code: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements. See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership. The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the  "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  /*
   * $Id$
   */
  package org.apache.xml.serializer.dom3;
  
  import java.util.Vector;
  
  //import org.apache.xerces.dom3.DOMStringList;
  import org.w3c.dom.DOMStringList;
  
  /**
   * This class implemets the DOM Level 3 Core interface DOMStringList.
   * 
   * @xsl.usage internal
   */
  final class DOMStringListImpl implements DOMStringList {
      
      //A collection of DOMString values
      private Vector fStrings;
      
      /** 
       * Construct an empty list of DOMStringListImpl
       */ 
      DOMStringListImpl() {
          fStrings = new Vector();    
      }
      
      /** 
       * Construct an empty list of DOMStringListImpl
       */ 
      DOMStringListImpl(Vector params) {
          fStrings = params;    
      }
      
      /** 
       * Construct an empty list of DOMStringListImpl
       */ 
      DOMStringListImpl(String[] params ) {
          fStrings = new Vector();
          if (params != null) {
              for (int i=0; i < params.length; i++) {
                  fStrings.add(params[i]);    
              }
          }
      }
      
      /**
       * @see org.apache.xerces.dom3.DOMStringList#item(int)
       */
      public String item(int index) {
          try {
              return (String) fStrings.elementAt(index);
          } catch (ArrayIndexOutOfBoundsException e) {
              return null;
          }
      }
      
      /**
       * @see org.apache.xerces.dom3.DOMStringList#getLength()
       */
      public int getLength() {
          return fStrings.size();
      }
      
      /**
       * @see org.apache.xerces.dom3.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);
      }
      
  }
  