You can achieve this via template magic already:
${variableB!r"${variableB}"}
On Mon, Sep 18, 2023 at 7:03 PM Christoph Rüger <c.rue...@synesty.com>
wrote:
> Hi,
> we may have a rather special case and are looking for ideas.
> We would like to to keep the placeholders as they are in case of null
> values.
>
> Assume the following template:
>
> ${metaHeaderDataA}
> ${variableB}
>
> We would like the following behavior:
>
> *1st render phase:*
> data.put("metaHeaderDataA", "foo")
> environment.process(template);
>
> Expected Output:
> foo
> ${variableB}
>
> The we want to render this output again with:
>
> *2nd render phase:*
> data.put("variableB", "bar")
> environment.process(template);
>
> Expected final Output:
> foo
> bar
>
> As you see there 2 two rendering phases involved. In phase 1 only some
> variables are known (metaHeaderDataA).
> The other variables come later.
> We would like keep the placeholders in the 1st rendering phase, if there is
> no value or null value in the data model, so that they can be rendered
> later.
>
> I think this is very special.
> So I am just thinking, is this something which could (theoretically) be a
> configurable option maybe on a per-Template-object level (Java Code)? Or is
> this something impossible to do?
>
> Or any other workaround ideas?
>
>
> Thanks
> Christoph
>
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