001 /*
002 * $Id: StringBufferWriter.java,v 1.1 2004/01/27 20:55:44 jstrachan Exp $
003 *
004 * Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
005 *
006 * Redistribution and use of this software and associated documentation
007 * ("Software"), with or without modification, are permitted provided that the
008 * following conditions are met: 1. Redistributions of source code must retain
009 * copyright statements and notices. Redistributions must also contain a copy
010 * of this document. 2. Redistributions in binary form must reproduce the above
011 * copyright notice, this list of conditions and the following disclaimer in
012 * the documentation and/or other materials provided with the distribution. 3.
013 * The name "groovy" must not be used to endorse or promote products derived
014 * from this Software without prior written permission of The Codehaus. For
015 * written permission, please contact info@codehaus.org. 4. Products derived
016 * from this Software may not be called "groovy" nor may "groovy" appear in
017 * their names without prior written permission of The Codehaus. "groovy" is a
018 * registered trademark of The Codehaus. 5. Due credit should be given to The
019 * Codehaus - http://groovy.codehaus.org/
020 *
021 * THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS ``AS IS'' AND ANY
022 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
023 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
024 * DISCLAIMED. IN NO EVENT SHALL THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR
025 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
026 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
027 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
028 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
029 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
030 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
031 * DAMAGE.
032 *
033 */
034 package org.codehaus.groovy.runtime;
035
036 import java.io.IOException;
037 import java.io.Writer;
038
039 /**
040 * This class codes around a silly limiation of StringWriter which doesn't allow a StringBuffer
041 * to be passed in as a constructor for some bizzare reason.
042 * So we replicate the behaviour of StringWriter here but allow a StringBuffer to be passed in.
043 *
044 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
045 * @version $Revision: 1.1 $
046 */
047 public class StringBufferWriter extends Writer {
048
049 private StringBuffer buffer;
050
051 /**
052 * Create a new string writer which will append the text to the given StringBuffer
053 */
054 public StringBufferWriter(StringBuffer buffer) {
055 this.buffer = buffer;
056 }
057
058 /**
059 * Write a single character.
060 */
061 public void write(int c) {
062 buffer.append((char) c);
063 }
064
065 /**
066 * Write a portion of an array of characters.
067 *
068 * @param text Array of characters
069 * @param offset Offset from which to start writing characters
070 * @param length Number of characters to write
071 */
072 public void write(char text[], int offset, int length) {
073 if ((offset < 0) || (offset > text.length) || (length < 0) || ((offset + length) > text.length) || ((offset + length) < 0)) {
074 throw new IndexOutOfBoundsException();
075 }
076 else if (length == 0) {
077 return;
078 }
079 buffer.append(text, offset, length);
080 }
081
082 /**
083 * Write a string.
084 */
085 public void write(String text) {
086 buffer.append(text);
087 }
088
089 /**
090 * Write a portion of a string.
091 *
092 * @param text the text to be written
093 * @param offset offset from which to start writing characters
094 * @param length Number of characters to write
095 */
096 public void write(String text, int offset, int length) {
097 buffer.append(text.substring(offset, offset + length));
098 }
099
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 }