The scope of scripting variables from tags is specified in the Tag. From the 1.1 spec:
The defined values for scope are:
· NESTED, if the scripting variable is available between the start tag and the end tag
of the
action that defines it.
· AT_BEGIN, if the scripting variable is available from the start tag of the action
that
defines it until the end of the page.
· AT_END, if the scripting variable is available after the end tag of the action that
defines
it until the end of the page.
The scope value for a variable implies what methods may affect its value...
--------------------
So while declaring two id's the same is an error IMO, the specific tag <logic:iterate>
should probably be NESTED rather than AT_BEGIN (which is what's happening).
Checking the struts code (org.apache.struts.taglib.logic.IterateTei), it is indeed
declared as NESTED. Looks like a Jasper 2 bug then. Time for a few extra {}'s?
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: 18 June 2002 06:44
To: Tomcat Developers List; Kin-Man Chung
Subject: Re: Jasper2: serious problem with tag declarations
On Mon, 17 Jun 2002, Kin-Man Chung wrote:
> Costin,
>
> I am not aware that "id" attribute is handled differently in a tag.
> Can you give a test case for this? I can look into it more. Thanks.
I'll try to extract a test case.
There is nothing special about 'id' - just 2 consecutive struts
<logic:iterate id='foo' >. This generates a variable 'foo'
( via TLD/TagInfo/etc ), and the problem is that the variable foo is
declared twice ( there are 2 'Object foo;' in the same scope ).
I'm not very familiar with struts ( but you may find some
experts on this list :-), but unless I'm doing something very
stupid in the page, this issue may be serious.
Costin
>
> - Kin-man
>
> > Date: Mon, 17 Jun 2002 10:41:07 -0700 (PDT)
> > From: [EMAIL PROTECTED]
> > Subject: Jasper2: serious problem with tag declarations
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> >
> > I see some errors, not sure yet if it's an error in the taglibs or
> > jasper but seems serious. ( the taglibs are from struts ).
> >
> > There are few <logic:iterate id="foo" > tags in the page, using the
> > same id, and the generated code has:
> > Object foo;
> > ....
> >
> > Object foo;
> > ...
> >
> > That obviously doesn't compile.
> >
> > I don't know too much about struts, but I suppose it is valid to use
> > the same value in 2 tag attributes, couldn't find any reference on
> > the contrary in the spec.
> >
> > It workes fine with older jasper.
> >
> > Costin
> >
> >
> >
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