scala.util.Left Java Examples

@Override
public Iterable<Either<E, A>> apply(final A element) {
    final long currentTime = System.currentTimeMillis();
    if (currentTime - previousWindow >= windowSizeMillis) {
        previousWindow = currentTime;
        counter = 1;
    } else {
        counter++;
    }
    final Either<E, A> result;
    if (counter <= maxElements) {
        result = Right.apply(element);
    } else {
        result = Left.apply(errorReporter.apply(element));
    }
    return Collections.singletonList(result);
}
 

public <T> T evaluateSimpleExpression(String expression, VariableContext variableContext) {

    CustomContext context = new CustomContext() {
      public VariableProvider variableProvider() {
        return new ContextVariableWrapper(variableContext);
      }
    };

    Either either = feelEngine.evalExpression(expression, context);

    if (either instanceof Right) {
      Right right = (Right) either;

      return (T) right.value();

    } else {
      Left left = (Left) either;
      Failure failure = (Failure) left.value();
      String message = failure.message();

      throw LOGGER.evaluationException(message);

    }
  }
 

private static Either<RuntimeException, AuthorizationContext> getAuthorizationContextAsEither(
        final ExternalMessage externalMessage) {

    return externalMessage.getAuthorizationContext()
            .filter(authorizationContext -> !authorizationContext.isEmpty())
            .<Either<RuntimeException, AuthorizationContext>>map(authorizationContext -> {
                try {
                    return new Right<>(PlaceholderFilter.applyHeadersPlaceholderToAuthContext(authorizationContext,
                            externalMessage.getHeaders()));
                } catch (final RuntimeException e) {
                    return new Left<>(e);
                }
            })
            .orElseGet(() ->
                    new Left<>(new IllegalArgumentException("No nonempty authorization context is available")));

}
 

public static void saveRaster(Dataset dataset, String filename, Bounds bounds, double nodata, String format)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      bounds,
      nodata,
      format,
      new String[]{}
  );
}
 

public static void saveRasterTile(Dataset dataset, String filename, long tx, long ty, int zoom, double nodata)
{
  GDALUtils.saveRasterTile(
      dataset,
      new Left<>(filename),
      tx, ty, zoom,
      nodata,
      "GTiff",
      new String[]{}
  );
}
 

public static void saveRasterTile(Dataset dataset, String filename, long tx, long ty, int zoom, double nodata,
    String format)
{
  GDALUtils.saveRasterTile(
      dataset,
      new Left<>(filename),
      tx, ty, zoom,
      nodata,
      format,
      new String[]{}
  );
}
 

public static void saveRasterTile(Dataset dataset, String filename, long tx, long ty, int zoom, String[] options)
{
  GDALUtils.saveRasterTile(
      dataset,
      new Left<>(filename),
      tx, ty, zoom,
      Double.NEGATIVE_INFINITY,
      "GTiff",
      options
  );
}
 

public static void saveRasterTile(Dataset dataset, String filename, long tx, long ty, int zoom, String format,
    String[] options)
{
  GDALUtils.saveRasterTile(
      dataset,
      new Left<>(filename),
      tx, ty, zoom,
      Double.NEGATIVE_INFINITY,
      format,
      options
  );
}
 

public static void saveRasterTile(Dataset dataset, String filename, long tx, long ty, int zoom, double nodata,
    String[] options)
{
  GDALUtils.saveRasterTile(
      dataset,
      new Left<>(filename),
      tx, ty, zoom,
      nodata,
      "GTiff",
      options
  );
}
 

public static void saveRasterTile(Dataset dataset, String filename, long tx, long ty, int zoom, double nodata,
    String format, String[] options)
{
  GDALUtils.saveRasterTile(
      dataset,
      new Left<>(filename),
      tx, ty, zoom,
      nodata,
      format,
      options
  );
}
 

public static void saveRaster(Dataset dataset, String filename, Bounds bounds)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      bounds,
      Double.NEGATIVE_INFINITY,
      "GTiff",
      new String[]{}
  );
}
 

