HV does not validate NotNull constraint on rest resources

[Postremus]

Describe the bug

I have a resource defined like this:

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String getHello(@NotNull @QueryParam("param") String param) {
        return param;
    }

In my tests, I do not fill this QueryParam, and would therefore expect to get a response code 400 for this rest call.
However, I do get an 204er, indicating that:

• the method was executed
• and the param was null (null is mapped to status code 204)

This happens with resteasy classic, as well as with resteasy reactive.

I also tested this with BeanParams and with MultipartFormData. In both cases I explicitly left a field as null, but I never got a 400 response code.

@NotBlank in place of the @NotNull constraints works as expected - 400 is returned as status code, with a violation.

Expected behavior

NotNull should behave like NotBlank
For example, In case of NotBlank following violation is returned - I would expect similar for NotNull.

{
    "title": "Constraint Violation",
    "status": 400,
    "violations": [
        {
            "field": "hello.arg0.text",
            "message": "must not be blank"
        }
    ]
}

NotNull should work on rest resources, since it is used as an example in the spec. https://jakarta.ee/specifications/restful-ws/3.0/jakarta-restful-ws-spec-3.0.html#validation

Actual behavior

Right now, no violation, and no 400 status code ist returned for @NotNull on QueryParam, BeanParam, and MultiPartForm, for resteasy classic and reactive.

To Reproduce

Steps to reproduce the behavior:

1. Download the reproducer: rr-bean-validation.zip
2. Execute the test class GreetingResourceTest. All of the tests expect status code 400, but 204 is returned.
3. Now, replace every NotNull constraint with NotBlank
4. Execute the tests again, they should all be green now.

Environment (please complete the following information):

Output of uname -a or ver

Linux martin 5.8.0-48-generic #54~20.04.1-Ubuntu SMP Sat Mar 20 13:40:25 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

Output of java -version

openjdk version "15.0.1" 2020-10-20
OpenJDK Runtime Environment Zulu15.28+13-CA (build 15.0.1+8)
OpenJDK 64-Bit Server VM Zulu15.28+13-CA (build 15.0.1+8, mixed mode, sharing)

Quarkus version or git rev

1.13.1.Final

Build tool (ie. output of mvnw --version or gradlew --version)

Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: /home/martin/.sdkman/candidates/maven/current
Java version: 15.0.1, vendor: Azul Systems, Inc., runtime: /home/martin/.sdkman/candidates/java/15.0.1-zulu
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.8.0-48-generic", arch: "amd64", family: "unix"

[Postremus]

I am closing this issue, Just noticed that I Imported import io.smallrye.common.constraint.NotNull; instead of the javax.validation one...