/******************************************************************************* * Copyright (c) 2005 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 Corporation - initial API and implementation ******************************************************************************/package org.eclipse.jface.viewers;/** * <p> * A content provider that expects every element to be a <code>TreeNode</code>. * Most methods delegate to <code>TreeNode</code>. <code>dispose()</code> * and <code>inputChanged(Viewer, Object, Object)</code> do nothing by * default. * </p> * <p> * This class and all of its methods may be overridden or extended. * </p> *  * @since 3.2 * @see org.eclipse.jface.viewers.TreeNode */public class TreeNodeContentProvider implements ITreeContentProvider {	/*	 * (non-Javadoc)	 * 	 * @see org.eclipse.jface.viewers.IContentProvider#dispose()	 */	public void dispose() {		// Do nothing	}	/*	 * (non-Javadoc)	 * 	 * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)	 */	public Object[] getChildren(final Object parentElement) {		final TreeNode node = (TreeNode) parentElement;		return node.getChildren();	}	/*	 * (non-Javadoc)	 * 	 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)	 */	public Object[] getElements(final Object inputElement) {		if (inputElement instanceof TreeNode[]) {			return (TreeNode[]) inputElement;		}		return new Object[0];	}	/*	 * (non-Javadoc)	 * 	 * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)	 */	public Object getParent(final Object element) {		final TreeNode node = (TreeNode) element;		return node.getParent();	}	/*	 * (non-Javadoc)	 * 	 * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)	 */	public boolean hasChildren(final Object element) {		final TreeNode node = (TreeNode) element;		return node.hasChildren();	}	/*	 * (non-Javadoc)	 * 	 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer,	 *      java.lang.Object, java.lang.Object)	 */	public void inputChanged(final Viewer viewer, final Object oldInput,			final Object newInput) {		// Do nothing	}}