?? timezonetag.java
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/*
* Copyright 1999,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.taglibs.datetime;
import java.util.*;
import java.text.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
/**
* JSP Tag <b>timeZone</b>, used to set the client timeZone for
* the SESSION as a script variable.
* <p>
* The TimeZone ID String is obtained from the body of the tag.
* If there is no TimeZone ID String, the server default timeZone is used.
* <p>
* JSP Tag Lib Descriptor
* <p><pre>
* <name>timeZone</name>
* <tagclass>org.apache.taglibs.datetime.TimeZoneTag</tagclass>
* <bodycontent>JSP</bodycontent>
* <info>Creates a SESSION script variable for clients time zone.</info>
* <attribute>
* <name>id</name>
* <required>true</required>
* <rtexprvalue>false</rtexprvalue>
* </attribute>
* </pre>
*
* @author Glenn Nielsen
*/
public class TimeZoneTag extends BodyTagSupport
{
/**
* Method called at start of tag, always returns EVAL_BODY_TAG
*
* @return EVAL_BODY_TAG
*/
public final int doStartTag() throws JspException
{
return EVAL_BODY_TAG;
}
/**
* Method called at end of timeZone tag body.
*
* @return SKIP_BODY
*/
public final int doAfterBody() throws JspException
{
// Use the body of the tag as input for the timeZone
BodyContent body = getBodyContent();
String s = body.getString().trim();
// Clear the body since we only use it to set the timeZone
body.clearBody();
TimeZone tz = TimeZone.getTimeZone(s);
if( tz == null )
tz = TimeZone.getDefault();
pageContext.setAttribute(id,tz,PageContext.SESSION_SCOPE);
return SKIP_BODY;
}
/**
* Method called at end of Tag
*
* @return EVAL_PAGE
*/
public final int doEndTag() throws JspException
{
return EVAL_PAGE;
}
}
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