How do you marshall a parameterized type with JAX-WS / JAXB?
- by LES2
Consider the following classes (please assume public getter and setter methods for the private fields).
// contains a bunch of properties
public abstract class Person { private String name; }
// adds some properties specific to teachers
public class Teacher extends Person { private int salary; }
// adds some properties specific to students
public class Student extends Person { private String course; }
// adds some properties that apply to an entire group of people
public class Result<T extends Person> {
private List<T> group;
private String city;
// ...
}
We might have the following web service implementation annotated as follows:
@WebService
public class PersonService {
@WebMethod
public Result<Teacher> getTeachers() { ... }
@WebMethod
public Result<Student> getStudents() { ... }
}
The problem is that JAXB appears to marshall the Result object as a Result<Person> instead of the concrete type. So the Result returned by getTeachers() is serialized as containing a List<Person> instead of List<Teacher>, and the same for getStudents(), mutatis mutandis.
Is this the expected behavior? Do I need to use @XmlSeeAlso on Person?
Thanks!
LES
