/**
* Copyright (c) 2002-2010 IBM Corporation and others.
* 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:
* IBM - Initial API and implementation
*/
package org.eclipse.emf.edit.provider;
import java.util.Collections;
import java.util.Iterator;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.common.util.AbstractTreeIterator;
/**
* This implements a tree iterator that iterates over an object, it's children, their children, and so on,
* use the {@link ITreeItemContentProvider}s produced by an adapter factory.
*/
public class AdapterFactoryTreeIterator<E> extends AbstractTreeIterator<E>
{
private static final long serialVersionUID = 1L;
/**
* This keeps track of the factory used to generate the ITreeItemContentProvider adapters.
*/
protected AdapterFactory adapterFactory;
/**
* This constructs tree iterator that iterates over an object, it's children, their children, and so on.
*/
public AdapterFactoryTreeIterator(AdapterFactory adapterFactory, E object)
{
super(object);
this.adapterFactory = adapterFactory;
}
/**
* This constructs tree iterator that iterates over an object (but only if includeRoot is true),
* it's children, their children, and so on.
*/
public AdapterFactoryTreeIterator(AdapterFactory adapterFactory, Object object, boolean includeRoot)
{
super(object, includeRoot);
this.adapterFactory = adapterFactory;
}
@SuppressWarnings("unchecked")
@Override
protected Iterator<E> getChildren(Object o)
{
ITreeItemContentProvider treeItemContentProvider = (ITreeItemContentProvider)adapterFactory.adapt(o, ITreeItemContentProvider.class);
return
treeItemContentProvider != null ?
(Iterator<E>)treeItemContentProvider.getChildren(o).iterator() :
Collections.<E>emptyList().iterator();
}
}