/*
* Licensed to "Neo Technology," Network Engine for Objects in Lund AB
* (http://neotechnology.com) under one or more contributor license agreements.
* See the NOTICE file distributed with this work for additional information
* regarding copyright ownership. Neo Technology 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.neo4j.neoclipse.event;
import java.util.Iterator;
import org.eclipse.core.runtime.ListenerList;
/**
* Class to handle a list of neoclipse event listeners in a type safe way.
* Removal of listeners is not available.
* @author Anders Nawroth
*/
public class NeoclipseListenerList implements Iterable<NeoclipseEventListener>
{
private ListenerList list = new ListenerList( ListenerList.IDENTITY );
private boolean inhibit = false;
/**
* Add an event listener.
* @param listener
*/
public void add( NeoclipseEventListener listener )
{
list.add( listener );
}
/**
* Notify listeners something changed.
* @param event
*/
public void notifyListeners( NeoclipseEvent event )
{
if ( inhibit )
{
return;
}
for ( NeoclipseEventListener listener : this )
{
listener.stateChanged( event );
}
}
/**
* Set the inhibit status. True means all notifications are inhibited until
* the status is flipped back to false.
* @param inhibit
*/
public void setInhibit( boolean inhibit )
{
this.inhibit = inhibit;
}
/**
* Iterate over the listeners.
*/
public Iterator<NeoclipseEventListener> iterator()
{
final Object[] listeners = list.getListeners();
return new Iterator<NeoclipseEventListener>()
{
private int pos = 0;
public boolean hasNext()
{
return pos < listeners.length;
}
public NeoclipseEventListener next()
{
return (NeoclipseEventListener) listeners[pos++];
}
public void remove()
{
// nothing here
}
};
}
}