Jersey / JAX-RS ExceptionMappers and Inheritance

I am using Jersey / JAX-RS to implement a RESTful web service. I have a question about an ExceptionMapper

interface that is not documented anywhere.

Let's say I have the following custom (extend RuntimeException

) exceptions:

• FizzException extends RuntimeException
  
  
• BuzzException extends FizzException
  
  

Now let's say that I want my exception handlers to do the following Exception

-to- mappings Response

:

• FizzException
  
  actually maps to HTTP 404 NOT FOUND
• BuzzException
  
  maps to HTTP 403 UNAUTHORIZED
• Anything else displays an HTTP 500 INTERNAL SERVER ERROR error

So, if I understood the API correctly, I need to implement 3 different Exception Mapping Agents:

@Provider
public class DefaultExceptionMapper implements ExceptionMapper<Exception> {
    @Override
    Response toResponse(Exception exc) {
        // Map to HTTP 500
    }
}

@Provider
public class FizzExceptionMapper implements ExceptionMapper<FizzException> {
    @Override
    Response toResponse(Exception exc) {
        // Map to HTTP 404
    }
}

@Provider
public class BuzzExceptionMapper implements ExceptionMapper<BuzzException> {
    @Override
    Response toResponse(Exception exc) {
        // Map to HTTP 403
    }
}

      

        
        
        
      

    

However, I am curious: since we have inheritance of the class of exceptions, which are actually being collected? For example:

• BuzzException
  
  extends FizzException
  
  , which ultimately extends Exception
  
  . So, if you select a BuzzException
  
  , which will cause the display device: BuzzExceptionMapper
  
  , FizzExceptionMapper
  
  or DefaultExceptionMapper
  
  ?
• Another way: when selected Exception
  
  , since a BuzzException
  
  is ultimately Exception
  
  which mapper: runs BuzzExceptionMapper
  
  , FizzExceptionMapper
  
  or DefaultExceptionMapper
  
  ?