01: /*
02: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03: *
04: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
05: *
06: * Portions Copyright Apache Software Foundation.
07: *
08: * The contents of this file are subject to the terms of either the GNU
09: * General Public License Version 2 only ("GPL") or the Common Development
10: * and Distribution License("CDDL") (collectively, the "License"). You
11: * may not use this file except in compliance with the License. You can obtain
12: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
13: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
14: * language governing permissions and limitations under the License.
15: *
16: * When distributing the software, include this License Header Notice in each
17: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
18: * Sun designates this particular file as subject to the "Classpath" exception
19: * as provided by Sun in the GPL Version 2 section of the License file that
20: * accompanied this code. If applicable, add the following below the License
21: * Header, with the fields enclosed by brackets [] replaced by your own
22: * identifying information: "Portions Copyrighted [year]
23: * [name of copyright owner]"
24: *
25: * Contributor(s):
26: *
27: * If you wish your version of this file to be governed by only the CDDL or
28: * only the GPL Version 2, indicate your decision by adding "[Contributor]
29: * elects to include this software in this distribution under the [CDDL or GPL
30: * Version 2] license." If you don't indicate a single choice of license, a
31: * recipient has the option to distribute your version of this file under
32: * either the CDDL, the GPL Version 2 or to extend the choice of license to
33: * its licensees as provided above. However, if you add GPL Version 2 code
34: * and therefore, elected the GPL Version 2 license, then the option applies
35: * only if the new code is made subject to such option by the copyright
36: * holder.
37: */
38:
39: package org.apache.taglibs.standard.tag.common.xml;
40:
41: import javax.servlet.jsp.JspTagException;
42:
43: import org.apache.taglibs.standard.tag.common.core.WhenTagSupport;
44:
45: /**
46: * <p>Tag handler for <if> in JSTL's XML library.</p>
47: *
48: * @author Shawn Bayern
49: */
50:
51: public class WhenTag extends WhenTagSupport {
52:
53: //*********************************************************************
54: // Constructor and lifecycle management
55:
56: // initialize inherited and local state
57: public WhenTag() {
58: super ();
59: init();
60: }
61:
62: // Releases any resources we may have (or inherit)
63: public void release() {
64: super .release();
65: init();
66: }
67:
68: //*********************************************************************
69: // Supplied conditional logic
70:
71: protected boolean condition() throws JspTagException {
72: XPathUtil xu = new XPathUtil(pageContext);
73: return (xu.booleanValueOf(XPathUtil.getContext(this ), select));
74: }
75:
76: //*********************************************************************
77: // Private state
78:
79: private String select; // the value of the 'test' attribute
80:
81: //*********************************************************************
82: // Attribute accessors
83:
84: public void setSelect(String select) {
85: this .select = select;
86: }
87:
88: //*********************************************************************
89: // Private utility methods
90:
91: // resets internal state
92: private void init() {
93: select = null;
94: }
95: }
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