com.purbon.kafka.topology.utils.Either Maven / Gradle / Ivy

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A helper project for Kafka Platform teams to build an automated Topic, Configuration, Schemas, and more, Management solution.

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package com.purbon.kafka.topology.utils;

import java.util.Optional;
import java.util.function.Function;

public class Either {
  private final L left;
  private final R right;

  private Either(L left, R right) {
    this.left = left;
    this.right = right;
  }

  public static  Either Left(L value) {
    return new Either(value, null);
  }

  public static  Either Right(R value) {
    return new Either(null, value);
  }

  public Optional getLeft() {
    return Optional.ofNullable(left);
  }

  public Optional getRight() {
    return Optional.ofNullable(right);
  }

  public boolean isLeft() {
    return left != null;
  }

  public boolean isRight() {
    return right != null;
  }

  public  Optional mapLeft(Function mapper) {
    if (isLeft()) {
      return Optional.of(mapper.apply(left));
    }
    return Optional.empty();
  }

  public  Optional mapRight(Function mapper) {
    if (isRight()) {
      return Optional.of(mapper.apply(right));
    }
    return Optional.empty();
  }

  public static  Function lift(CheckedFunction function) {
    return t -> {
      try {
        return Either.Left(function.apply(t));
      } catch (Exception ex) {
        return Either.Right(ex);
      }
    };
  }

  public String toString() {
    if (isLeft()) {
      return "Left(" + left + ")";
    }
    return "Right(" + right + ")";
  }
}