1 /*
   2  * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 /*
  27  *******************************************************************************
  28  * (C) Copyright IBM Corp. 1996-2005 - All Rights Reserved                     *
  29  *                                                                             *
  30  * The original version of this source code and documentation is copyrighted   *
  31  * and owned by IBM, These materials are provided under terms of a License     *
  32  * Agreement between IBM and Sun. This technology is protected by multiple     *
  33  * US and International patents. This notice and attribution to IBM may not    *
  34  * to removed.                                                                 *
  35  *******************************************************************************
  36  */
  37 
  38 package sun.text.normalizer;
  39 
  40 import java.text.CharacterIterator;
  41 
  42 /**
  43  * This class is a wrapper around CharacterIterator and implements the
  44  * UCharacterIterator protocol
  45  * @author ram
  46  */
  47 
  48 class CharacterIteratorWrapper extends UCharacterIterator {
  49 
  50     private CharacterIterator iterator;
  51 
  52     public CharacterIteratorWrapper(CharacterIterator iter){
  53         if(iter==null){
  54             throw new IllegalArgumentException();
  55         }
  56         iterator     = iter;
  57     }
  58 
  59     /**
  60      * @see UCharacterIterator#current()
  61      */
  62     public int current() {
  63         int c = iterator.current();
  64         if(c==CharacterIterator.DONE){
  65           return DONE;
  66         }
  67         return c;
  68     }
  69 
  70     /**
  71      * @see UCharacterIterator#getLength()
  72      */
  73     public int getLength() {
  74         return (iterator.getEndIndex() - iterator.getBeginIndex());
  75     }
  76 
  77     /**
  78      * @see UCharacterIterator#getIndex()
  79      */
  80     public int getIndex() {
  81         return iterator.getIndex();
  82     }
  83 
  84     /**
  85      * @see UCharacterIterator#next()
  86      */
  87     public int next() {
  88         int i = iterator.current();
  89         iterator.next();
  90         if(i==CharacterIterator.DONE){
  91           return DONE;
  92         }
  93         return i;
  94     }
  95 
  96     /**
  97      * @see UCharacterIterator#previous()
  98      */
  99     public int previous() {
 100         int i = iterator.previous();
 101         if(i==CharacterIterator.DONE){
 102             return DONE;
 103         }
 104         return i;
 105     }
 106 
 107     /**
 108      * @see UCharacterIterator#setIndex(int)
 109      */
 110     public void setIndex(int index) {
 111         iterator.setIndex(index);
 112     }
 113 
 114     /**
 115      * @see UCharacterIterator#getText(char[])
 116      */
 117     public int getText(char[] fillIn, int offset){
 118         int length =iterator.getEndIndex() - iterator.getBeginIndex();
 119         int currentIndex = iterator.getIndex();
 120         if(offset < 0 || offset + length > fillIn.length){
 121             throw new IndexOutOfBoundsException(Integer.toString(length));
 122         }
 123 
 124         for (char ch = iterator.first(); ch != CharacterIterator.DONE; ch = iterator.next()) {
 125             fillIn[offset++] = ch;
 126         }
 127         iterator.setIndex(currentIndex);
 128 
 129         return length;
 130     }
 131 
 132     /**
 133      * Creates a clone of this iterator.  Clones the underlying character iterator.
 134      * @see UCharacterIterator#clone()
 135      */
 136     public Object clone(){
 137         try {
 138             CharacterIteratorWrapper result = (CharacterIteratorWrapper) super.clone();
 139             result.iterator = (CharacterIterator)this.iterator.clone();
 140             return result;
 141         } catch (CloneNotSupportedException e) {
 142             return null; // only invoked if bad underlying character iterator
 143         }
 144     }
 145 }