001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * Portions Copyright Apache Software Foundation.
007: *
008: * The contents of this file are subject to the terms of either the GNU
009: * General Public License Version 2 only ("GPL") or the Common Development
010: * and Distribution License("CDDL") (collectively, the "License"). You
011: * may not use this file except in compliance with the License. You can obtain
012: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
013: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
014: * language governing permissions and limitations under the License.
015: *
016: * When distributing the software, include this License Header Notice in each
017: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
018: * Sun designates this particular file as subject to the "Classpath" exception
019: * as provided by Sun in the GPL Version 2 section of the License file that
020: * accompanied this code. If applicable, add the following below the License
021: * Header, with the fields enclosed by brackets [] replaced by your own
022: * identifying information: "Portions Copyrighted [year]
023: * [name of copyright owner]"
024: *
025: * Contributor(s):
026: *
027: * If you wish your version of this file to be governed by only the CDDL or
028: * only the GPL Version 2, indicate your decision by adding "[Contributor]
029: * elects to include this software in this distribution under the [CDDL or GPL
030: * Version 2] license." If you don't indicate a single choice of license, a
031: * recipient has the option to distribute your version of this file under
032: * either the CDDL, the GPL Version 2 or to extend the choice of license to
033: * its licensees as provided above. However, if you add GPL Version 2 code
034: * and therefore, elected the GPL Version 2 license, then the option applies
035: * only if the new code is made subject to such option by the copyright
036: * holder.
037: */
038:
039: package org.apache.taglibs.standard.tag.common.xml;
040:
041: import javax.servlet.jsp.JspException;
042: import javax.servlet.jsp.JspTagException;
043: import javax.servlet.jsp.tagext.BodyTagSupport;
044: import javax.servlet.jsp.tagext.Tag;
045:
046: import org.apache.taglibs.standard.resources.Resources;
047:
048: /**
049: * <p>Support for tag handlers for <param>, the XML parameter
050: * subtag for <transformt<.</p>
051: *
052: * @see TransformSupport
053: * @author Shawn Bayern
054: */
055:
056: public abstract class ParamSupport extends BodyTagSupport {
057:
058: //*********************************************************************
059: // Protected state
060:
061: protected String name; // 'name' attribute
062: protected Object value; // 'value' attribute
063:
064: //*********************************************************************
065: // Constructor and initialization
066:
067: public ParamSupport() {
068: super ();
069: init();
070: }
071:
072: private void init() {
073: name = null;
074: value = null;
075: }
076:
077: //*********************************************************************
078: // Tag logic
079:
080: // simply send our name and value to our parent <transform> tag
081: public int doEndTag() throws JspException {
082: Tag t = findAncestorWithClass(this , TransformSupport.class);
083: if (t == null)
084: throw new JspTagException(Resources
085: .getMessage("PARAM_OUTSIDE_TRANSFORM"));
086: TransformSupport parent = (TransformSupport) t;
087:
088: Object value = this .value;
089: if (value == null) {
090: if (bodyContent == null || bodyContent.getString() == null)
091: value = "";
092: else
093: value = bodyContent.getString().trim();
094: }
095: parent.addParameter(name, value);
096: return EVAL_PAGE;
097: }
098:
099: // Releases any resources we may have (or inherit)
100: public void release() {
101: init();
102: }
103: }
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