1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   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.impl.xs.util;
  23 
  24 import java.util.AbstractList;
  25 
  26 import com.sun.org.apache.xerces.internal.xs.ShortList;
  27 import com.sun.org.apache.xerces.internal.xs.XSException;
  28 
  29 /**
  30  * Containts a list of Object's.
  31  *
  32  * @xerces.internal
  33  *
  34  * @author Sandy Gao, IBM
  35  *
  36  * @version $Id: ShortListImpl.java,v 1.7 2010-11-01 04:40:06 joehw Exp $
  37  */
  38 public final class ShortListImpl extends AbstractList implements ShortList {
  39 
  40     /**
  41      * An immutable empty list.
  42      */
  43     public static final ShortListImpl EMPTY_LIST = new ShortListImpl(new short[0], 0);
  44 
  45     // The array to hold all data
  46     private final short[] fArray;
  47     // Number of elements in this list
  48     private final int fLength;
  49 
  50     /**
  51      * Construct an XSObjectList implementation
  52      *
  53      * @param array     the data array
  54      * @param length    the number of elements
  55      */
  56     public ShortListImpl(short[] array, int length) {
  57         fArray = array;
  58         fLength = length;
  59     }
  60 
  61     /**
  62      * The number of <code>Objects</code> in the list. The range of valid
  63      * child node indices is 0 to <code>length-1</code> inclusive.
  64      */
  65     public int getLength() {
  66         return fLength;
  67     }
  68 
  69     /**
  70      *  Checks if the <code>unsigned short</code> <code>item</code> is a
  71      * member of this list.
  72      * @param item  <code>unsigned short</code> whose presence in this list
  73      *   is to be tested.
  74      * @return  True if this list contains the <code>unsigned short</code>
  75      *   <code>item</code>.
  76      */
  77     public boolean contains(short item) {
  78         for (int i = 0; i < fLength; i++) {
  79             if (fArray[i] == item) {
  80                 return true;
  81             }
  82         }
  83         return false;
  84     }
  85 
  86     public short item(int index) throws XSException {
  87         if (index < 0 || index >= fLength) {
  88             throw new XSException(XSException.INDEX_SIZE_ERR, null);
  89         }
  90         return fArray[index];
  91     }
  92 
  93     public boolean equals(Object obj) {
  94         if (obj == null || !(obj instanceof ShortList)) {
  95             return false;
  96         }
  97         ShortList rhs = (ShortList)obj;
  98 
  99         if (fLength != rhs.getLength()) {
 100             return false;
 101         }
 102         for (int i = 0;i < fLength; ++i) {
 103             if (fArray[i] != rhs.item(i)) {
 104                 return false;
 105             }
 106         }
 107         return true;
 108     }
 109 
 110     /*
 111      * List methods
 112      */
 113 
 114     public Object get(int index) {
 115         if (index >= 0 && index < fLength) {
 116             return new Short(fArray[index]);
 117         }
 118         throw new IndexOutOfBoundsException("Index: " + index);
 119     }
 120 
 121     public int size() {
 122         return getLength();
 123     }
 124 
 125 } // class ShortListImpl