/*******************************************************************************
* Copyright (c) 2005, 2007 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 1.0
* @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
}
}