1 package org.drools.tags.rule;
2
3 /*
4 $Id: ComponentTagFactory.java,v 1.3 2003/03/25 19:47:32 tdiesler Exp $
5
6 Copyright 2002 (C) The Werken Company. All Rights Reserved.
7
8 Redistribution and use of this software and associated documentation
9 ("Software"), with or without modification, are permitted provided
10 that the following conditions are met:
11
12 1. Redistributions of source code must retain copyright
13 statements and notices. Redistributions must also contain a
14 copy of this document.
15
16 2. Redistributions in binary form must reproduce the
17 above copyright notice, this list of conditions and the
18 following disclaimer in the documentation and/or other
19 materials provided with the distribution.
20
21 3. The name "drools" must not be used to endorse or promote
22 products derived from this Software without prior written
23 permission of The Werken Company. For written permission,
24 please contact bob@werken.com.
25
26 4. Products derived from this Software may not be called "drools"
27 nor may "drools" appear in their names without prior written
28 permission of The Werken Company. "drools" is a registered
29 trademark of The Werken Company.
30
31 5. Due credit should be given to The Werken Company.
32 (http://drools.werken.com/).
33
34 THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS
35 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
36 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
37 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
38 THE WERKEN COMPANY OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
39 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
40 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
41 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
42 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
43 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
44 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
45 OF THE POSSIBILITY OF SUCH DAMAGE.
46
47 */
48
49 import org.apache.commons.jelly.JellyTagException;
50 import org.apache.commons.jelly.Tag;
51 import org.apache.commons.jelly.impl.TagFactory;
52 import org.xml.sax.Attributes;
53
54 /*** Factory for dynamic semantic component tags.
55 *
56 * @see SemanticsTagLibrary
57 *
58 * @author <a href="mailto:bob@eng.werken.com">bob mcwhirter</a>
59 *
60 * @version $Id: ComponentTagFactory.java,v 1.3 2003/03/25 19:47:32 tdiesler Exp $
61 */
62 class ComponentTagFactory implements TagFactory
63 {
64 // ------------------------------------------------------------
65 // Instance members
66 // ------------------------------------------------------------
67
68 /*** Component class. */
69 private Class componentClass;
70
71 /*** Tag class. */
72 private Class tagClass;
73
74 // ------------------------------------------------------------
75 // Constructors
76 // ------------------------------------------------------------
77
78 /*** Construct.
79 *
80 * @param componentClass The component class.
81 * @param tagClass The tag class.
82 */
83 public ComponentTagFactory(Class componentClass,
84 Class tagClass)
85 {
86 this.componentClass = componentClass;
87 this.tagClass = tagClass;
88 }
89
90 // ------------------------------------------------------------
91 // Instance methods
92 // ------------------------------------------------------------
93
94 /*** Retrieve the tag class.
95 *
96 * @return The tag class.
97 */
98 public Class getTagClass()
99 {
100 return this.tagClass;
101 }
102
103 /*** Retrieve the component class.
104 *
105 * @return The component class.
106 */
107 public Class getComponentClass()
108 {
109 return this.componentClass;
110 }
111
112 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
113 // org.apache.commons.jelly.impl.TagFactory
114 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
115
116 /*** Create the tag.
117 *
118 * @return The new tag.
119 *
120 * @throws JellyTagException If an error while attempting to
121 * instantiate the tag.
122 */
123 public Tag createTag(String name,
124 Attributes attrs) throws JellyTagException
125 {
126
127 ComponentTag tag = null;
128 try
129 {
130 tag = (ComponentTag) getTagClass().newInstance();
131 }
132 catch (Exception e)
133 {
134 throw new JellyTagException( e );
135 }
136
137 tag.setComponentClass( getComponentClass() );
138
139 return tag;
140 }
141 }
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