public static void saveRaster(Dataset dataset, String filename, Bounds bounds, String format)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      bounds,
      Double.NEGATIVE_INFINITY,
      format,
      new String[]{}
  );
}
 

public static void saveRaster(Dataset dataset, String filename, Bounds bounds, double nodata)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      bounds,
      nodata,
      "GTiff",
      new String[]{}
  );
}
 

public static void saveRasterTile(Dataset dataset, String filename, long tx, long ty, int zoom)
{
  GDALUtils.saveRasterTile(
      dataset,
      new Left<>(filename),
      tx, ty, zoom,
      Double.NEGATIVE_INFINITY,
      "GTiff",
      new String[]{}
  );
}
 

public static void saveRaster(Dataset dataset, String filename, Bounds bounds, String[] options)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      bounds,
      Double.NEGATIVE_INFINITY,
      "GTiff",
      options
  );
}
 

public static void saveRaster(Dataset dataset, String filename, Bounds bounds, String format, String[] options)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      bounds,
      Double.NEGATIVE_INFINITY,
      format,
      options
  );
}
 

public static void saveRaster(Dataset dataset, String filename, Bounds bounds, double nodata, String[] options)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      bounds,
      nodata,
      "GTiff",
      options
  );
}
 

public static void saveRaster(Dataset dataset, String filename, Bounds bounds, double nodata, String format,
    String[] options)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      bounds,
      nodata,
      format,
      options
  );
}
 

@Override
public Tuple2<K, ? extends Either<Exception, V>> next() {
    if (caught != null) {
        consumed = true;
        return new Tuple2<>(null, new Left<Exception, V>(caught));
    }
    try {
        Tuple2<K, V> result = delegate.next();
        return new Tuple2<>(result._1(), new Right<Exception, V>(result._2()));
    } catch (Exception e) {
        consumed = true;
        return new Tuple2<>(null, new Left<Exception, V>(e));
    }
}
 

public boolean evaluateSimpleUnaryTests(String expression,
                                        String inputVariable,
                                        VariableContext variableContext) {
  Map inputVariableMap = new Map.Map1(UnaryTests$.MODULE$.inputVariable(), inputVariable);

  StaticVariableProvider inputVariableContext = new StaticVariableProvider(inputVariableMap);

  ContextVariableWrapper contextVariableWrapper = new ContextVariableWrapper(variableContext);

  CustomContext context = new CustomContext() {
    public VariableProvider variableProvider() {
      return new CompositeVariableProvider(toScalaList(inputVariableContext, contextVariableWrapper));
    }
  };

  Either either = feelEngine.evalUnaryTests(expression, context);

  if (either instanceof Right) {
    Right right = (Right) either;
    Object value = right.value();

    return BoxesRunTime.unboxToBoolean(value);

  } else {
    Left left = (Left) either;
    Failure failure = (Failure) left.value();
    String message = failure.message();

    throw LOGGER.evaluationException(message);

  }
}
 

public static void saveRaster(Dataset dataset, String filename, String format)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      null,
      Double.NEGATIVE_INFINITY,
      format,
      new String[]{}
  );
}
 

private static Either<CreditDecision, Integer> countMembersOfExpectedRoles(final ClusterStatus clusterStatus) {
    final List<Integer> reachableMembersOfExpectedRoles = clusterStatus.getRoles()
            .stream()
            .filter(role -> EXPECTED_ROLES.contains(role.getRole()))
            .map(role -> role.getReachable().size())
            .collect(Collectors.toList());

    if (reachableMembersOfExpectedRoles.size() == EXPECTED_ROLES.size()) {
        return new Right<>(reachableMembersOfExpectedRoles.stream().mapToInt(Integer::intValue).sum());
    } else {
        // some expected roles are not reachable; do not return members count.
        return new Left<>(
                CreditDecision.no("Not all expected roles " + EXPECTED_ROLES + " are present: " + clusterStatus));
    }
}
 

