Adolfo, The problem with putting or implementing a tag that performs complex AND, ORs, NOT expressions, is that getting the data for those expressions to work on could be tricky. There are just so many places that the data can come from (page, request, session, application, beans, custom api calls), there are too many.
The expression parser would turn into a language of it's own. Besides, when ever someone wants to do such complicated expressions in JSP, one has to wonder if it's business logic that's being coded in the JSP page. In most of my development work, the JSP pages simply present the data to the user. The kind of comparisons I do, are quite basic. Is the data there or not (is it null?), or is this value equals to another value. But that's about the extent of it. If you want more complicated conditions being evaluated, do that in your action. Then, have the action put the result in the request context, and forward to the JSP page for displaying. On your JSP page, you can easily check if a particular request attribute is set to TRUE or FALSE and make your decision. Good luck. -AP_ http://www.alexparansky.com Java/J2EE Architect/Consultant http://www.myprofiles.com/member/view.do?profileId=127 -----Original Message----- From: Adolfo Miguelez [mailto:[EMAIL PROTECTED]] Sent: Monday, April 15, 2002 11:41 AM To: [EMAIL PROTECTED] Subject: comparations with OR, AND, NOT... in CustomTags Hi All, does anyone know how to make complex comparations in JSP by means of same Custom Tag? I mean, ANDs, ORs, NOT... or compound conditions. Thanks in advance, Adolfo. _________________________________________________________________ Send and receive Hotmail on your mobile device: http://mobile.msn.com -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
