/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2001, 2002 The Apache Software Foundation.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 2001, International
 * Business Machines, Inc., http://www.apache.org.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package com.sun.org.apache.xerces.internal.dom;

import java.util.Vector;

import org.w3c.dom.DOMStringList;

/**
 * DOM Level 3 Experimental
 * 
 * This class implemets the DOM Levl 3 Core interface DOMStringList.
 * 
 * @author nddelima
 */
public class DOMStringListImpl implements DOMStringList {
	
	//A collection of DOMString values
    private Vector fStrings;

    /** 
     * Construct an empty list of DOMStringListImpl
     */ 
    public DOMStringListImpl() {
        fStrings = new Vector();    
    }

    /** 
     * Construct an empty list of DOMStringListImpl
     */ 
    public DOMStringListImpl(Vector params) {
        fStrings = params;    
    }
        
	/**
	 * @see org.w3c.dom.DOMStringList#item(int)
	 */
	public String item(int index) {
        try {
            return (String) fStrings.elementAt(index);
        } catch (ArrayIndexOutOfBoundsException e) {
            return null;
        }
	}

	/**
	 * @see org.w3c.dom.DOMStringList#getLength()
	 */
	public int getLength() {
		return fStrings.size();
	}

	/**
	 * @see org.w3c.dom.DOMStringList#contains(String)
	 */
	public boolean contains(String param) {
		return fStrings.contains(param) ;
	}

    /**
     * DOM Internal:
     * Add a <code>DOMString</code> to the list.
     * 
     * @param domString A string to add to the list
     */
    public void add(String param) {
        fStrings.add(param);
    }

}