@Override
public Iterable<Either<FailureWithLookBehind<E>, E>> apply(final Envelope<E> param) {
    if (param instanceof Element) {
        final E element = ((Element<E>) param).element;
        enqueue(element);
        return Collections.singletonList(new Right<>(element));
    } else if (param instanceof Error) {
        final List<E> finalElementsCopy = new ArrayList<>(finalElements);
        final Throwable error = ((Error<E>) param).error;
        return Collections.singletonList(new Left<>(new FailureWithLookBehind<>(finalElementsCopy, error)));
    } else {
        // param is EOS; this is not supposed to happen.
        throw new IllegalStateException("End-of-stream encountered; stream should be complete already!");
    }
}
 

private Graph<FanOutShape2<String, Either<StreamControlMessage, Signal>, DittoRuntimeException>, NotUsed>
selectStreamControlOrSignal(
        final JsonSchemaVersion version,
        final CharSequence connectionCorrelationId,
        final AuthorizationContext connectionAuthContext,
        final DittoHeaders additionalHeaders,
        final ProtocolAdapter adapter) {

    final ProtocolMessageExtractor protocolMessageExtractor =
            new ProtocolMessageExtractor(connectionAuthContext, connectionCorrelationId);

    return Filter.multiplexByEither(cmdString -> {
        final Optional<StreamControlMessage> streamControlMessage = protocolMessageExtractor.apply(cmdString);
        if (streamControlMessage.isPresent()) {
            return Right.apply(Left.apply(streamControlMessage.get()));
        } else {
            try {
                final Signal<?> signal = buildSignal(cmdString, version, connectionCorrelationId,
                        connectionAuthContext, additionalHeaders, adapter, headerTranslator);
                return Right.apply(Right.apply(signal));
            } catch (final DittoRuntimeException dre) {
                // This is a client error usually; log at level DEBUG without stack trace.
                LOGGER.withCorrelationId(dre)
                        .debug("DittoRuntimeException building signal from <{}>: <{}>", cmdString, dre);
                return Left.apply(dre);
            } catch (final Exception throwable) {
                LOGGER.warn("Error building signal from <{}>: {}: <{}>", cmdString,
                        throwable.getClass().getSimpleName(), throwable.getMessage());
                final DittoRuntimeException dittoRuntimeException = GatewayInternalErrorException.newBuilder()
                        .cause(throwable)
                        .build();
                return Left.apply(dittoRuntimeException);
            }
        }
    });
}
 

@Override
public Either<ExecutionFailed, CypherValueRecords> cypher(String query, Map<String, CypherValue> params, QueryType meta) {
    if (query.contains("foo()")) {
        return new Left<>(new ExecutionFailed("SyntaxError", "compile time", "UnknownFunction", null));
    } else if (query.startsWith("RETURN ")) {
        String result = query.replace("RETURN ", "");
        System.out.println("Producing some output " + result);
        List<String> header = new Set.Set1<>(result).toList();
        Map<String, String> row = new Map.Map1<>(result, result);
        List<Map<String, String>> rows = new Set.Set1<>(row).toList();
        return new Right<>(new StringRecords(header, rows).asValueRecords());
    } else {
        return new Right<>(CypherValueRecords.empty());
    }
}
 

public static void saveRaster(Dataset dataset, String filename)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      null,
      Double.NEGATIVE_INFINITY,
      "GTiff",
      new String[]{}
  );
}
 

public static void saveRasterTile(Dataset dataset, String filename, long tx, long ty, int zoom, String format)
{
  GDALUtils.saveRasterTile(
      dataset,
      new Left<>(filename),
      tx, ty, zoom,
      Double.NEGATIVE_INFINITY,
      format,
      new String[]{}
  );
}
 

public static void saveRaster(Dataset dataset, String filename, double nodata)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      null,
      nodata,
      "GTiff",
      new String[]{}
  );
}
 

public static void saveRaster(Dataset dataset, String filename, double nodata, String format)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      null,
      nodata,
      format,
      new String[]{}
  );
}
 

public static void saveRaster(Dataset dataset, String filename, String[] options)
{
  GDALUtils.saveRaster(
      dataset,
      new Left<>(filename),
      null,
      Double.NEGATIVE_INFINITY,
      "GTiff",
      options
  );
}