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Posted to users@tomcat.apache.org by Wei Zhao <we...@yahoo.com.cn> on 2005/09/14 01:00:49 UTC

Scripting variable is not generated

I am migrating some code from tomcat 4.* to 5.5.
However, I got some compilation error regarding the
scripting variable from taglib.

This is the definition of the scripting variable in
TEI file:

VariableInfo vSystemName = new VariableInfo(
"SystemName",
           	"String",
           	true,
           	VariableInfo.AT_END
   	);

This is how this tag is used in the JSP page:

If( some condition )
{
	<system:getSystemName/>
	<%=SystemName%>
}
else
{
	<system:getSystemName/>
	<%=SystemName%>
}

But a got a Java compilation error saying the second
SystemName cannot be resolved.
I looked into the generated java code and it seems
that only one SystemName is declared which is within
the “if” and not visible in the “else”.  If I
remove the “system:getSystemName” inside if,
“SystemName” is now declared inside “else”. 

This works differently from Tomcat 4.* which always
generate the declaration of the “SystemName” in
above case. And I don’t think it’s consistent with
the spec. The variable is defined as “AT_END”
scope and “declare” is set to true. So it should
always be declared or a lot of existing code will be
broken.

Any thoughts? Did I miss anything?

Thanks

Wei




		
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RE: Scripting variable is not generated

Posted by Wei Zhao <we...@yahoo.com.cn>.
Hi Mark:

Thank you for your response. That definitely answered my question. 

Do you know what's the status on this issue? Is Tomcat not going to support the relevant code before 4.1? It will be a huge effort (if possible) to work around the problem using either of the ways described in the bug entries you provided.

Thanks

Wei

-----Original Message-----
From: Mark Thomas [mailto:markt@apache.org] 
Sent: Tuesday, September 13, 2005 11:09 PM
To: Tomcat Users List
Subject: Re: Scripting variable is not generated

Have a look at http://issues.apache.org/bugzilla/show_bug.cgi?id=21390 
and http://issues.apache.org/bugzilla/show_bug.cgi?id=23425

Mark

Wei Zhao wrote:
> I am migrating some code from tomcat 4.* to 5.5.
> However, I got some compilation error regarding the
> scripting variable from taglib.
> 
> This is the definition of the scripting variable in
> TEI file:
> 
> VariableInfo vSystemName = new VariableInfo(
> "SystemName",
>            	"String",
>            	true,
>            	VariableInfo.AT_END
>    	);
> 
> This is how this tag is used in the JSP page:
> 
> If( some condition )
> {
> 	<system:getSystemName/>
> 	<%=SystemName%>
> }
> else
> {
> 	<system:getSystemName/>
> 	<%=SystemName%>
> }
> 
> But a got a Java compilation error saying the second
> SystemName cannot be resolved.
> I looked into the generated java code and it seems
> that only one SystemName is declared which is within
> the “if” and not visible in the “else”.  If I
> remove the “system:getSystemName” inside if,
> “SystemName” is now declared inside “else”. 
> 
> This works differently from Tomcat 4.* which always
> generate the declaration of the “SystemName” in
> above case. And I don’t think it’s consistent with
> the spec. The variable is defined as “AT_END”
> scope and “declare” is set to true. So it should
> always be declared or a lot of existing code will be
> broken.
> 
> Any thoughts? Did I miss anything?
> 
> Thanks
> 
> Wei
> 
> 
> 
> 
> 		
> __________________________________ 
> Yahoo! Mail - PC Magazine Editors' Choice 2005 
> http://mail.yahoo.com
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
> 
> 
> 



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Re: Scripting variable is not generated

Posted by Mark Thomas <ma...@apache.org>.
Have a look at http://issues.apache.org/bugzilla/show_bug.cgi?id=21390 
and http://issues.apache.org/bugzilla/show_bug.cgi?id=23425

Mark

Wei Zhao wrote:
> I am migrating some code from tomcat 4.* to 5.5.
> However, I got some compilation error regarding the
> scripting variable from taglib.
> 
> This is the definition of the scripting variable in
> TEI file:
> 
> VariableInfo vSystemName = new VariableInfo(
> "SystemName",
>            	"String",
>            	true,
>            	VariableInfo.AT_END
>    	);
> 
> This is how this tag is used in the JSP page:
> 
> If( some condition )
> {
> 	<system:getSystemName/>
> 	<%=SystemName%>
> }
> else
> {
> 	<system:getSystemName/>
> 	<%=SystemName%>
> }
> 
> But a got a Java compilation error saying the second
> SystemName cannot be resolved.
> I looked into the generated java code and it seems
> that only one SystemName is declared which is within
> the “if” and not visible in the “else”.  If I
> remove the “system:getSystemName” inside if,
> “SystemName” is now declared inside “else”. 
> 
> This works differently from Tomcat 4.* which always
> generate the declaration of the “SystemName” in
> above case. And I don’t think it’s consistent with
> the spec. The variable is defined as “AT_END”
> scope and “declare” is set to true. So it should
> always be declared or a lot of existing code will be
> broken.
> 
> Any thoughts? Did I miss anything?
> 
> Thanks
> 
> Wei
> 
> 
> 
> 
> 		
> __________________________________ 
> Yahoo! Mail - PC Magazine Editors' Choice 2005 
> http://mail.yahoo.com
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tomcat-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tomcat-user-help@jakarta.apache.org
> 
> 
> 



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