Re: Apache Velocity : Verify if all substitutions are made

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Any suggestions on my last email? The same has been asked in stackoverflow
also.

https://stackoverflow.com/q/76487506/785523

On Wed, Jun 14, 2023 at 9:51=E2=80=AFPM Debraj Manna <subharaj.manna@gmail.=
com>
wrote:

> 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} ${lastName}"
>   }
>
> If I am then doing something like the below then the above code should th=
row an error as cardNumber is not present in the card.vm
>
>
> VelocityContext context =3D new VelocityContext();
> context.put("firstName", "tuk");
> context.put("lastName", "man");
> *context.put("cardNumber", "1234");*
> StringWriter writer =3D new StringWriter();
> t.merge( context, writer );
>
>
> On Wed, Jun 14, 2023 at 11:57=E2=80=AFAM Stefan Gro=C3=9Fhauser <
> [email protected]> wrote:
>
>>
>> Hello,
>>
>> isn't the "strict mode" already what you want?
>>
>>
>> https://velocity.apache.org/engine/devel/user-guide.html#strict-renderin=
g-mode
>>
>> best regards
>>
>> Stefan
>>
>>
>>
>> * Von: * Debraj Manna <[email protected]>
>> * An: * <[email protected]>
>> * Gesendet: * 13.06.2023 11:38
>> * Betreff: * Apache Velocity : Verify if all substitutions are made
>>
>> Can someone let me know how I can verify a velocity context against a
>> template? Basically, I want to throw some error if all variables are not
>> substituted in the velocity template.
>>
>> For example, let's say I have a velocity template, card.vm
>>
>>  card {
>>    type: CREDIT
>>    company: VISA
>>    name: "${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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