Wildcard Consume javax.ws.rs

Question

Would like to accept all requests independent on the Content-Type set in header.

As an example a Content-Type can be application/json. By then setting:

@Consumes(MediaType.WILDCARD)

Will respond: HTTP 415 Unsupported Media Type

But if the consume is defined as a list with multiple items:

@Consumes({ MediaType.WILDCARD, MediaType.APPLICATION_SVG_XML })

The request is accepted: 200 OK

Any ideas why not the MediaType.WILDCARD accepts application/json?

Edit: Running javax.ws.rs-api-2.1.jar