mlc

/* Base fragment to ensure the parent activity implements a contract interface. */
public abstract class ContractFragment<T> extends Fragment {
    private T mContract;

    @Override
    public void onAttach(Activity activity) {
        if (!((Class)((ParameterizedType)getClass().getGenericSuperclass()).getActualTypeArguments()[0]).isAssignableFrom(activity.getClass()))
            throw new IllegalStateException(activity.getClass().getSimpleName()
                    + " does not implement " + getClass().getSimpleName() + "'s contract interface.");