Example usage for java.util Optional isPresent

Introduction

In this page you can find the example usage for java.util Optional isPresent.

Prototype

public boolean isPresent() 

Source Link

Document

If a value is present, returns true , otherwise false .

Usage

From source file:io.github.lxgaming.teleportbow.managers.CommandManager.java

public static boolean registerCommand(AbstractCommand parentCommand,
        Class<? extends AbstractCommand> commandClass) {
    if (parentCommand.getClass() == commandClass) {
        TeleportBow.getInstance().getLogger().warn("{} attempted to register itself",
                parentCommand.getClass().getSimpleName());
        return false;
    }/* www .  jav  a  2s. c  o m*/

    if (getCommandClasses().contains(commandClass)) {
        TeleportBow.getInstance().getLogger().warn("{} has already been registered",
                commandClass.getSimpleName());
        return false;
    }

    getCommandClasses().add(commandClass);
    Optional<AbstractCommand> command = Toolbox.newInstance(commandClass);
    if (!command.isPresent()) {
        TeleportBow.getInstance().getLogger().error("{} failed to initialize", commandClass.getSimpleName());
        return false;
    }

    parentCommand.getChildren().add(command.get());
    TeleportBow.getInstance().getLogger().debug("{} registered for {}", commandClass.getSimpleName(),
            parentCommand.getClass().getSimpleName());
    return true;
}

---

From source file:io.pravega.controller.store.stream.tables.IndexRecord.java

private static Pair<Integer, Optional<IndexRecord>> binarySearchIndex(final int lower, final int upper,
        final long timestamp, final byte[] indexTable) {
    if (upper < lower || indexTable.length == 0) {
        return new ImmutablePair<>(0, Optional.empty());
    }//www . j av  a  2 s.c  om

    final int offset = ((lower + upper) / 2) * IndexRecord.INDEX_RECORD_SIZE;

    final IndexRecord record = IndexRecord.readRecord(indexTable, offset).get();

    final Optional<IndexRecord> next = IndexRecord.fetchNext(indexTable, offset);

    if (record.getEventTime() <= timestamp) {
        if (!next.isPresent() || (next.get().getEventTime() > timestamp)) {
            return new ImmutablePair<>(offset, Optional.of(record));
        } else {
            return binarySearchIndex((lower + upper) / 2 + 1, upper, timestamp, indexTable);
        }
    } else {
        return binarySearchIndex(lower, (lower + upper) / 2 - 1, timestamp, indexTable);
    }
}

---

From source file:com.ikanow.aleph2.data_model.utils.PropertiesUtils.java

/**
 * Reads in the config file and sends back a list of a config data service entries based on the
 * given configPrefix.  This is used by the ModuleUtils to get the requested modules to load.
 * /*from w w w  . j  av  a 2  s.c  o m*/
 * @param config
 * @param configPrefix
 * @return
 * @throws IOException 
 * @throws JsonMappingException 
 * @throws JsonParseException 
 */
public static List<ConfigDataServiceEntry> getDataServiceProperties(final Config config,
        final String configPrefix) {
    Optional<ConfigObject> sub_config = getSubConfigObject(config, configPrefix);
    if (sub_config.isPresent()) {
        final ConfigObject dataServiceConfig = sub_config.get(); //config.getObject(configPrefix);         
        List<ConfigDataServiceEntry> toReturn = dataServiceConfig.entrySet().stream()
                .map(entry -> new ConfigDataServiceEntry(entry.getKey(),
                        Optional.ofNullable(PropertiesUtils.getConfigValue(config,
                                configPrefix + "." + entry.getKey() + ".interface", null)),
                        PropertiesUtils.getConfigValue(config, configPrefix + "." + entry.getKey() + ".service",
                                null),
                        PropertiesUtils.getConfigValue(config, configPrefix + "." + entry.getKey() + ".default",
                                false)))
                .collect(Collectors.toList());
        return toReturn;
    } else {
        return Collections.emptyList();
    }
}

---

From source file:io.github.retz.web.AppRequestHandler.java

static String getApp(Request req, Response res) throws JsonProcessingException {
    LOG.debug(LoadAppRequest.resourcePattern());
    Optional<AuthHeader> authHeaderValue = getAuthInfo(req);

    String appname = req.params(":name");
    LOG.debug("deleting app {} requested by {}", appname, authHeaderValue.get().key());
    Optional<Application> maybeApp = Applications.get(appname);
    res.type("application/json");
    if (maybeApp.isPresent()) {
        // Compare application owner and requester
        validateOwner(req, maybeApp.get());

        res.status(200);//from  w  w w  . ja  v a2  s  .c o  m
        GetAppResponse getAppResponse = new GetAppResponse(maybeApp.get());
        getAppResponse.ok();
        String r = MAPPER.writeValueAsString(getAppResponse);
        LOG.info(r);
        return r;

    } else {
        ErrorResponse response = new ErrorResponse("No such application: " + appname);
        res.status(404);
        return MAPPER.writeValueAsString(response);
    }
}

---

From source file:com.netflix.spinnaker.halyard.config.model.v1.security.AuthnMethod.java

public static Class<? extends AuthnMethod> translateAuthnMethodName(String authnMethodName) {
    Optional<? extends Class<?>> res = Arrays.stream(Authn.class.getDeclaredFields())
            .filter(f -> f.getName().equals(authnMethodName)).map(Field::getType).findFirst();

    if (res.isPresent()) {
        return (Class<? extends AuthnMethod>) res.get();
    } else {/*  w w w  . j  av a  2s. c  o m*/
        throw new IllegalArgumentException(
                "No authn method with name \"" + authnMethodName + "\" handled by halyard");
    }
}

