Method returns number of inheritance hops between parent and subclass

For example.

class A {
}
class B extends A {
}
class C extends B {
}

int d;
d = InheritanceUtils.distance(A.class, A.class);
Assert.assertEquals(0, d);
d = InheritanceUtils.distance(B.class, A.class);
Assert.assertEquals(1, d);
d = InheritanceUtils.distance(C.class, A.class);
Assert.assertEquals(2, d);