/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package net.sourceforge.phpdt.internal.core.jdom;

import java.util.Enumeration;

import net.sourceforge.phpdt.core.jdom.IDOMNode;

/**
 * SiblingEnumeration provides an enumeration on a linked list of sibling DOM
 * nodes.
 * 
 * @see java.util.Enumeration
 */

/* package */class SiblingEnumeration implements Enumeration {

	/**
	 * The current location in the linked list of DOM nodes.
	 */
	protected IDOMNode fCurrentElement;

	/**
	 * Creates an enumeration of silbings starting at the given node. If the
	 * given node is <code>null</code> the enumeration is empty.
	 */
	SiblingEnumeration(IDOMNode child) {
		fCurrentElement = child;
	}

	/**
	 * @see java.util.Enumeration#hasMoreElements()
	 */
	public boolean hasMoreElements() {
		return fCurrentElement != null;
	}

	/**
	 * @see java.util.Enumeration#nextElement()
	 */
	public Object nextElement() {
		IDOMNode curr = fCurrentElement;
		if (curr != null) {
			fCurrentElement = fCurrentElement.getNextNode();
		}
		return curr;
	}
}