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/*******************************************************************************
* Copyright (c) 2007 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.ui.internal.jface;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jpt.ui.jface.DelegatingContentAndLabelProvider;
import org.eclipse.jpt.ui.jface.ItemLabelProviderFactory;
import org.eclipse.jpt.ui.jface.TreeItemContentProvider;
import org.eclipse.jpt.ui.jface.TreeItemContentProviderFactory;
/**
* Extension of {@link DelegatingContentAndLabelProvider} that provides an extension
* to provide tree content
*/
public class DelegatingTreeContentAndLabelProvider extends DelegatingContentAndLabelProvider
implements ITreeContentProvider
{
public DelegatingTreeContentAndLabelProvider(
TreeItemContentProviderFactory treeItemContentProviderFactory) {
super(treeItemContentProviderFactory);
}
public DelegatingTreeContentAndLabelProvider(
TreeItemContentProviderFactory treeItemContentProviderFactory,
ItemLabelProviderFactory itemLabelProviderFactory) {
super(treeItemContentProviderFactory, itemLabelProviderFactory);
}
protected TreeItemContentProvider itemContentProvider(Object item) {
return (TreeItemContentProvider) super.itemContentProvider(item);
}
public Object[] getChildren(Object parentElement) {
TreeItemContentProvider provider = itemContentProvider(parentElement);
return (provider == null) ? new Object[0] : provider.getChildren();
}
public Object getParent(Object element) {
TreeItemContentProvider provider = itemContentProvider(element);
return (provider == null) ? null : provider.getParent();
}
public boolean hasChildren(Object element) {
TreeItemContentProvider provider = itemContentProvider(element);
return (provider == null) ? false : provider.hasChildren();
}
}
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