Implementing Sub-Resources for REST API

The next important task now is to implement the sub resources of the students and the courses resource. We want all the registrations of a particular student and all the registrations for a particular course.

Add the following method in the Course class,

@GET
@Produces(MediaType.APPLICATION_XML)
@Path("/{courseid}/registrations")
public List<Registration> getRegistrationWithCourseID(@PathParam("courseid") int courseID)
{		
	return registrationService.getRegistrationForCourse(courseID);	
}

and, add the following method in the Student class,

@Produces(MediaType.APPLICATION_XML)
@Path("/{studentid}/registrations")
public List<Registration> getRegistrationWithStudentsID(@PathParam("studentid") int studentID)
{
	return registraionService.getRegistrationsForStudent(studentID);
}