how to access a constant from JSTL

[Chitti pokala]

Hi
I have a constant

public static final long PIN = 1;
which I am using in my jsp
var pin_no = -> %=CONSTANTS.PIN% -<

I am testing like this
-> c:if test="${form.state == pin_no}" -<

But I am not able to get the value.

Please let me know how to do access a constant in the JSP.

Thanks.

[Bear Bibeault]

You cannot reference either a constant or a scripting variable from the EL. You will need to set the value as a scoped variable for it to become EL-accessbile.

[Chitti pokala]

can you please let me know what is scoped variable?

Thanks in advance.

[Gregg Bolinger]

Bear, didn't you have an excellent Journal entry on this very topic here?

[Bear Bibeault]

Beat me to it! Was looking for the link...

A scoped variable is an object placed into one of the scoped contexts using that context's setAttribute() method.
[ September 12, 2005: Message edited by: Bear Bibeault ]

[Chitti pokala]

Hi
I am accessing the constant from an Interface not from a class.
Please let me know how to access a constant from an interface within JSTL.

Thanks in advance.

[Gregg Bolinger]

Originally posted by Chitti pokala:
Hi
I am accessing the constant from an Interface not from a class.
Please let me know how to access a constant from an interface within JSTL.

Thanks in advance.

You cannot reference either a constant or a scripting variable from the EL. You will need to set the value as a scoped variable for it to become EL-accessbile.

Which would mean that somewhere you would need to set that constant as a scoped variable. For example...

session.setParameter("someValue", YourInterface.YOUR_CONSTANT);

Then you can access someValue in your JSP via EL/JSTL.