EL and ? : construct

[DenisS Simpson]

I am trying to do something like this
${true ? 'A': 'B'}

but I get an error

An error occurred while evaluating custom action attribute "value" with value "${true ? 'A' : 'B'}": Encountered "?", expected one of ["}", ".", ">", "gt", "<", "lt", "==", "eq", "<=", "le", ">=", "ge", "!=", "ne", "[", "+", "-", "*", "/", "div", "%", "mod", "and", "&&", "or", "||"] (null)

According to O'Reilly's "JavaServer Pages" condition ? ifTrue : ifFalse operator is allowed. Is book wrong?

PS I am using WebLogic

[Bear Bibeault]

What version of JSP are you using? The ternary operator was introduced to the EL with JSP 2.0.

[DenisS Simpson]

JSP 2.0
Running on WebLogic 8

[Bear Bibeault]

Should work then. I use it regularly on Tomcat 5 and Resin 3.

Is your web.xml declared as a Servlets 2.4 deployment descriptor? If not, the EL shouldn't be enabled on the pages at all, but I don't know how closely weblogic follows the JSP 2.0 spec and it might just be using some weird pre-JSP 2.0 compatability mode.

[DenisS Simpson]

I don't have an entry for Servlets 2.4 descriptor.

[Bear Bibeault]

See this JSP FAQ entry.
[ February 10, 2006: Message edited by: Bear Bibeault ]