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

Introduction

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

Prototype

public abstract boolean isPresent();

Source Link

Document

Returns true if this holder contains a (non-null) instance.

Usage

From source file:gobblin.http.HttpClientConfiguratorLoader.java

private static Class<? extends HttpClientConfigurator> getConfiguratorClass(Optional<String> configuratorType)
        throws ClassNotFoundException {
    return configuratorType.isPresent() ? TYPE_RESOLVER.resolveClass(configuratorType.get())
            : DEFAULT_CONFIGURATOR_CLASS;
}

From source file:net.pterodactylus.sonitus.io.Mp3Identifier.java

/**
 * Tries to identify the MP3 file contained in the given stream.
 *
 * @param inputStream//from w  ww .ja va  2  s .c om
 *       The input stream
 * @return The identified metadata, or {@link Optional#absent()} if the
 *         metadata can not be identified
 * @throws IOException
 *       if an I/O error occurs
 */
public static Optional<Metadata> identify(InputStream inputStream) throws IOException {
    Parser mp3Parser = new Parser(inputStream);
    Frame frame = mp3Parser.nextFrame();
    FormatMetadata formatMetadata = new FormatMetadata((frame.channelMode() == SINGLE_CHANNEL) ? 1 : 2,
            frame.samplingRate(), "MP3");
    ContentMetadata contentMetadata = new ContentMetadata("");
    /* check for ID3v2 tag. */
    Optional<byte[]> id3v2TagBuffer = mp3Parser.getId3Tag();
    if (id3v2TagBuffer.isPresent()) {
        byte[] buffer = id3v2TagBuffer.get();
        ByteArrayInputStream tagInputStream = new ByteArrayInputStream(
                Arrays.copyOfRange(buffer, 3, buffer.length));
        try {
            /* skip ID3? header tag. */
            ID3V2Tag id3v2Tag = ID3V2Tag.read(tagInputStream);
            if (id3v2Tag != null) {
                contentMetadata = contentMetadata.artist(id3v2Tag.getArtist()).name(id3v2Tag.getTitle());
            }
        } catch (ID3Exception id3e1) {
            id3e1.printStackTrace();
        } finally {
            close(tagInputStream, true);
        }
    }
    return Optional.of(new Metadata(formatMetadata, contentMetadata));
}

From source file:com.google.caliper.runner.PlatformModule.java

/**
 * Chooses the {@link DalvikPlatform} if available, otherwise uses the default
 * {@link JvmPlatform}./* www. j av  a  2  s . c o  m*/
 */
@Provides
static Platform providePlatform(Optional<DalvikPlatform> optionalDalvikPlatform,
        Provider<JvmPlatform> jvmPlatformProvider) {
    if (optionalDalvikPlatform.isPresent()) {
        return optionalDalvikPlatform.get();
    } else {
        return jvmPlatformProvider.get();
    }
}

From source file:org.opendaylight.groupbasedpolicy.neutron.ovsdb.util.NeutronHelper.java

/**
 * This looks up the Endpoint L2 key from an
 * operational data store kept in neutron-mapper
 *
 * @param externalId The neutron port UUID
 * @param dataBroker {@link DataBroker} to use for the transaction
 * @return {@link EndpointKey} of the matching Endpoint, null if not found
 *//*from   w w w . ja v a  2  s .c om*/
public static EndpointKey getEpKeyFromNeutronMapper(UniqueId externalId, DataBroker dataBroker) {

    ReadWriteTransaction transaction = dataBroker.newReadWriteTransaction();
    InstanceIdentifier<EndpointByPort> iid = InstanceIdentifier.create(Mappings.class)
            .child(GbpByNeutronMappings.class).child(EndpointsByPorts.class)
            .child(EndpointByPort.class, new EndpointByPortKey(externalId));
    Optional<EndpointByPort> optionalEp = readFromDs(LogicalDatastoreType.OPERATIONAL, iid, transaction);
    if (optionalEp.isPresent()) {
        EndpointByPort epByPort = optionalEp.get();
        return new EndpointKey(epByPort.getL2Context(), epByPort.getMacAddress());
    }
    return null;
}

From source file:org.sonar.server.computation.formula.coverage.CoverageUtils.java

static MeasureVariations getMeasureVariations(CounterInitializationContext counterContext, String metricKey) {
    Optional<Measure> measure = counterContext.getMeasure(metricKey);
    if (!measure.isPresent() || !measure.get().hasVariations()) {
        return DEFAULT_VARIATIONS;
    }//ww w  .  j  a  va2s  . c om
    return measure.get().getVariations();
}

From source file:org.obm.push.mail.bean.Flag.java

public static Flag from(String value) {
    Optional<Flag> systemFlag = isSystemFlag(value);
    if (systemFlag.isPresent()) {
        return systemFlag.get();
    }// w w w  .  j  a va  2  s .  co m
    return new Flag(value, false);
}

From source file:org.locationtech.geogig.repository.SpatialOps.java

@Nullable
public static Envelope boundsOf(RevFeature feat) {
    Envelope env = null;//from  w  w w  . jav  a 2 s .c  om
    for (Optional<Object> opt : feat.getValues()) {
        if (opt.isPresent() && opt.get() instanceof Geometry) {
            if (env == null) {
                env = new Envelope();
            }
            env.expandToInclude(((Geometry) opt.get()).getEnvelopeInternal());
        }
    }
    return env;
}

From source file:org.locationtech.geogig.remotes.internal.RemoteResolver.java

/**
 * Constructs an interface to allow access to a remote repository.
 * //from   w  w w  .  j  av a2s.com
 * @param remote the remote to connect to
 * @param remoteHints hints for the remote repo, like read-only, etc.
 * @return an {@link Optional} of the interface to the remote repository, or
 *         {@link Optional#absent()} if a connection to the remote could not be established.
 */
public static Optional<IRemoteRepo> newRemote(Remote remote, @Nullable Hints remoteHints) {

    if (remoteHints == null) {
        remoteHints = new Hints();
    }

    Iterator<RemoteResolver> resolvers = ServiceLoader
            .load(RemoteResolver.class, RemoteResolver.class.getClassLoader()).iterator();

    while (resolvers.hasNext()) {
        RemoteResolver resolver = resolvers.next();
        Optional<IRemoteRepo> resolved = resolver.resolve(remote, remoteHints);
        if (resolved.isPresent()) {
            return resolved;
        }
    }
    return Optional.absent();
}

From source file:org.locationtech.geogig.storage.impl.Blobs.java

public static Optional<String> getBlobAsString(BlobStore blobStore, String blobName) {
    Optional<byte[]> blob = getBlob(blobStore, blobName);
    Optional<String> str = Optional.absent();
    if (blob.isPresent()) {
        str = Optional.of(new String(blob.get(), Charsets.UTF_8));
    }/*from ww  w .  j av a2  s  .  c  om*/
    return str;
}

From source file:com.palantir.giraffe.internal.ProcessStreamHandler.java

private static SharedByteArrayStream newStreamWithWindow(Optional<Integer> window) {
    if (window.isPresent()) {
        return new SharedByteArrayStream(window.get());
    } else {/*from  w w w . jav  a 2  s.  c o  m*/
        return new SharedByteArrayStream();
    }
}