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.fmt;
040:
041: import java.util.TimeZone;
042:
043: import javax.servlet.jsp.JspException;
044: import javax.servlet.jsp.PageContext;
045: import javax.servlet.jsp.jstl.core.Config;
046: import javax.servlet.jsp.tagext.TagSupport;
047:
048: import org.apache.taglibs.standard.tag.common.core.Util;
049:
050: /**
051: * Support for tag handlers for <setTimeZone>, the time zone setting tag
052: * in JSTL 1.0.
053: *
054: * @author Jan Luehe
055: */
056:
057: public abstract class SetTimeZoneSupport extends TagSupport {
058:
059: //*********************************************************************
060: // Protected state
061:
062: protected Object value; // 'value' attribute
063:
064: //*********************************************************************
065: // Private state
066:
067: private int scope; // 'scope' attribute
068: private String var; // 'var' attribute
069:
070: //*********************************************************************
071: // Constructor and initialization
072:
073: public SetTimeZoneSupport() {
074: super ();
075: init();
076: }
077:
078: // resets local state
079: private void init() {
080: value = var = null;
081: scope = PageContext.PAGE_SCOPE;
082: }
083:
084: //*********************************************************************
085: // Tag attributes known at translation time
086:
087: public void setScope(String scope) {
088: this .scope = Util.getScope(scope);
089: }
090:
091: public void setVar(String var) {
092: this .var = var;
093: }
094:
095: //*********************************************************************
096: // Tag logic
097:
098: public int doEndTag() throws JspException {
099: TimeZone timeZone = null;
100:
101: if (value == null) {
102: timeZone = TimeZone.getTimeZone("GMT");
103: } else if (value instanceof String) {
104: if (((String) value).trim().equals("")) {
105: timeZone = TimeZone.getTimeZone("GMT");
106: } else {
107: timeZone = TimeZone.getTimeZone((String) value);
108: }
109: } else {
110: timeZone = (TimeZone) value;
111: }
112:
113: if (var != null) {
114: pageContext.setAttribute(var, timeZone, scope);
115: } else {
116: Config.set(pageContext, Config.FMT_TIME_ZONE, timeZone,
117: scope);
118: }
119:
120: return EVAL_PAGE;
121: }
122:
123: // Releases any resources we may have (or inherit)
124: public void release() {
125: init();
126: }
127: }
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