@Override
  public Class<?> getActionReturnType()
  {
    if (_resourceMethod.getMethodType() == ResourceMethod.ACTION)
    {
      return _resourceMethod.getActionReturnType();
    }
    return null;
  }
@Test
  public void testGetActionReturnType()
  {
    when(resourceMethod.getMethodType()).thenReturn(ResourceMethod.ACTION);
    Mockito.doReturn(String.class).when(resourceMethod).getActionReturnType();
    FilterRequestContext filterContext = new FilterRequestContextInternalImpl(context, resourceMethod, null);
    Assert.assertEquals(filterContext.getActionReturnType(), String.class);

    when(resourceMethod.getMethodType()).thenReturn(ResourceMethod.GET);
    Assert.assertNull(filterContext.getActionReturnType());
  }