Re: Extensions to allow introspection of Freemarker template

Hello Christopher,

Do you want to parse the freemarker HTML to pull out the freemarker
variable references so you can create a data model that will work for any
given freemarker template?  I can see why you'd want to do that.  You need
want to live with some restrictions in terms of what you might pick up
automatically by introspection.

In our case, what we do is define the data model separately in an XML file,
such that the data model matches what the form expects.  From that data
model, we generate a form that a user can fill out, and from that form
input we generate the data model which will match what the HTML expects (in
terms of Freemarker variable references).

Hope that helps!

David


On Tue, May 27, 2014 at 6:58 AM, Wong, Christopher <[email protected]>
wrote:

>  I work with user-submitted templates, and would like Freemarker support
> some form of introspection of a template. For example, I might want to know
> what identifiers the template will request from the model. Freemarker
> already has something very close to this: the public method
> Template.getRootTreeNode exposes a DOM-like structure the end user.
> Unfortunately, the TemplateElement classes that comes back are mostly not
> visible to the public.
>
>
>
> Since I'd rather not fork an internal copy of Freemarker, I'd like to
> explore the possibility of contributing changes to the Freemarker project
> to enable template introspection. I want to see if there's an approach that
> the maintainers will find acceptable.
>
>
>
> 1) The easiest way to accomplish this is to make the TemplateElement
> hierarchy public and add public getters to these classes. On the other
> hand, this might expose more than you'd like. 2) You have implemented
> similar functionality by having this class implement the TreeNode interface
> to expose this tree as a Swing component. Perhaps a separate interface
> hierarchy will provide acceptable decoupling?
>
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