In several places, I have some code that looks like the following, the only difference is in the type of listener.

public class CustomFragment extends android.app.Fragment {
    SomeListener listener;

    @Override
    public void onAttach(android.app.Activity activity) {
        super.onAttach(activity);

        // duplication
        //     ||
        //    \||/
        //     \/
        try {
            listener = (SomeListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString()
                    + " must implement SomeListener");
        }
    }
}

To avoid duplication, I wrote this simple class:

public class TypeConvertor {
    private final Object whatNeedToCast;

    public static TypeConvertor cast(Object whatNeedToCast) {
        return new TypeConvertor(whatNeedToCast);
    }

    private TypeConvertor(Object whatNeedToCast) {
        this.whatNeedToCast = whatNeedToCast;
    }

    public <OtherType> OtherType to(Class<OtherType> toWhichToCast) {
        try {
            return (OtherType) whatNeedToCast;
        } catch (ClassCastException e) {
            throw new ClassCastException(
                    whatNeedToCast.toString() + " must implement " + toWhichToCast.getName()
            );
        }
    }
}

And the previous code is simplified to the following:

public class CustomFragment extends android.app.Fragment {
    SomeListener listener;

    @Override
    public void onAttach(android.app.Activity activity) {
        super.onAttach(activity);
        listener = TypeConvertor.cast(activity).to(SomeListener.class);
    }
}

But I do not like name TypeConvertor. Help me pick a better name (and help refactor this simple class if needed).