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:cc.ilo.cc.ilo.pipeline.prosumer.CompositeSimplePipe.java

@Override
public Optional<O> process(I input) throws Exception {
    Optional<X> result = pipe.process(input);
    if (result.isPresent())
        return subConsumer.process(result.get());
    else//from  ww  w .j  ava  2  s.  c  o  m
        return Optional.absent();
}

From source file:se.sics.caracaldb.global.NodeStats.java

public static NodeStats deserialise(ByteBuf buf) throws IOException {
    Address node = (Address) SpecialSerializers.AddressSerializer.INSTANCE.fromBinary(buf, Optional.absent());
    KeyRange range = CustomSerialisers.deserialiseKeyRange(buf);
    long storeSize = buf.readLong();
    long storeNumberOfKeys = buf.readLong();
    long ops = buf.readLong();
    return new NodeStats(node, range, storeSize, storeNumberOfKeys, ops);
}

From source file:se.sics.dozy.DozyResult.java

public static DozyResult failed(Status status, String reason) {
    return new DozyResult(status, Optional.fromNullable(reason), Optional.absent());
}

From source file:com.dangdang.ddframe.rdb.sharding.parsing.parser.context.OrderItem.java

public OrderItem(final String name, final OrderType type, final Optional<String> alias) {
    this.owner = Optional.absent();
    this.name = Optional.of(name);
    this.type = type;
    this.alias = alias;
}

From source file:org.sitemap4j.sitemapindex.SiteMapLocation.java

public SiteMapLocation(final URI location, final DateTime lastModificationTime) {
    checkNotNull(location);//from   w w  w. j  a  v a  2 s .c  o m

    this.location = location;

    if (lastModificationTime != null) {
        this.lastModificationTime = Optional.of(lastModificationTime);
    } else {
        this.lastModificationTime = Optional.absent();
    }
}

From source file:org.opendaylight.controller.netconf.cli.reader.impl.DecisionReader.java

private static ConsoleContext getContext() {
    return new ConsoleContext() {

        @Override//from   w ww. j a v  a2s  . co m
        public Optional<String> getPrompt() {
            return Optional.absent();
        }

        @Override
        public Completer getCompleter() {
            return new AggregateCompleter(YES_NO_COMPLETER, new StringsCompleter(IOUtil.SKIP));
        }

    };
}

From source file:org.eclipse.mylyn.internal.wikitext.commonmark.inlines.BackslashEscapeSpan.java

@Override
public Optional<? extends Inline> createInline(Cursor cursor) {
    char c = cursor.getChar();
    if (c == '\\' && cursor.hasNext()) {
        if (cursor.getNext() == '\n') {
            return Optional.of(new HardLineBreak(cursor.getLineAtOffset(), cursor.getOffset(), 2));
        } else if (ESCAPABLE.matches(cursor.getNext())) {
            return Optional
                    .of(new EscapedCharacter(cursor.getLineAtOffset(), cursor.getOffset(), cursor.getNext()));
        }/*from ww w.  j a  v a2 s .  c om*/
    }
    return Optional.absent();
}

From source file:com.facebook.presto.metadata.QualifiedTablePrefix.java

public QualifiedTablePrefix(String catalogName) {
    this.catalogName = checkCatalogName(catalogName);
    this.schemaName = Optional.absent();
    this.tableName = Optional.absent();
}

From source file:org.apache.gobblin.data.management.copy.replication.CopyRouteGeneratorOptimizer.java

@Override
public Optional<CopyRoute> getPullRoute(ReplicationConfiguration rc, EndPoint copyTo) {
    if (rc.getCopyMode() == ReplicationCopyMode.PUSH)
        return Optional.absent();

    DataFlowTopology topology = rc.getDataFlowToplogy();
    List<DataFlowTopology.DataFlowPath> paths = topology.getDataFlowPaths();

    for (DataFlowTopology.DataFlowPath p : paths) {
        List<CopyRoute> routes = p.getCopyRoutes();
        if (routes.isEmpty()) {
            continue;
        }//from  ww w.j a v  a  2  s  .  c om

        // All routes under a path pointing to the same copyTo (replica)
        if (routes.get(0).getCopyTo().equals(copyTo)) {
            return getOptimizedCopyRoute(routes);
        }
    }

    return Optional.absent();
}

From source file:net.caseif.flint.common.util.helper.JsonHelper.java

public static Optional<JsonObject> readJson(File file) throws IllegalArgumentException, IOException {
    if (file.exists()) {
        try (FileReader reader = new FileReader(file)) {
            JsonElement el = new JsonParser().parse(reader);
            if (el.isJsonObject()) {
                return Optional.of(el.getAsJsonObject());
            }/*from w ww .j  a v  a  2s . com*/
        }
    }
    return Optional.absent();
}