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  * Copyright (C) 1996-2009, International Business Machines Corporation and    *
29  * others. All Rights Reserved.                                                *
30  *******************************************************************************
31  */
32 
33 package sun.text.normalizer;
34 
35 /**
36  * <code>ReplaceableString</code> is an adapter class that implements the
37  * <code>Replaceable</code> API around an ordinary <code>StringBuffer</code>.
38  *
39  * <p><em>Note:</em> This class does not support attributes and is not
40  * intended for general use.  Most clients will need to implement
41  * {@link Replaceable} in their text representation class.
42  *
43  * <p>Copyright &copy; IBM Corporation 1999.  All rights reserved.
44  *
45  * @see Replaceable
46  * @author Alan Liu
47  * @stable ICU 2.0
48  */
49 class ReplaceableString implements Replaceable {
50 
51     private StringBuffer buf;
52 
53     /**
54      * Construct a new object with the given initial contents.
55      * @param str initial contents
56      * @stable ICU 2.0
57      */
ReplaceableString(String str)58     public ReplaceableString(String str) {
59         buf = new StringBuffer(str);
60     }
61 
62     /**
63      * Construct a new object using <code>buf</code> for internal
64      * storage.  The contents of <code>buf</code> at the time of
65      * construction are used as the initial contents.  <em>Note!
66      * Modifications to <code>buf</code> will modify this object, and
67      * vice versa.</em>
68      * @param buf object to be used as internal storage
69      * @stable ICU 2.0
70      */
ReplaceableString(StringBuffer buf)71     public ReplaceableString(StringBuffer buf) {
72         this.buf = buf;
73     }
74 
75     /**
76      * Return the number of characters contained in this object.
77      * <code>Replaceable</code> API.
78      * @stable ICU 2.0
79      */
length()80     public int length() {
81         return buf.length();
82     }
83 
84     /**
85      * Return the character at the given position in this object.
86      * <code>Replaceable</code> API.
87      * @param offset offset into the contents, from 0 to
88      * <code>length()</code> - 1
89      * @stable ICU 2.0
90      */
charAt(int offset)91     public char charAt(int offset) {
92         return buf.charAt(offset);
93     }
94 
95     /**
96      * Copies characters from this object into the destination
97      * character array.  The first character to be copied is at index
98      * <code>srcStart</code>; the last character to be copied is at
99      * index <code>srcLimit-1</code> (thus the total number of
100      * characters to be copied is <code>srcLimit-srcStart</code>). The
101      * characters are copied into the subarray of <code>dst</code>
102      * starting at index <code>dstStart</code> and ending at index
103      * <code>dstStart + (srcLimit-srcStart) - 1</code>.
104      *
105      * @param srcStart the beginning index to copy, inclusive;
106      *        {@code 0 <= start <= limit}.
107      * @param srcLimit the ending index to copy, exclusive;
108      *        {@code start <= limit <= length()}.
109      * @param dst the destination array.
110      * @param dstStart the start offset in the destination array.
111      * @stable ICU 2.0
112      */
getChars(int srcStart, int srcLimit, char dst[], int dstStart)113     public void getChars(int srcStart, int srcLimit, char dst[], int dstStart) {
114         if (srcStart != srcLimit) {
115             buf.getChars(srcStart, srcLimit, dst, dstStart);
116         }
117     }
118 }
119