Re: Having trouble using JAX-RS annotation in Kawa Scheme class

[Ross Merrifield <rosswmerrifield@gmail.com>]

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Arvydas,

Adding the explicit value: still results in the "annotation value must be a
constant" error. I tried building Kawa from a git clone with Ant, but that
too is failing. I errors out during build of srfi14.scm due to a missing
file: char-tables.iscm

I'm open to suggestions, but I'll just try to work around this issue for
the time being.

Thanks,

Ross

On Tue, Feb 28, 2023 at 9:37 AM Arvydas Silanskas <
nma.arvydas.silanskas@gmail.com> wrote:

> Hi,
>
> try specifying the annotation field explicitly, ie `(@Produces value:
> (string[] "text/plain"))`. Test suite seems to have a test for this case
> https://gitlab.com/kashell/Kawa/-/blob/master/testsuite/annotations1.scm#L33
> . If this still doesn't work, perhaps try building and running the head
> version from source.
>
> Arvydas
>
> 2023-02-28, an, 19:02 Ross Merrifield via Kawa <kawa@sourceware.org> rašė:
>
>> Kawa mailing list,
>>
>> I am attempting to translate a simple JAX-RS example from Java to Kawa
>> Scheme. Overall, this has been successful, but I am having issues getting
>> the @Produces method annotation to work in one of my classes.
>>
>> Here is my Kawa class:
>>
>> (import (class jakarta.ws.rs  GET
>>                               Path
>>                               Produces))
>>
>> (define-simple-class MyResource ()
>>   (@Path "helloworld")                    ;;class annotations
>>
>>   ((getIt)                                ;;method (no args)
>>     (@GET)                                ;;method annotations
>>     (@Produces (String "text/plain"))
>>     ::java.lang.String                    ;;return type
>>     "Got it!")                            ;;method body
>> )
>>
>> And here is the Java class I am translating it from:
>>
>> import jakarta.ws.rs.GET;
>> import jakarta.ws.rs.Path;
>> import jakarta.ws.rs.Produces;
>>
>> @Path("helloworld")
>> public class MyResource {
>>     @GET
>>     @Produces("text/plain")
>>     public String getHello() {
>>         return "Hello World!";
>>     }
>> }
>>
>> The problem is, when I try to load the code, I get an error that "the type
>> java.lang.String is incompatible with the required type
>> java.lang.String[]".
>> But when I change my Annotation to (@Produces (String[] "text/plain")) I
>> get the error "annotation value must be constant". Checking the javadoc
>> for
>> @prodcues does indicate the expected type of the value is String[]:
>>
>>
>> https://javadoc.io/doc/jakarta.ws.rs/jakarta.ws.rs-api/latest/jakarta.ws.rs/jakarta/ws/rs/Produces.html
>>
>> Is there another syntax I should be trying here? As it stands now, it
>> seems
>> to me like it's impossible to use this annotation from Kawa.
>>
>> Thanks,
>>
>> Ross
>>
>