Darren James wrote:
What I was more interested in is some guidelines similar to what
Joachim posted in writing a "struts2" tag. And by that I mean one of
those generic, technology independent beasts that can be used in
Freemarker and Velocity as well as JSP.
I don't know how one writes freemarker tags or velocity tags. I haven't
studied Joachim's example in detail, but it didn't appear to be
answering your question. It appeared to me that it was an example of
"how to write a tag that is implemented by freemarker" rather than "how
to write a tag that is callable from freemarker".
If you're going to have a theme system, and want to be able to swap out
templates at will, this is a reasonable solution. If you just want a
standard tag, I see no reason to call on a templating system inside the tag.
You should also be aware that the simplest way to implement a
templatable tag (using jsp) is using a .tag file and a tagdir. No java
code required.
-Dale
P.S.: Potentially useful pages if you need to call this tag from
freemarker or velocity:
http://freemarker.org/docs/dgui_misc_userdefdir.html
http://velocity.apache.org/engine/releases/velocity-1.5/user-guide.html#velocimacros
P.P.S: If your question is really "how do i evaluate tag arguments that
are really ognl expressions, then TagUtils.getStack() is probably what
you're looking for:
http://struts.apache.org/2.x/struts2-core/apidocs/org/apache/struts2/views/jsp/TagUtils.html
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