---

From source file:io.github.lxgaming.teleportbow.util.Toolbox.java

public static boolean isValidBow(ItemStack itemStack) {
    if (itemStack == null || itemStack.getType() != ItemTypes.BOW) {
        return false;
    }/*from www. ja  va2  s.  c  o m*/

    Optional<List<Enchantment>> enchantments = itemStack.get(Keys.ITEM_ENCHANTMENTS);
    if (!enchantments.isPresent() || enchantments.get().isEmpty()) {
        return false;
    }

    for (Enchantment enchantment : enchantments.get()) {
        if (enchantment.getType() == EnchantmentTypes.INFINITY && enchantment.getLevel() == 10) {
            return true;
        }
    }

    return false;
}

---

From source file:io.github.lxgaming.teleportbow.managers.CommandManager.java

public static CommandResult process(AbstractCommand abstractCommand, CommandSource commandSource,
        String message) {//from   w w w .ja v a 2s .c om
    Optional<List<String>> arguments = getArguments(message).map(Toolbox::newArrayList);
    if (!arguments.isPresent()) {
        commandSource
                .sendMessage(Text.of(Toolbox.getTextPrefix(), TextColors.RED, "Failed to collect arguments"));
        return CommandResult.empty();
    }

    Optional<AbstractCommand> command = getCommand(abstractCommand, arguments.get());
    if (!command.isPresent()) {
        return CommandResult.empty();
    }

    if (!command.get().testPermission(commandSource)) {
        commandSource.sendMessage(Text.of(Toolbox.getTextPrefix(), TextColors.RED,
                "You do not have permission to execute this command"));
        return CommandResult.empty();
    }

    TeleportBow.getInstance().getLogger().debug("Processing {} for {}",
            command.get().getPrimaryAlias().orElse("Unknown"), commandSource.getName());
    return command.get().execute(commandSource, arguments.get());
}

---

From source file:io.syndesis.rest.v1.handler.connection.ConnectionActionHandler.java

static boolean shouldEnrichDataShape(final Optional<DataShape> maybeExistingDataShape,
        final Object received) {
    if (maybeExistingDataShape.isPresent() && received != null) {
        final DataShape existingDataShape = maybeExistingDataShape.get();

        return "json-schema".equals(existingDataShape.getKind())
                && existingDataShape.getSpecification() == null;
    }//from w ww  .  j a va 2s . c om

    return false;
}

---

From source file:com.facebook.buck.testutil.integration.TarInspector.java

private static TarArchiveInputStream getArchiveInputStream(Optional<String> compressorType, Path tar)
        throws IOException, CompressorException {
    BufferedInputStream inputStream = new BufferedInputStream(Files.newInputStream(tar));
    if (compressorType.isPresent()) {
        return new TarArchiveInputStream(
                new CompressorStreamFactory().createCompressorInputStream(compressorType.get(), inputStream));
    }/*  www .  j a va 2  s .  com*/
    return new TarArchiveInputStream(inputStream);
}

---

From source file:io.github.retz.web.AppRequestHandler.java

static String loadApp(Request req, Response res) throws JsonProcessingException, IOException {
    LOG.debug(LoadAppRequest.resourcePattern());
    Optional<AuthHeader> authHeaderValue = getAuthInfo(req);
    res.type("application/json");

    // TODO: check key from Authorization header matches a key in Application object
    LoadAppRequest loadAppRequest = MAPPER.readValue(req.bodyAsBytes(), LoadAppRequest.class);
    LOG.debug("app (id={}, owner={}), requested by {}", loadAppRequest.application().getAppid(),
            loadAppRequest.application().getOwner(), authHeaderValue.get().key());

    // Compare application owner and requester
    validateOwner(req, loadAppRequest.application());

    Optional<Application> tmp = Applications.get(loadAppRequest.application().getAppid());
    if (tmp.isPresent()) {
        if (!tmp.get().getOwner().equals(loadAppRequest.application().getOwner())) {
            res.status(403);//  w  w  w . ja va  2  s.  c om
            LOG.error("Application {} is already owned by ", loadAppRequest.application().getAppid(),
                    tmp.get().getOwner());
            return MAPPER.writeValueAsString(
                    new ErrorResponse("The application name is already used by other user"));
        }
    }

    if (!(loadAppRequest.application().container() instanceof DockerContainer)) {
        if (loadAppRequest.application().getUser().isPresent()
                && loadAppRequest.application().getUser().get().equals("root")) {
            res.status(400);
            return MAPPER
                    .writeValueAsString(new ErrorResponse("root user is only allowed with Docker container"));
        }
    }

    Application app = loadAppRequest.application();
    LOG.info("Registering application name={} owner={}", app.getAppid(), app.getOwner());
    boolean result = Applications.load(app);

    if (result) {
        res.status(200);
        LoadAppResponse response = new LoadAppResponse();
        response.ok();
        return MAPPER.writeValueAsString(response);
    } else {

        res.status(400);
        return MAPPER.writeValueAsString(new ErrorResponse("cannot load application"));
    }

}

---

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