1 /*
2 * $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/impl/DynaTagScript.java,v 1.12 2002/08/13 08:04:38 jstrachan Exp $
3 * $Revision: 1.12 $
4 * $Date: 2002/08/13 08:04:38 $
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: DynaTagScript.java,v 1.12 2002/08/13 08:04:38 jstrachan Exp $
61 */
62 package org.apache.commons.jelly.impl;
63
64 import java.util.Iterator;
65 import java.util.Map;
66
67 import org.apache.commons.beanutils.ConvertingWrapDynaBean;
68 import org.apache.commons.beanutils.DynaBean;
69
70 import org.apache.commons.jelly.CompilableTag;
71 import org.apache.commons.jelly.JellyContext;
72 import org.apache.commons.jelly.JellyException;
73 import org.apache.commons.jelly.Script;
74 import org.apache.commons.jelly.Tag;
75 import org.apache.commons.jelly.DynaTag;
76 import org.apache.commons.jelly.DynaBeanTagSupport;
77 import org.apache.commons.jelly.XMLOutput;
78 import org.apache.commons.jelly.expression.Expression;
79 import org.apache.commons.logging.Log;
80 import org.apache.commons.logging.LogFactory;
81
82 /***
83 * <p><code>DynaTagScript</code> is a script evaluates a custom DynaTag.</p>
84 *
85 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
86 * @version $Revision: 1.12 $
87 */
88 public class DynaTagScript extends TagScript {
89
90 /*** The Log to which logging calls will be made. */
91 private static final Log log = LogFactory.getLog(DynaTagScript.class);
92
93 public DynaTagScript() {
94 }
95
96 public DynaTagScript(TagFactory tagFactory) {
97 super(tagFactory);
98 }
99
100 // Script interface
101 //-------------------------------------------------------------------------
102
103 /*** Evaluates the body of a tag */
104 public void run(JellyContext context, XMLOutput output) throws Exception {
105 if ( ! context.isCacheTags() ) {
106 clearTag();
107 }
108 try {
109 Tag tag = getTag();
110 if ( tag == null ) {
111 return;
112 }
113 tag.setContext(context);
114
115 if ( tag instanceof DynaTag ) {
116 DynaTag dynaTag = (DynaTag) tag;
117
118 // ### probably compiling this to 2 arrays might be quicker and smaller
119 for (Iterator iter = attributes.entrySet().iterator(); iter.hasNext();) {
120 Map.Entry entry = (Map.Entry) iter.next();
121 String name = (String) entry.getKey();
122 Expression expression = (Expression) entry.getValue();
123
124 Object value = expression.evaluate(context);
125 dynaTag.setAttribute(name, value);
126 }
127 }
128 else {
129 // treat the tag as a bean
130 DynaBean dynaBean = new ConvertingWrapDynaBean( tag );
131 for (Iterator iter = attributes.entrySet().iterator(); iter.hasNext();) {
132 Map.Entry entry = (Map.Entry) iter.next();
133 String name = (String) entry.getKey();
134 Expression expression = (Expression) entry.getValue();
135
136 Object value = expression.evaluate(context);
137 dynaBean.set(name, value);
138 }
139 }
140
141 tag.doTag(output);
142 }
143 catch (JellyException e) {
144 handleException(e);
145 }
146 catch (Exception e) {
147 handleException(e);
148 }
149 }
150 }
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