1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 /*
   6  * Copyright 2003,2004 The Apache Software Foundation.
   7  *
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  *      http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  */
  20 
  21 package com.sun.org.apache.xerces.internal.xs;
  22 
  23 import java.util.List;
  24 
  25 /**
  26  *  The <code>XSObjectList</code> interface provides the abstraction of an
  27  * immutable ordered collection of <code>XSObject</code>s, without defining
  28  * or constraining how this collection is implemented.
  29  */
  30 public interface XSObjectList extends List {
  31     /**
  32      *  The number of <code>XSObjects</code> in the list. The range of valid
  33      * child object indices is 0 to <code>length-1</code> inclusive.
  34      */
  35     public int getLength();
  36 
  37     /**
  38      *  Returns the <code>index</code>th item in the collection or
  39      * <code>null</code> if <code>index</code> is greater than or equal to
  40      * the number of objects in the list. The index starts at 0.
  41      * @param index  index into the collection.
  42      * @return  The <code>XSObject</code> at the <code>index</code>th
  43      *   position in the <code>XSObjectList</code>, or <code>null</code> if
  44      *   the index specified is not valid.
  45      */
  46     public XSObject item(int index);
  47 
  48 }