1 /*
2 * Scope: a generic MVC framework.
3 * Copyright (c) 2000-2002, The Scope team
4 * All rights reserved.
5 *
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * Neither the name "Scope" nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
27 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 *
36 * $Id: PropertyTag.java,v 1.6 2002/09/05 15:41:48 ludovicc Exp $
37 */
38 package org.scopemvc.view.servlet.jsp;
39
40
41 import javax.servlet.ServletRequest;
42 import javax.servlet.jsp.JspException;
43 import javax.servlet.jsp.tagext.TagSupport;
44 import org.apache.commons.logging.Log;
45 import org.apache.commons.logging.LogFactory;
46 import org.scopemvc.controller.servlet.jsp.JSPContext;
47 import org.scopemvc.core.PropertyManager;
48 import org.scopemvc.core.Selector;
49 import org.scopemvc.util.convertor.StringConvertor;
50 import org.scopemvc.util.convertor.StringConvertors;
51
52 /***
53 * <P>
54 *
55 * JSP tag to fetch a named property from the JSPView's bound model. </P>
56 *
57 * @author <A HREF="mailto:smeyfroi@users.sourceforge.net">Steve Meyfroidt</A>
58 * @created 05 September 2002
59 * @version $Revision: 1.6 $ $Date: 2002/09/05 15:41:48 $
60 */
61 public class PropertyTag extends TagSupport {
62
63 private final static Log LOG = LogFactory.getLog(PropertyTag.class);
64
65 private String name;
66
67
68 /***
69 * Sets the name
70 *
71 * @param inName The new name value
72 */
73 public void setName(String inName) {
74 name = inName;
75 }
76
77
78 /***
79 * TODO: document the method
80 *
81 * @return TODO: Describe the Return Value
82 * @throws JspException TODO: Describe the Exception
83 */
84 public int doEndTag() throws JspException {
85 ServletRequest request = pageContext.getRequest();
86 Object model = request.getAttribute(JSPContext.BOUND_MODEL);
87 if (model == null) {
88 return EVAL_PAGE;
89 }
90
91 PropertyManager manager = PropertyManager.getInstance(model);
92 if (manager == null) {
93 LOG.error("Can't get PropertyManager for: " + model);
94 return EVAL_PAGE;
95 }
96
97 try {
98 Selector selector = Selector.fromString(name);
99 Class propertyClass = manager.getPropertyClass(model, selector);
100 Object property = manager.get(model, selector);
101
102 StringConvertor convertor = StringConvertors.forClass(propertyClass);
103 String value = convertor.valueAsString(property);
104
105 pageContext.getOut().write(value);
106 } catch (Exception e) {
107 LOG.error("Can't get property: " + name, e);
108 }
109 return EVAL_PAGE;
110 }
111 }
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