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/**
* Copyright (c) 2008 Oracle 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:
* Oracle Corporation - initial API and implementation
*/
package org.eclipse.jst.jsf.apache.trinidad.tagsupport;
import org.w3c.dom.Node;
/**
* Utility class for the Trinidad Tag Support plug-in.
*
* @author Ian Trimble - Oracle
*/
public class TrinidadUtils {
private static final String KEY_CURRENT_CHILD_INDEX =
"KEY_CURRENT_CHILD_INDEX"; //$NON-NLS-1$
/**
* Sets the index of the Node instance's "current" child as user data on
* the Node instance.
*
* @param node Node instance on which to set index.
* @param index Index of node's "current" child.
* @return true if index has changed, else false.
*/
public static boolean setCurrentChildIndex(Node node, int index) {
boolean indexChanged = false;
if (node != null) {
int currentIndex = getCurrentChildIndex(node);
if (currentIndex != index) {
node.setUserData(
KEY_CURRENT_CHILD_INDEX,
new Integer(index),
null);
indexChanged = true;
}
}
return indexChanged;
}
/**
* Gets the index of the Node instance's "current" child from user data on
* the Node instance.
*
* @param node Node instance from which to get index.
* @return Index of node's "current" child. A value of -1 indicates
* inability to get index from node.
*/
public static int getCurrentChildIndex(Node node) {
int index = -1;
if (node != null) {
Object obj = node.getUserData(KEY_CURRENT_CHILD_INDEX);
if (obj instanceof Integer) {
index = ((Integer)obj).intValue();
}
}
return index;
}
}
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