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

Introduction

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

Prototype

public static <T> Optional<T> of(T reference)

Source Link

Document

Returns an Optional instance containing the given non-null reference.

Usage

From source file:com.empcraft.xpbank.util.ChunkUtil.java

public static Optional<Chunk> getLoadedChunk(World world, Location loc) {
    Preconditions.checkNotNull(loc);/*w w  w  . j av a2  s . c  om*/
    Optional<Chunk> loadedChunk = Optional.absent();

    final Chunk chunkAt = world.getChunkAt(loc);
    if (chunkAt.isLoaded()) {
        loadedChunk = Optional.of(chunkAt);
    }

    return loadedChunk;
}

From source file:org.apache.beam.sdk.extensions.sql.impl.utils.SqlTypeUtils.java

/**
 * Finds an operand with provided type. Returns Optional.absent() if no operand found with
 * matching type/* www  .  ja v a 2  s. c om*/
 */
public static Optional<BeamSqlExpression> findExpressionOfType(List<BeamSqlExpression> operands,
        SqlTypeName type) {

    for (BeamSqlExpression operand : operands) {
        if (type.equals(operand.getOutputType())) {
            return Optional.of(operand);
        }
    }

    return Optional.absent();
}

From source file:com.kegare.frozenland.util.Version.java

private static void initialize() {
    CURRENT = Optional.of(Strings.nullToEmpty(Frozenland.metadata.version));
    LATEST = Optional.fromNullable(CURRENT.orNull());

    File file = FrozenUtils.getModContainer().getSource();

    if (file != null && file.exists()) {
        if (file.isFile()) {
            String name = FilenameUtils.getBaseName(file.getName());

            if (StringUtils.endsWithIgnoreCase(name, "dev")) {
                DEV_DEBUG = true;/*  w  w  w.j a v  a 2  s. c om*/
            }
        } else if (file.isDirectory()) {
            DEV_DEBUG = true;
        }
    } else if (!FMLForgePlugin.RUNTIME_DEOBF) {
        DEV_DEBUG = true;
    }

    if (Frozenland.metadata.version.endsWith("dev")) {
        DEV_DEBUG = true;
    } else if (DEV_DEBUG) {
        Frozenland.metadata.version += "-dev";
    }
}

From source file:org.dswarm.graph.delta.match.model.util.CSEntityUtil.java

public static Optional<? extends Collection<ValueEntity>> getValueEntities(
        final Optional<? extends Collection<CSEntity>> csEntities) {

    if (!csEntities.isPresent() || csEntities.get().isEmpty()) {

        return Optional.absent();
    }/*  www.j a v  a 2s.  c om*/

    final Set<ValueEntity> valueEntities = new HashSet<>();

    for (final CSEntity csEntity : csEntities.get()) {

        valueEntities.addAll(csEntity.getValueEntities());
    }

    return Optional.of(valueEntities);
}

From source file:com.facebook.presto.block.BlockUtils.java

public static BlockIterable emptyBlockIterable() {
    return new BlockIterable() {
        @Override//from ww  w  .  j  a v a 2s  .  c om
        public TupleInfo getTupleInfo() {
            return TupleInfo.SINGLE_LONG;
        }

        @Override
        public Optional<DataSize> getDataSize() {
            return Optional.of(new DataSize(0, Unit.BYTE));
        }

        @Override
        public Optional<Integer> getPositionCount() {
            return Optional.of(0);
        }

        @Override
        public Iterator<Block> iterator() {
            return Iterators.emptyIterator();
        }
    };
}

From source file:org.geogit.di.PluginDefaults.java

public PluginDefaults(VersionedFormat objects, VersionedFormat staging, VersionedFormat refs,
        VersionedFormat graph) {//from   w  w w .  j  av  a  2  s  .  c  om
    this.refs = Optional.of(refs);
    this.objects = Optional.of(objects);
    this.staging = Optional.of(staging);
    this.graph = Optional.of(graph);
}

From source file:gobblin.metrics.MetricReportUtils.java

/**
 * Parses a {@link gobblin.metrics.MetricReport} from a byte array representing a json input.
 * @param reuse MetricReport to reuse.//from   w  ww  . j  a  v  a 2  s.com
 * @param bytes Input bytes.
 * @return MetricReport.
 * @throws java.io.IOException
 */
public synchronized static MetricReport deserializeReportFromJson(MetricReport reuse, byte[] bytes)
        throws IOException {
    if (!READER.isPresent()) {
        READER = Optional.of(new SpecificDatumReader<MetricReport>(MetricReport.class));
    }

    Closer closer = Closer.create();

    try {
        DataInputStream inputStream = closer.register(new DataInputStream(new ByteArrayInputStream(bytes)));

        // Check version byte
        int versionNumber = inputStream.readInt();
        if (versionNumber != SCHEMA_VERSION) {
            throw new IOException(
                    String.format("MetricReport schema version not recognized. Found version %d, expected %d.",
                            versionNumber, SCHEMA_VERSION));
        }

        // Decode the rest
        Decoder decoder = DecoderFactory.get().jsonDecoder(MetricReport.SCHEMA$, inputStream);
        return READER.get().read(reuse, decoder);
    } catch (Throwable t) {
        throw closer.rethrow(t);
    } finally {
        closer.close();
    }
}

From source file:org.opendaylight.yangtools.yang.data.api.schema.tree.StoreTreeNodes.java

/**
 * Finds a node in tree//from   www .  jav  a 2  s .  c  om
 * @param <T>
 *          Store tree node type.
 * @param tree Data Tree
 * @param path Path to the node
 * @return Optional with node if the node is present in tree, {@link Optional#absent()} otherwise.
 */
public static <T extends StoreTreeNode<T>> Optional<T> findNode(final T tree,
        final YangInstanceIdentifier path) {
    Optional<T> current = Optional.of(tree);
    Iterator<PathArgument> pathIter = path.getPathArguments().iterator();
    while (current.isPresent() && pathIter.hasNext()) {
        current = current.get().getChild(pathIter.next());
    }
    return current;
}

From source file:org.apache.james.mailbox.store.FakeAuthorizator.java

public static FakeAuthorizator forUserAndAdmin(String admin, String user) {
    return new FakeAuthorizator(Optional.of(admin), Optional.of(user));
}

From source file:org.basepom.mojo.propertyhelper.PropertyField.java

public static List<PropertyElement> createProperties(final Model model, final Map<String, String> values,
        final PropertyGroup propertyGroup) throws IOException, InterpolationException {
    checkNotNull(model, "model is null");
    checkNotNull(values, "values is null");
    checkNotNull(propertyGroup, "propertyGroup is null");

    final InterpolatorFactory interpolatorFactory = new InterpolatorFactory(Optional.of(model));

    final ImmutableList.Builder<PropertyElement> result = ImmutableList.builder();
    final Map<String, String> properties = propertyGroup.getProperties();

    for (String name : properties.keySet()) {
        final String value = propertyGroup.getPropertyValue(interpolatorFactory, name, values);
        result.add(new PropertyField(name, value));
    }/*from  www .ja  va  2  s  .  c  o  m*/
    return result.build();
}