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>StringList</code> is an immutable ordered collection of
  28  * <code>GenericString</code>.
  29  */
  30 public interface StringList extends List<String> {
  31     /**
  32      *  The number of <code>GenericString</code>s in the list. The range of
  33      * valid child object indices is 0 to <code>length-1</code> inclusive.
  34      */
  35     public int getLength();
  36 
  37     /**
  38      *  Checks if the <code>GenericString</code> <code>item</code> is a member
  39      * of this list.
  40      * @param item  <code>GenericString</code> whose presence in this list is
  41      *   to be tested.
  42      * @return  True if this list contains the <code>GenericString</code>
  43      *   <code>item</code>.
  44      */
  45     public boolean contains(String item);
  46 
  47     /**
  48      *  Returns the <code>index</code>th item in the collection or
  49      * <code>null</code> if <code>index</code> is greater than or equal to
  50      * the number of objects in the list. The index starts at 0.
  51      * @param index  index into the collection.
  52      * @return  The <code>GenericString</code> at the <code>index</code>th
  53      *   position in the <code>StringList</code>, or <code>null</code> if
  54      *   the index specified is not valid.
  55      */
  56     public String item(int index);
  57 
  58 }