bundles/org.eclipse.wst.xml.xpath.ui/src/org/eclipse/wst/xml/xpath/internal/ui/views/JFaceNodeContentProviderXPath.java

/*******************************************************************************
 * Copyright (c) 2008 Chase Technology Ltd - http://www.chasetechnology.co.uk
 * 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:
 *     Doug Satchwell (Chase Technology Ltd) - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.xml.xpath.internal.ui.views;

import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.wst.sse.core.internal.provisional.INodeAdapter;
import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
import org.eclipse.wst.sse.ui.internal.contentoutline.IJFaceNodeAdapter;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMModel;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class JFaceNodeContentProviderXPath implements ITreeContentProvider
{
	protected IJFaceNodeAdapter getAdapter(Object adaptable)
	{
		if (adaptable instanceof INodeNotifier)
		{
			INodeAdapter adapter = ((INodeNotifier) adaptable).getAdapterFor(IJFaceNodeAdapter.class);
			if (adapter instanceof IJFaceNodeAdapter)
				return (IJFaceNodeAdapter) adapter;
		}

		return null;
	}

	public Object[] getChildren(Object object)
	{
		IJFaceNodeAdapter adapter = getAdapter(object);
		if (adapter != null)
			return adapter.getChildren(object);
		return new Object[0];
	}

	public Object[] getElements(Object object)
	{
		if (object instanceof IDOMModel)
		{
			Object topNode = ((IDOMModel) object).getDocument();
			IJFaceNodeAdapter adapter = getAdapter(topNode);
			if (adapter != null)
				return adapter.getElements(topNode);
		}
		else if (object instanceof NodeList)
		{
			NodeList nodeList = (NodeList) object;
			// List toReturn = new ArrayList(nodes.size());
			// for (Iterator iter = nodes.iterator(); iter.hasNext();)
			// {
			// IDOMNode node = (IDOMNode) iter.next();
			// //IJFaceNodeAdapter adapter = getAdapter(node);
			// if (node!=null)
			// toReturn.add(node);
			// }
			Node[] nodes = new Node[nodeList.getLength()];
			for (int i=0;i<nodes.length;i++)
			{
				nodes[i] = nodeList.item(i);
			}
			return nodes;
		}
		return new Object[0];
	}

	public Object getParent(Object object)
	{
		IJFaceNodeAdapter adapter = getAdapter(object);
		if (adapter != null)
			return adapter.getParent(object);
		return null;
	}

	public boolean hasChildren(Object object)
	{
		IJFaceNodeAdapter adapter = getAdapter(object);
		if (adapter != null)
			return adapter.hasChildren(object);
		return false;
	}

	public void inputChanged(Viewer viewer, Object oldInput, Object newInput)
	{
	}

	public void dispose()
	{
	}
}