1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  * @LastModified: Oct 2017
   4  */
   5 /*
   6  * Licensed to the Apache Software Foundation (ASF) under one or more
   7  * contributor license agreements.  See the NOTICE file distributed with
   8  * this work for additional information regarding copyright ownership.
   9  * The ASF licenses this file to You under the Apache License, Version 2.0
  10  * (the "License"); you may not use this file except in compliance with
  11  * the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21 
  22 package com.sun.org.apache.xerces.internal.xs;
  23 
  24 import java.util.List;
  25 
  26 /**
  27  *  The <code>XSObjectList</code> interface provides the abstraction of an
  28  * immutable ordered collection of <code>XSObject</code>s, without defining
  29  * or constraining how this collection is implemented.


  30  */
  31 public interface XSObjectList extends List<XSObject> {
  32     /**
  33      *  The number of <code>XSObjects</code> in the list. The range of valid
  34      * child object indices is 0 to <code>length-1</code> inclusive.
  35      */
  36     public int getLength();
  37 
  38     /**
  39      *  Returns the <code>index</code>th item in the collection or
  40      * <code>null</code> if <code>index</code> is greater than or equal to
  41      * the number of objects in the list. The index starts at 0.
  42      * @param index  index into the collection.
  43      * @return  The <code>XSObject</code> at the <code>index</code>th
  44      *   position in the <code>XSObjectList</code>, or <code>null</code> if
  45      *   the index specified is not valid.
  46      */
  47     public XSObject item(int index);
  48 
  49 }
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