[CXF-7647] MethodDispatcher may return invalid method for OperationResourceInfo object

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.2.2
• Component/s: JAX-RS
• Estimated Complexity: Unknown
• Assignee: Unassigned
• Reporter: Martin Basovnik
• Created: 15/Feb/18 15:40
• Updated: 30/Apr/19 08:57

Description

Imagine the following JAX-RS resource classes:

public interface VersionedResource<CDTO, UDTO, ID extends RequestParam<UUID>> extends Resource<CDTO, ID> {

    Response update(ID idParam, IfMatchHeader ifMatchHeader, UDTO updateDto);

    @Deprecated
    default Response updateByPost(ID idParam, IfMatchHeader ifMatchHeader, UDTO updateDto) {
        return update(idParam, ifMatchHeader, updateDto);
    }

}

@Path(BASE_PATH + USERS_PATH)
public interface UserResource extends VersionedResource<UserCreateDto, UserUpdateDto, UserIdParam> {

    ...
    
    @PATCH
    @Path(UserId.PATH)
    @Override
    Response update(
            @BeanParam UserIdParam userIdParam,
            @BeanParam IfMatchHeader ifMatchHeader,
            @Valid UserUpdateDto userUpdateDto
    );

    @POST
    @Path(UserId.PATH)
    @Override
    default Response updateByPost(
            @BeanParam UserIdParam userIdParam,
            @BeanParam IfMatchHeader ifMatchHeader,
            @Valid UserUpdateDto userUpdateDto) {
        return VersionedResource.super.updateByPost(userIdParam, ifMatchHeader, userUpdateDto);
    }
    
    ...
    
}

MethodDispatcher contains its internal collections in non-deterministic order.
There are two mappings for method updateByPost and two possible returned methods:

a)

public default Response UserResource.updateByPost(RequestParam, IfMatchHeader, java.lang.Object)

RequestParam is abstract class which results in InstantiationException later.

b)

public default Response UserResource.updateByPost(UserIdParam, IfMatchHeader, java.lang.Object)

In this case everything works.

Is it possible to somehow detect overridden methods and filter them from evaluation?