KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > jcorporate > expresso > ext > struts > taglib > bean > ExWriteTag


1 /* ====================================================================
2  * The Jcorporate Apache Style Software License, Version 1.2 05-07-2002
3  *
4  * Copyright (c) 1995-2002 Jcorporate Ltd. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in
15  * the documentation and/or other materials provided with the
16  * distribution.
17  *
18  * 3. The end-user documentation included with the redistribution,
19  * if any, must include the following acknowledgment:
20  * "This product includes software developed by Jcorporate Ltd.
21  * (http://www.jcorporate.com/)."
22  * Alternately, this acknowledgment may appear in the software itself,
23  * if and wherever such third-party acknowledgments normally appear.
24  *
25  * 4. "Jcorporate" and product names such as "Expresso" must
26  * not be used to endorse or promote products derived from this
27  * software without prior written permission. For written permission,
28  * please contact info@jcorporate.com.
29  *
30  * 5. Products derived from this software may not be called "Expresso",
31  * or other Jcorporate product names; nor may "Expresso" or other
32  * Jcorporate product names appear in their name, without prior
33  * written permission of Jcorporate Ltd.
34  *
35  * 6. No product derived from this software may compete in the same
36  * market space, i.e. framework, without prior written permission
37  * of Jcorporate Ltd. For written permission, please contact
38  * partners@jcorporate.com.
39  *
40  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
41  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
42  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
43  * DISCLAIMED. IN NO EVENT SHALL JCORPORATE LTD OR ITS CONTRIBUTORS
44  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
45  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
46  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
47  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
48  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
49  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
50  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  * ====================================================================
53  *
54  * This software consists of voluntary contributions made by many
55  * individuals on behalf of the Jcorporate Ltd. Contributions back
56  * to the project(s) are encouraged when you make modifications.
57  * Please send them to support@jcorporate.com. For more information
58  * on Jcorporate Ltd. and its products, please see
59  * <http://www.jcorporate.com/>.
60  *
61  * Portions of this software are based upon other open source
62  * products and are subject to their respective licenses.
63  */
64
65 package com.jcorporate.expresso.ext.struts.taglib.bean;
66
67 import com.jcorporate.expresso.core.misc.StringUtil;
68 import com.jcorporate.expresso.ext.struts.taglib.ControllerUtils;
69 import org.apache.struts.taglib.bean.WriteTag;
70 import org.apache.struts.util.ResponseUtils;
71
72 import javax.servlet.jsp.JspException JavaDoc;
73
74
75 /**
76  * Tag that retrieves the specified property of the specified bean, converts
77  * it to a String representation (if necessary), and writes it to the current
78  * output stream, optionally filtering characters that are sensitive in HTML.
79  *
80  * @author Craig R. McClanahan
81  */
82 public class ExWriteTag
83         extends WriteTag {
84     public ExWriteTag() {
85         super();
86         filter = false;
87     }
88     // --------------------------------------------------------- Public Methods
89 /**
90      * Process the start tag.
91      *
92      * @return integer as defined in the standard tag library framework.
93      * @throws JspException if a JSP exception has occurred
94      */
95     public int doStartTag()
96             throws JspException JavaDoc {
97
98         // Look up the requested property value
99 Object JavaDoc value = ControllerUtils.getBeanProperty(pageContext, name,
100                 property, ignore);
101
102         if (value == null) {
103             if (name == null) {
104                 throw new JspException JavaDoc("No such element/property in " +
105                         "ControllerResponse as '" +
106                         StringUtil.notNull(property) + "'");
107             } else {
108                 throw new JspException JavaDoc("No such property as '" +
109                         StringUtil.notNull(property) +
110                         "' in element '" + name + "'");
111             }
112         }
113
114         // Print this property value to our output writer, suitably filtered
115 String JavaDoc output = value.toString();
116
117         if (filter) {
118             ResponseUtils.write(pageContext, ResponseUtils.filter(output));
119         } else {
120             ResponseUtils.write(pageContext, output);
121         }
122
123         // Continue processing this page
124 return (SKIP_BODY);
125     }
126 }
127
Popular Tags