1 /*
2 * $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/impl/TextScript.java,v 1.8 2002/06/25 19:12:29 jstrachan Exp $
3 * $Revision: 1.8 $
4 * $Date: 2002/06/25 19:12:29 $
5 *
6 * ====================================================================
7 *
8 * The Apache Software License, Version 1.1
9 *
10 * Copyright (c) 1999-2002 The Apache Software Foundation. All rights
11 * reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 *
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in
22 * the documentation and/or other materials provided with the
23 * distribution.
24 *
25 * 3. The end-user documentation included with the redistribution, if
26 * any, must include the following acknowlegement:
27 * "This product includes software developed by the
28 * Apache Software Foundation (http://www.apache.org/)."
29 * Alternately, this acknowlegement may appear in the software itself,
30 * if and wherever such third-party acknowlegements normally appear.
31 *
32 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
33 * Foundation" must not be used to endorse or promote products derived
34 * from this software without prior written permission. For written
35 * permission, please contact apache@apache.org.
36 *
37 * 5. Products derived from this software may not be called "Apache"
38 * nor may "Apache" appear in their names without prior written
39 * permission of the Apache Group.
40 *
41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * SUCH DAMAGE.
53 * ====================================================================
54 *
55 * This software consists of voluntary contributions made by many
56 * individuals on behalf of the Apache Software Foundation. For more
57 * information on the Apache Software Foundation, please see
58 * <http://www.apache.org/>.
59 *
60 * $Id: TextScript.java,v 1.8 2002/06/25 19:12:29 jstrachan Exp $
61 */
62 package org.apache.commons.jelly.impl;
63
64 import java.io.Writer;
65
66 import org.apache.commons.jelly.JellyContext;
67 import org.apache.commons.jelly.Script;
68 import org.apache.commons.jelly.XMLOutput;
69
70 /*** <p><code>TextScript</code> outputs some static text.</p>
71 *
72 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
73 * @version $Revision: 1.8 $
74 */
75 public class TextScript implements Script {
76
77 /*** the text output by this script */
78 private String text;
79
80 public TextScript() {
81 }
82
83 public TextScript(String text) {
84 this.text = text;
85 }
86
87 public String toString() {
88 return super.toString() + "[text=" + text + "]";
89 }
90
91 /***
92 * Trims whitespace from the start and end of the text in this script
93 */
94 public void trimWhitespace() {
95 this.text = text.trim();
96 }
97
98 /***
99 * Trims whitespace from the start of the text
100 */
101 public void trimStartWhitespace() {
102 int index = 0;
103 for ( int length = text.length(); index < length; index++ ) {
104 char ch = text.charAt(index);
105 if (!Character.isWhitespace(ch)) {
106 break;
107 }
108 }
109 if ( index > 0 ) {
110 this.text = text.substring(index);
111 }
112 }
113
114 /***
115 * Trims whitespace from the end of the text
116 */
117 public void trimEndWhitespace() {
118 int index = text.length();
119 while (--index > 0) {
120 char ch = text.charAt(index);
121 if (!Character.isWhitespace(ch)) {
122 break;
123 }
124 }
125 index++;
126 if ( index < text.length() ) {
127 this.text = text.substring(0,index);
128 }
129 }
130
131 /*** @return the text output by this script */
132 public String getText() {
133 return text;
134 }
135
136 /*** Sets the text output by this script */
137 public void setText(String text) {
138 this.text = text;
139 }
140
141 // Script interface
142 //-------------------------------------------------------------------------
143 public Script compile() {
144 return this;
145 }
146
147 /*** Evaluates the body of a tag */
148 public void run(JellyContext context, XMLOutput output) throws Exception {
149 if ( text != null ) {
150 output.write(text);
151 }
152 }
153 }
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