@Test
public void testFilterByClassName() {

  ResourceSet set = new ResourceSet();
  set.add(new Resource(new ResourceId("poo1", "resource1"), "value1"));
  set.add(new Resource(new ResourceId("poo1", "resource2"), new Integer(2)));
  assertEquals(1, set.filterByClassnameRegex(".*String").size());
  assertEquals(1, set.filterByClassnameRegex(String.class.getName()).size());
  assertEquals(1, set.filterByClassnameRegex(".*Integer").size());
  assertEquals(1, set.filterByClassnameRegex(Integer.class.getName()).size());
}