java.beans.Introspector getBeanInfo does not pickup any superinterface's properties

Question

I just noticed that java.beans.Introspector getBeanInfo does not pickup any superinterface's properties. Example:

public interface Person {
    String getName();
}
public interface Employee extends Person {
    int getSalary();
}

Introspecting on Employee only yields salary even though name is inherited from Person.

Why is this? I would rather not have to use reflection to get all the getters.

Answer 1

This issue is covered in Sun bug java.beans.Introspector doesn't work for interfaces

Answer 2

The Java VM does not support this out of the box as Phil wrote. I also needed this and implemented a helper class as part of Diergo Utils 1.5.

Answer 3

Try using

public static BeanInfo getBeanInfo(Class<?> beanClass, Introspector.USE_ALL_BEANINFO);

and see if this yields the result you're looking for.

Answer 4

In such a case, you should write a custom BeanInfo class.