCollectionIterator implements Iterator {
protected BaseContainerImpl container;
protected IndexLinkedList list;
protected IndexItem nextItem;
protected IndexItem currentItem;
ContainerValueCollectionIterator(BaseContainerImpl container, IndexLinkedList list, IndexItem start) {
this.container = container;
this.list = list;
this.currentItem = start;
this.nextItem = list.getNextEntry((IndexItem)list.refreshEntry(start));
}
public boolean hasNext() {
return nextItem != null;
}
public Object next() {
synchronized (container) {
nextItem = (IndexItem)list.refreshEntry(nextItem);
currentItem = nextItem;
Object result = container.getValue(nextItem);
nextItem = list.getNextEntry(nextItem);
return result;
}
}
public void remove() {
synchronized (container) {
if (currentItem != null) {
currentItem = (IndexItem)list.refreshEntry(currentItem);
container.remove(currentItem);
}
}
}
}