How to use

isLeft

method

in

org.kie.dmn.feel.util.Either

public boolean isRight() {
  return ! isLeft();
}

  public <X> X cata(Function<L,X> left, Function<R,X> right) {
    // warning: left.invoke, because of FEEL specs, could return null. The below is the safest way to implement cata over this Either.
    return isLeft() ? left.apply( this.left.get() ) : right.apply( this.right.orElse( null ) );
  }
}

@Test
public void testLocateInNSnoModelNameWithAlias2() {
  final Import i = makeImport("nsA", "boh", null);
  final List<QName> available = Arrays.asList(new QName("nsA", "m1"),
                        new QName("nsA", "m2"),
                        new QName("nsB", "m3"));
  final Either<String, QName> result = ImportDMNResolverUtil.resolveImportDMN(i, available, Function.identity());
  assertTrue(result.isLeft());
}

@Test
public void testLocateInNSnoModelNameWithAlias() {
  final Import i = makeImport("nsA", "m1", null);
  final List<QName> available = Arrays.asList(new QName("nsA", "m1"),
                        new QName("nsA", "m2"),
                        new QName("nsB", "m3"));
  final Either<String, QName> result = ImportDMNResolverUtil.resolveImportDMN(i, available, Function.identity());
  assertTrue(result.isLeft());
}

@Test
public void testNSandUnexistentModelName() {
  final Import i = makeImport("ns1", null, "boh");
  final List<QName> available = Arrays.asList(new QName("ns1", "m1"),
                        new QName("ns2", "m2"),
                        new QName("ns3", "m3"));
  final Either<String, QName> result = ImportDMNResolverUtil.resolveImportDMN(i, available, Function.identity());
  assertTrue(result.isLeft());
}

@Test
public void testLocateInNSunexistent() {
  final Import i = makeImport("nsA", null, "boh");
  final List<QName> available = Arrays.asList(new QName("nsA", "m1"),
                        new QName("nsA", "m2"),
                        new QName("nsB", "m3"));
  final Either<String, QName> result = ImportDMNResolverUtil.resolveImportDMN(i, available, Function.identity());
  assertTrue(result.isLeft());
}

@Test
public void testLocateInNSAliasedBadScenario() {
  // this is a BAD scenario are in namespace `nsA` there are 2 models with the same name.
  final Import i = makeImport("nsA", "aliased", "mA");
  final List<QName> available = Arrays.asList(new QName("nsA", "mA"),
                        new QName("nsA", "mA"),
                        new QName("nsB", "m3"));
  final Either<String, QName> result = ImportDMNResolverUtil.resolveImportDMN(i, available, Function.identity());
  assertTrue(result.isLeft());
}

if ( actualInputMatch.isLeft() ) {
  return actualInputMatch.cata( e -> FEELFnResult.ofError(e), e -> FEELFnResult.ofError(null) );