gistfile1.txt

	public static Class<?> getGenericClass(Class<?> clazz) throws IllegalArgumentException {

		Type[] t = clazz.getGenericInterfaces();

		if (t.length == 0) {
			Class<?> parent = clazz.getSuperclass();
			if (parent == null) {
				throw new IllegalArgumentException(clazz.getName());
			}
			return getGenericClass(parent);
		}

		for (Type type : t) {
			if (type instanceof ParameterizedType) {
				ParameterizedType pt = (ParameterizedType) type;
				return (Class<?>) pt.getActualTypeArguments()[0];
			}
		}

		throw new IllegalStateException();

	}