Re: Apache Velocity : Verify if all substitutions are made

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Strict mode will also suffice for my needs. I am new to Velocity. I am
setting the runtime.reference.strict to true before init() like below

final var engine =3D new VelocityEngine();
engine.setProperty("runtime.references.strict", "true");
engine.init();

I want the Strict mode to be enabled only for some templates. So can this
be overwritten per context or I have to create two VelocityEngine instances
one with strict mode enabled and another without strict mode?

Another follow-up question on the same topic,  is it possible to also check
if all keys specified in VelocityContext are valid for a template. For
example, let's say I have a template, card.vm

card {
    type: CREDIT
    company: VISA
    name: "${firstName} ${lastName}"
  }

If I am then doing something like the below then the above code should
throw an error as cardNumber is not present in the card.vm


VelocityContext context =3D new VelocityContext();
context.put("firstName", "tuk");
context.put("lastName", "man");
*context.put("cardNumber", "1234");*
StringWriter writer =3D new StringWriter();
t.merge( context, writer );


On Wed, Jun 14, 2023 at 11:57=E2=80=AFAM Stefan Gro=C3=9Fhauser <
[email protected]> wrote:

>
> Hello,
>
> isn't the "strict mode" already what you want?
>
>
> https://velocity.apache.org/engine/devel/user-guide.html#strict-rendering=
-mode
>
> best regards
>
> Stefan
>
>
>
> * Von: * Debraj Manna <[email protected]>
> * An: * <[email protected]>
> * Gesendet: * 13.06.2023 11:38
> * Betreff: * Apache Velocity : Verify if all substitutions are made
>
> Can someone let me know how I can verify a velocity context against a
> template? Basically, I want to throw some error if all variables are not
> substituted in the velocity template.
>
> For example, let's say I have a velocity template, card.vm
>
>  card {
>    type: CREDIT
>    company: VISA
>    name: "${firstName} ${lastName}"
>  }
>
> The substitution is done like below
>
> VelocityEngine velocityEngine =3D new VelocityEngine();
> velocityEngine.init();
>
> Template t =3D velocityEngine.getTemplate("card.vm");
>
> VelocityContext context =3D new VelocityContext();
> context.put("firstName", "tuk");
> StringWriter writer =3D new StringWriter();
> t.merge( context, writer );
>
> In this case, I want to throw some error specifying that lastName is not
> replaced in template.
>
> Does velocity provide anything for this?
>
>
>
>
>
>
>
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