1 /*
2 * $Header: $
3 * $Revision: 1.0 $
4 * $Date: $
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,
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47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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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: $
61 */
62 package org.apache.commons.jelly.tags.dynabean;
63
64 import java.io.IOException;
65 import java.io.Writer;
66 import java.util.ArrayList;
67 import java.util.Iterator;
68 import java.util.List;
69
70 import org.apache.commons.jelly.JellyContext;
71 import org.apache.commons.jelly.Script;
72 import org.apache.commons.jelly.Tag;
73 import org.apache.commons.jelly.TagSupport;
74 import org.apache.commons.jelly.XMLOutput;
75 import org.apache.commons.jelly.impl.ScriptBlock;
76 import org.apache.commons.jelly.impl.TagScript;
77 import org.apache.commons.jelly.expression.Expression;
78
79 import org.apache.commons.jelly.JellyException;
80 import org.apache.commons.jelly.MissingAttributeException;
81
82 import org.apache.commons.beanutils.*;
83
84 /***
85 * A tag which creates and defines and creates a DynaClass
86 * The DynaClass object is placed by name in the context,
87 * so that a DynaBean tag can use it by name to instantiate
88 * a DynaBean object
89 *
90 * @author Theo Niemeijer
91 * @version 1.0
92 */
93 public class DynaclassTag extends TagSupport {
94
95 private ArrayList propList = new ArrayList();
96 private DynaProperty[] props = null;
97 private DynaClass dynaClass = null;
98
99 private String name;
100 private String var;
101
102 public DynaclassTag() {
103 }
104
105 // Tag interface
106 //-------------------------------------------------------------------------
107 public void doTag(XMLOutput output) throws Exception {
108
109 if (name == null) {
110 throw new MissingAttributeException("name");
111 }
112
113 if (var == null) {
114 var = name;
115 }
116
117 // Evaluate the body of the dynaclass definition
118 invokeBody(output);
119
120 // Convert the list of properties into array
121 props =
122 (DynaProperty[]) propList.toArray(
123 new DynaProperty[propList.size()]);
124
125 if (props == null) {
126 throw new JellyException("No properties list");
127 }
128
129 if (props.length == 0) {
130 throw new JellyException("No properties");
131 }
132
133 // Create the dynaclass with name and properties
134 dynaClass = (DynaClass) new BasicDynaClass(name, null, props);
135
136 // Place new dynaclass in context
137 context.setVariable(getVar(), dynaClass);
138 }
139
140 // Properties
141 //-------------------------------------------------------------------------
142
143 /***
144 * Sets the name of the new DynaClass
145 */
146 public void setName(String name) {
147 this.name = name;
148 }
149
150 public String getVar() {
151 return var;
152 }
153
154 /***
155 * Sets the name of the variable to export the DynaClass instance
156 */
157 public void setVar(String var) {
158 this.var = var;
159 }
160
161 protected void addDynaProperty(DynaProperty prop) {
162 propList.add(prop);
163 }
164 }
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