public <X> Either<A, B> fold(Action<A> fa, Action<B> fb) {
if (isLeft()) {
fa.apply(left.get());
return new Either<A, B>(left.get(), null);
} else if (isRight()) {
fb.apply(right.get());
return new Either<A, B>(null, right.get());
} else {
return new Either<A, B>(null, null);
}
}
public <X> Option<X> fold(Function<A, X> fa, Function<B, X> fb) {
if (isLeft()) {
return Option.maybe(fa.apply(left.get()));
} else if (isRight()) {
return Option.maybe(fb.apply(right.get()));
} else {
return (Option<X>) Option.none();
}
}
public Either<B, A> swap() {
A vLeft = null;
B vRight = null;
if (left.isDefined()) {
vLeft = left.get();
}
if (right.isDefined()) {
vRight = right.get();
}
return new Either<B, A>(vRight, vLeft);
}
