Jax-RS请求映射到@DefaultValue和@QueryParam的操作

Question

I wonder how jax-rs (or Jersey as implementation) maps the client request to the actual operation while using @DefaultValue with @QueryParam .

Assume that you have the following operations in the resource, one returns all the resources and the other returns all with a custom view;

@Path(/v1)
public class MyResource {

    @GET
    @Path(/my-resource)
    public Response getAllResources(){
       ...
    }

    @GET
    @Path(/my-resource)
    public Response getAllResources(@QueryParam("view") @DefaultValue("simple") String view){
       ...
    }
}

In this case, if I call the service as /v1/my-resource , how the mapping would work internally and which operation is picked?

I appreciate if there's any explanation for this in the specification.

Thanks,

Tugcem.

Answer 1

As Paul correctly mentioned, you should not have more than 1 method for the same resource and web method (and acceptable media type). That's true for JAX-RS in general, not just some implementation. See JAX-RS spec:

3.7.2 Request Matching
...
If there is more than one maximum element, implementations SHOULD report a warning and select one of these types in an implementation dependent manner.