invoke a method which is returning an object of generic list class type throws java.lang.IllegalArgumentException

public class SpinnerItemAdapter<T extends BaseSpinnerItem> 
                                  extends BaseAdapter 
                                  implements ISpinnerItemAdapter<T> {

    private List<T> _baseSpinnerItemList;

    public List<T> getSpinnerItems() {
        return _baseSpinnerItemList;
    }
}

SpinnerItemAdapter.class.getMethod("getSpinnerItems", new Class[] {}) // ok 
 .invoke(new SpinnerItemAdapter<BaseSpinnerItem>(),null) // throws bellow exception

Method threw 'java.lang.IllegalArgumentException' exception.

why fails ?

edit in reply:

** isn't the invoke suppose to be... (INSTANCE OF THAT CLASS, ANY PAREMETERS) – 3kings

 /**
 * @param receiver
 *            the object on which to call this method (or null for static methods)
 * @param args
 *            the arguments to the method
 * @return the result
 *
 * @throws NullPointerException
 *             if {@code receiver == null} for a non-static method
 * @throws IllegalAccessException
 *             if this method is not accessible (see {@link AccessibleObject})
 * @throws IllegalArgumentException
 *             if the number of arguments doesn't match the number of parameters, the receiver
 *             is incompatible with the declaring class, or an argument could not be unboxed
 *             or converted by a widening conversion to the corresponding parameter type
 * @throws InvocationTargetException
 *             if an exception was thrown by the invoked method
 */
public native Object invoke(Object receiver, Object... args)
        throws IllegalAccessException, IllegalArgumentException, InvocationTargetException;