SwitchCreator.java

SwitchCreator.java

public class SwitchCreator {
    private final SwitchType switchType;
    public SwitchCreator(SwitchType switchType) {
        this.switchType = switchType;
    }

    public <T, R> R create(
            T arg,
            Predicate<T> leftFilter, Function<T, R> leftAction,
            Predicate<T> rightFilter, Function<T, R> rightAction,
            Function<T, R> elseAction
    ) {
        if (this.switchType == SwitchType.left && leftFilter.test(arg)) {
            return leftAction.apply(arg);
        } else if (this.switchType == SwitchType.right && rightFilter.test(arg)) {
            return rightAction.apply(arg);
        } else {
            return elseAction.apply(arg);
        }
    }

    public <T, R> R create(
            T arg,
            Function<T, R> leftAction,
            Function<T, R> rightAction,
            Function<T, R> elseAction
    ) {
        return create(
                arg,
                (m) -> true, leftAction,
                (m) -> true, rightAction,
                elseAction
        );
    }

    public enum SwitchType {
        left, right, other;
    }
}