Dynamically adding macros?

[Tiho Lupak <tl...@yahoo.com>]

Is it possible to dynamically add new macros to a running Velocity instance ?
Or at least new macro names to an existing one?

Right now there's a static macro in macros.vm that does something like this:
----------
#macro( writeList $list)
    #foreach($item in $list)
        $item
    #end
#end
----------

In HTML pages (from the VelocityServlet), users write something like:
---------
.....
#writeList($my_list_one)
.....
#writeList($our_list_two)
......
---------

The HTML pages are however user written code, and the above syntax is always subject to errors.
A proposed change from the users would be to allow to have instead pages like:
----------
.....
#my_list_one
.....
#our_list_two
.....
----------
but "my_list_one" and "our_list_two" are known only at runtime.

Is this possible with Velocity at all?

Thank you very much,
Tilo.



      


---------------------------------------------------------------------
To unsubscribe, e-mail: user-unsubscribe@velocity.apache.org
For additional commands, e-mail: user-help@velocity.apache.org

Re: Dynamically adding macros?

[Nathan Bubna <nb...@gmail.com>]

On Thu, Jun 19, 2008 at 6:31 AM, Tiho Lupak <tl...@yahoo.com> wrote:
> Is it possible to dynamically add new macros to a running Velocity instance ?
> Or at least new macro names to an existing one?

Yes to both questions.  You just need to adjust your settings.  See
the "Velocimacro" section here:

http://velocity.apache.org/engine/releases/velocity-1.5/developer-guide.html#velocity_configuration_keys_and_values

> Right now there's a static macro in macros.vm that does something like this:
> ----------
> #macro( writeList $list)
>    #foreach($item in $list)
>        $item
>    #end
> #end
> ----------
>
> In HTML pages (from the VelocityServlet), users write something like:
> ---------
> .....
> #writeList($my_list_one)
> .....
> #writeList($our_list_two)
> ......
> ---------
>
> The HTML pages are however user written code, and the above syntax is always subject to errors.
> A proposed change from the users would be to allow to have instead pages like:
> ----------
> .....
> #my_list_one
> .....
> #our_list_two
> .....
> ----------
> but "my_list_one" and "our_list_two" are known only at runtime.
>
> Is this possible with Velocity at all?
>
> Thank you very much,
> Tilo.
>
>
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@velocity.apache.org
> For additional commands, e-mail: user-help@velocity.apache.org
>
>

---------------------------------------------------------------------
To unsubscribe, e-mail: user-unsubscribe@velocity.apache.org
For additional commands, e-mail: user-help@velocity.apache.org