Read more about Either from VAVR

[jabrena]

• https://jherrlin.github.io/posts/error-handling-with-either/
• https://github.com/mtumilowicz/java11-vavr-either/blob/master/src/test/java/EitherInstanceMethodsTest.java
• https://github.com/search?q=owner%3Amtumilowicz+Either+language%3AJava&type=code&l=Java

[jabrena]

• https://github.com/aol/cyclops-integration/blob/fa6dd7eefb865568c849fca139fbababae76d1b9/cyclops-vavr/src/main/java/cyclops/companion/vavr/Queues.java#L77

[jabrena]

private List getBuildsForSpecificRepos(Collection repositories) { return repositories.parallelStream() .map(this::fetchBuilds) .filter(Either::isLeft) .map(Either::getLeft) .flatMap(item -> item.getBuilds().stream()) .collect(Collectors.toList()); }

[jabrena]

public Either<String, Integer> properFlatMapOfEither(String age) { Either<String, String> outerEither = Option .of(age) .map(Either::<String, String>right) .getOrElse(Either.left("empty"));

Either<String, Integer> flattened = outerEither
  .flatMap(e -> eitherWrapper(e));

return flattened;

}

[jabrena]

private Either<ContractViolation, Tuple2<Section, Constraint>> findSectionInDocument( SectionConstraint sectionConstraint) { return sections().stream() .filter(sectionConstraint::matches) .map(section -> Tuple.of(section, sectionConstraint.getConstraint())) .findAny() .map(Either::<ContractViolation, Tuple2<Section, Constraint>>right) .orElseGet(() -> Either.left(missingSectionViolation(sectionConstraint))); }