1 /*
   2  * Copyright (c) 2005, 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 /**
  41  * <code>ReplaceableString</code> is an adapter class that implements the
  42  * <code>Replaceable</code> API around an ordinary <code>StringBuffer</code>.
  43  *
  44  * <p><em>Note:</em> This class does not support attributes and is not
  45  * intended for general use.  Most clients will need to implement
  46  * {@link Replaceable} in their text representation class.
  47  *
  48  * <p>Copyright &copy; IBM Corporation 1999.  All rights reserved.
  49  *
  50  * @see Replaceable
  51  * @author Alan Liu
  52  * @stable ICU 2.0
  53  */
  54 public class ReplaceableString implements Replaceable {
  55 
  56     private StringBuffer buf;
  57 
  58     /**
  59      * Construct a new object with the given initial contents.
  60      * @param str initial contents
  61      * @stable ICU 2.0
  62      */
  63     public ReplaceableString(String str) {
  64         buf = new StringBuffer(str);
  65     }
  66 
  67     //// for StringPrep
  68     /**
  69      * Construct a new object using <code>buf</code> for internal
  70      * storage.  The contents of <code>buf</code> at the time of
  71      * construction are used as the initial contents.  <em>Note!
  72      * Modifications to <code>buf</code> will modify this object, and
  73      * vice versa.</em>
  74      * @param buf object to be used as internal storage
  75      * @stable ICU 2.0
  76      */
  77     public ReplaceableString(StringBuffer buf) {
  78         this.buf = buf;
  79     }
  80 
  81     /**
  82      * Return the number of characters contained in this object.
  83      * <code>Replaceable</code> API.
  84      * @stable ICU 2.0
  85      */
  86     public int length() {
  87         return buf.length();
  88     }
  89 
  90     /**
  91      * Return the character at the given position in this object.
  92      * <code>Replaceable</code> API.
  93      * @param offset offset into the contents, from 0 to
  94      * <code>length()</code> - 1
  95      * @stable ICU 2.0
  96      */
  97     public char charAt(int offset) {
  98         return buf.charAt(offset);
  99     }
 100 
 101     //// for StringPrep
 102     /**
 103      * Copies characters from this object into the destination
 104      * character array.  The first character to be copied is at index
 105      * <code>srcStart</code>; the last character to be copied is at
 106      * index <code>srcLimit-1</code> (thus the total number of
 107      * characters to be copied is <code>srcLimit-srcStart</code>). The
 108      * characters are copied into the subarray of <code>dst</code>
 109      * starting at index <code>dstStart</code> and ending at index
 110      * <code>dstStart + (srcLimit-srcStart) - 1</code>.
 111      *
 112      * @param srcStart the beginning index to copy, inclusive; <code>0
 113      * <= start <= limit</code>.
 114      * @param srcLimit the ending index to copy, exclusive;
 115      * <code>start <= limit <= length()</code>.
 116      * @param dst the destination array.
 117      * @param dstStart the start offset in the destination array.
 118      * @stable ICU 2.0
 119      */
 120     public void getChars(int srcStart, int srcLimit, char dst[], int dstStart) {
 121         Utility.getChars(buf, srcStart, srcLimit, dst, dstStart);
 122     }
 123 }