Example usage for com.google.common.base Optional absent

Introduction

In this page you can find the example usage for com.google.common.base Optional absent.

Prototype

public static <T> Optional<T> absent()

Source Link

Document

Returns an Optional instance with no contained reference.

Usage

From source file:testpackage.OptionalWrapper.java

public static Optional<String> none() {
    return Optional.absent();
}

From source file:springfox.documentation.schema.ClassSupport.java

public static Optional<? extends Class> classByName(String className) {
    try {//  w w w. j a v  a2s .  c  o m
        return Optional.of(Class.forName(className));
    } catch (ClassNotFoundException e) {
        return Optional.absent();
    }
}

From source file:extrabiomes.module.summa.biome.WeightedRandomChooser.java

static <T extends WeightedRandomItem> Optional<T> getRandomItem(Random rand, Collection<T> collection,
        int limit) {
    if (limit > 0) {
        int choice = rand.nextInt(limit);

        for (final T item : collection) {
            choice -= item.itemWeight;/*w w  w . j  a  va2s .c o m*/
            if (choice < 0)
                return Optional.of(item);
        }
    }

    return Optional.absent();
}

From source file:extrabiomes.api.Biomes.java

/**
 * Retrieves a custom biome//from ww  w. j a  va  2s . com
 * 
 * @param targetBiome
 *            The string name of the targertBiome. See
 *            {@link GetBiomeIDEvent#targetBiome} for valid values.
 * @return The requested biome. If the biome does not exist, the
 *         <code>Optional</code> value will not be present.
 */
public static Optional<BiomeGenBase> getBiome(String targetBiome) {
    final GetBiomeIDEvent event = new GetBiomeIDEvent(targetBiome);
    Api.getExtrabiomesXLEventBus().post(event);
    if (event.biomeID <= 0)
        return Optional.absent();
    return Optional.of(BiomeGenBase.biomeList[event.biomeID]);
}

From source file:org.eclipse.epp.internal.logging.aeri.ui.utils.Shells.java

public static Optional<Shell> getWorkbenchWindowShell() {
    IWorkbenchWindow workbenchWindow = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
    if (workbenchWindow != null) {
        Shell shell = workbenchWindow.getShell();
        if (shell != null) {
            return Optional.of(shell);
        }// w ww .  j  a va  2 s . c  om
    }
    return Optional.absent();
}

From source file:ch.epfl.eagle.daemon.util.Serialization.java

public static Optional<InetSocketAddress> strToSocket(String in) {
    String[] parts = in.split(":");
    if (parts.length != 2) {
        return Optional.absent();
    }//  ww w  .  j a v  a2 s. c  o  m
    String host = parts[0];
    // This deals with the wonky way Java InetAddress toString() represents an address:
    // "hostname/IP"
    if (parts[0].contains("/")) {
        host = parts[0].split("/")[1];
    }
    try {
        return Optional.of(new InetSocketAddress(host, Integer.parseInt(parts[1])));
    } catch (NumberFormatException e) {
        return Optional.absent();
    }
}

From source file:rickbw.incubator.choice.Choices.java

public static <F, T> Optional<T> map(final Optional<F> from, final Function<? super F, ? extends T> func) {
    if (from.isPresent()) {
        final T result = func.apply(from.get());
        return Optional.of(result);
    } else {/*  w  w w  . j  ava  2s.  c  o m*/
        return Optional.absent();
    }
}

From source file:extrabiomes.handlers.ConfigurationHandler.java

public static void init(File configFile) {
    Optional<EnhancedConfiguration> optionalConfig = Optional.absent();

    try {/*from w  w  w. ja v  a  2 s .  co m*/
        optionalConfig = Optional.of(new EnhancedConfiguration(configFile));
        final EnhancedConfiguration configuration = optionalConfig.get();

        for (final BiomeSettings setting : BiomeSettings.values()) {
            setting.load(configuration);
        }

        for (final DecorationSettings setting : DecorationSettings.values()) {
            setting.load(configuration);
        }

        for (final BlockSettings setting : BlockSettings.values()) {
            setting.load(configuration);
        }

        for (final ItemSettings setting : ItemSettings.values()) {
            setting.load(configuration);
        }

        configuration.addCustomCategoryComment("saplingreplanting",
                "Settings to configure the chance that saplings will replant themselves up despawning on valid soil.");
        for (final SaplingSettings setting : SaplingSettings.values()) {
            setting.load(configuration);
        }

        for (final ModuleControlSettings setting : ModuleControlSettings.values()) {
            setting.load(configuration);
        }

        Property bigTreeSaplingDropRateProperty = configuration.get(Configuration.CATEGORY_GENERAL,
                "Relative sapling drops", false);
        bigTreeSaplingDropRateProperty.comment = "Setting relative sapling drops to true will decrease the amount of saplings dropped by decaying fir and redwood leaf blocks to a more reasonable amount.";
        GeneralSettings.bigTreeSaplingDropModifier = bigTreeSaplingDropRateProperty.getBoolean(false);

        //
        Property consoleCommandsDisabled = configuration.get(Configuration.CATEGORY_GENERAL,
                "DisableConsoleCommands", true);
        consoleCommandsDisabled.comment = "Set to false to enable console commands.";
        GeneralSettings.consoleCommandsDisabled = consoleCommandsDisabled.getBoolean(true);

    } catch (final Exception e) {
        LogHelper.log(Level.SEVERE, e, "%s had had a problem loading its configuration", Reference.MOD_NAME);
    } finally {
        if (optionalConfig.isPresent())
            optionalConfig.get().save();
    }
}

From source file:org.puder.trs80.ActivityHelper.java

/**
 * Returns an extra value with the given key, if the intent, the extras and the key itself are
 * present.//from w ww  .  j a  v  a 2 s .  c  o  m
 */
static Optional<Integer> getIntExtra(Intent intent, String key) {
    if (intent == null) {
        Log.i(TAG, "No intent.");
        return Optional.absent();
    }
    if (!intent.hasExtra(key)) {
        Log.i(TAG, StrUtil.form("No extra named '%s'.", key));
        return Optional.absent();
    }
    return Optional.of(intent.getIntExtra(key, 0));
}

From source file:org.gluu.oxtrust.model.helper.SCIMHelper.java

/**
 * try to extract an email from the User. 
 * If the User has a primary email address this email will be returned.
 * If not the first email address found will be returned.
 * If no Email has been found email.isPresent() == false 
 * @param user a {@link User} with a possible email
 * @return an email if found//from   w ww.j a v a2s  . co  m
 */
public static Optional<Email> getPrimaryOrFirstEmail(User user) {
    for (Email email : user.getEmails()) {
        if (email.isPrimary()) {
            return Optional.of(email);
        }
    }

    if (user.getEmails().size() > 0) {
        return Optional.of(user.getEmails().get(0));
    }
    return Optional.absent();
}