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/*******************************************************************************
* Copyright (c) 2008 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.utility.internal.model.value;
import java.util.Iterator;
import org.eclipse.jpt.utility.internal.ClassTools;
import org.eclipse.jpt.utility.internal.iterators.EmptyIterator;
import org.eclipse.jpt.utility.internal.model.AbstractModel;
import org.eclipse.jpt.utility.model.value.TreeValueModel;
/**
* A tree value model for when you
* don't need to support any nodes.
*
* We don't use a singleton because we hold on to listeners.
*/
public class NullTreeValueModel<E>
extends AbstractModel
implements TreeValueModel<E>
{
private static final long serialVersionUID = 1L;
/**
* Default constructor.
*/
public NullTreeValueModel() {
super();
}
// ********** TreeValueModel implementation **********
public Iterator<E> nodes() {
return EmptyIterator.instance();
}
// ********** Object overrides **********
@Override
public String toString() {
return ClassTools.shortClassNameForObject(this);
}
}
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