1 /*
2 * $Id: StringBufferWriter.java,v 1.1 2004/01/27 20:55:44 jstrachan Exp $
3 *
4 * Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
5 *
6 * Redistribution and use of this software and associated documentation
7 * ("Software"), with or without modification, are permitted provided that the
8 * following conditions are met: 1. Redistributions of source code must retain
9 * copyright statements and notices. Redistributions must also contain a copy
10 * of this document. 2. Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the distribution. 3.
13 * The name "groovy" must not be used to endorse or promote products derived
14 * from this Software without prior written permission of The Codehaus. For
15 * written permission, please contact info@codehaus.org. 4. Products derived
16 * from this Software may not be called "groovy" nor may "groovy" appear in
17 * their names without prior written permission of The Codehaus. "groovy" is a
18 * registered trademark of The Codehaus. 5. Due credit should be given to The
19 * Codehaus - http://groovy.codehaus.org/
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS ``AS IS'' AND ANY
22 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR
25 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
27 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
28 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
31 * DAMAGE.
32 *
33 */
34 package org.codehaus.groovy.runtime;
35
36 import java.io.IOException;
37 import java.io.Writer;
38
39 /***
40 * This class codes around a silly limiation of StringWriter which doesn't allow a StringBuffer
41 * to be passed in as a constructor for some bizzare reason.
42 * So we replicate the behaviour of StringWriter here but allow a StringBuffer to be passed in.
43 *
44 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
45 * @version $Revision: 1.1 $
46 */
47 public class StringBufferWriter extends Writer {
48
49 private StringBuffer buffer;
50
51 /***
52 * Create a new string writer which will append the text to the given StringBuffer
53 */
54 public StringBufferWriter(StringBuffer buffer) {
55 this.buffer = buffer;
56 }
57
58 /***
59 * Write a single character.
60 */
61 public void write(int c) {
62 buffer.append((char) c);
63 }
64
65 /***
66 * Write a portion of an array of characters.
67 *
68 * @param text Array of characters
69 * @param offset Offset from which to start writing characters
70 * @param length Number of characters to write
71 */
72 public void write(char text[], int offset, int length) {
73 if ((offset < 0) || (offset > text.length) || (length < 0) || ((offset + length) > text.length) || ((offset + length) < 0)) {
74 throw new IndexOutOfBoundsException();
75 }
76 else if (length == 0) {
77 return;
78 }
79 buffer.append(text, offset, length);
80 }
81
82 /***
83 * Write a string.
84 */
85 public void write(String text) {
86 buffer.append(text);
87 }
88
89 /***
90 * Write a portion of a string.
91 *
92 * @param text the text to be written
93 * @param offset offset from which to start writing characters
94 * @param length Number of characters to write
95 */
96 public void write(String text, int offset, int length) {
97 buffer.append(text.substring(offset, offset + length));
98 }
99
100 /***
101 * Return the buffer's current value as a string.
102 */
103 public String toString() {
104 return buffer.toString();
105 }
106
107 /***
108 * Flush the stream.
109 */
110 public void flush() {
111 }
112
113 /***
114 * Closing a <tt>StringWriter</tt> has no effect. The methods in this
115 * class can be called after the stream has been closed without generating
116 * an <tt>IOException</tt>.
117 */
118 public void close() throws IOException {
119 }
120 }