geirm 01/04/18 06:34:24
Added: contrib/temporary/struts-velocity notes.txt
Log:
Stream-of-consciousness notes... stuff I want to come back to. But time
is scarce and Vel comes first :)
Revision Changes Path
1.1 jakarta-velocity/contrib/temporary/struts-velocity/notes.txt
Index: notes.txt
===================================================================
Misc Notes
==========
Context 'Scope'
--------------
JSP has this notion of three levels of scope for passing data
through to the JSP - context, session and request (hereafter c/s/r)
Now, there is no such notion in Vel, but it's important to the JSP
crowd, for now anyway :)
So, maybe the solution is two-fold :
when taking c/s/r elements to package into the context, maybe the solution is :
- make a new VC c/s/r
- chain them : VC(r) = new VC( VC(s) = new VC(c)) so r masks s masks c
- also, place those VC's independantly into the context
$struts.context
$struts.session
$struts.request
- we can also wrap in VMs :
#context( <key> )
#session( <key> )
#request( <key> )
or something
Beanification of Tags
---------------------
It would be nice to map the tags into VMs. Currently there are two tags
that have been velocitized, <bean:message -> $message and
<html:errors -> $errors.getErrors()
A nice solution would be auto-generation of the bean mappings at startup, so it
can do it from the standard struts configuration files. Not sure how easy this
is, but I think it can be done.
ex.
<bean:message -> #message_bean( <key> )
<html:errors -> #errors_html( <key> )
something like that. I hope it can be done automatically.
The problem will be things that expect a body, like
<logic:equals
In Velocity, we can finagle it so
#if( #equals_logic( ) )
....
#end
does the right thing. That shouldn't be hard.
