/*
* Copyright (c) 2005-2016 Vincent Vandenschrick. All rights reserved.
*
* This file is part of the Jspresso framework.
*
* Jspresso is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Jspresso is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Jspresso. If not, see <http://www.gnu.org/licenses/>.
*/
package org.jspresso.framework.util.bean;
import java.beans.PropertyChangeListener;
import java.util.Collection;
import java.util.Set;
import gnu.trove.set.hash.THashSet;
import gnu.trove.set.hash.TLinkedHashSet;
import org.jspresso.framework.util.collection.TWeakHashSet;
/**
* This property change support prevents from adding twice the same property
* change listener.
*
* @author Vincent Vandenschrick
*/
public class SinglePropertyChangeSupport extends PropertyChangeSupport {
private static final long serialVersionUID = -8756036677115452017L;
/**
* Constructs a {@code WeakPropertyChangeSupport} object.
*
* @param sourceBean
* The bean to be given as the source for any events.
*/
public SinglePropertyChangeSupport(Object sourceBean) {
super(sourceBean);
}
@Override
protected Collection<PropertyChangeListener> createListenersCollection() {
return new TLinkedHashSet<>(1);
}
/**
* Create child.
*
* @return the property change support
*/
@Override
protected PropertyChangeSupport createChild() {
return new SinglePropertyChangeSupport(getSource());
}
}