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:net.diogobohm.timed.impl.codec.TaskCodecImpl.java

@Override
public Task decode(DBTask task, Activity activity, Project project, Set<Tag> tags) {
    Date start = null;//w  w  w  .  j  av  a  2 s  .  com
    Optional<Date> end = Optional.absent();
    String description = task.getDescription();

    try {
        start = DATETIME_FORMATTER.parse(task.getStartDateTime());
        if (task.getFinishDateTime() != null) {
            end = Optional.of(DATETIME_FORMATTER.parse(task.getFinishDateTime()));
        }
    } catch (ParseException ex) {
        ex.printStackTrace();
    }

    return new Task(activity, project, start, end, description, tags);
}

From source file:org.opendaylight.unimgr.mef.nrp.common.MountPointHelper.java

/**
 * Find a node's NETCONF mount point and then retrieve its DataBroker.
 * e.g./*from  w  w w .  j  a  v  a2s.co  m*/
 * http://localhost:8080/restconf/config/network-topology:network-topology/
 *        topology/topology-netconf/node/{nodeName}/yang-ext:mount/
 */
public static Optional<DataBroker> getDataBroker(MountPointService mountService, String nodeName) {
    NodeId nodeId = new NodeId(nodeName);

    InstanceIdentifier<Node> nodeInstanceId = InstanceIdentifier.builder(NetworkTopology.class)
            .child(Topology.class, new TopologyKey(new TopologyId(TopologyNetconf.QNAME.getLocalName())))
            .child(Node.class, new NodeKey(nodeId)).build();

    final Optional<MountPoint> nodeOptional = mountService.getMountPoint(nodeInstanceId);

    if (!nodeOptional.isPresent()) {
        return Optional.absent();
    }

    MountPoint nodeMountPoint = nodeOptional.get();
    return Optional.of(nodeMountPoint.getService(DataBroker.class).get());
}

From source file:org.eclipse.buildship.core.workspace.internal.EclipseVmUtil.java

private static Optional<IVMInstall> findRegisteredVM(String version) {
    Optional<IExecutionEnvironment> possibleExecutionEnvironment = findExecutionEnvironment(version);
    if (!possibleExecutionEnvironment.isPresent()) {
        return Optional.absent();
    }//from   w w  w .j  ava 2 s  .  c  om

    IExecutionEnvironment executionEnvironment = possibleExecutionEnvironment.get();
    IVMInstall defaultVm = executionEnvironment.getDefaultVM();
    if (defaultVm != null) {
        return Optional.of(defaultVm);
    } else {
        IVMInstall firstVm = Iterables.getFirst(Arrays.asList(executionEnvironment.getCompatibleVMs()), null);
        return Optional.fromNullable(firstVm);
    }
}

From source file:com.treasuredata.client.TDClientHttpException.java

public Optional<Date> getRetryAfter() {
    if (retryAfter == -1) {
        return Optional.absent();
    } else {/* w  ww . j a  va2 s  . c  o  m*/
        return Optional.of(new Date(retryAfter));
    }
}

From source file:com.dangdang.ddframe.rdb.sharding.parser.result.merger.AggregationColumn.java

@Override
public Optional<String> getColumnName() {
    return Optional.of(expression);
}

From source file:org.eclipse.buildship.core.util.file.FileUtils.java

/**
 * Derives the absolute path from the specified {@code File} instance.
 *
 * @param file the file from which to get the absolute path
 * @return the absolute path if the file is not {@code null}, otherwise
 * {@link Optional#absent()}//from w w w  . j av a  2 s .c  o m
 */
public static Optional<String> getAbsolutePath(File file) {
    if (file == null) {
        return Optional.absent();
    } else {
        return Optional.of(file.getAbsolutePath());
    }
}

From source file:org.opennms.newts.stress.Query.java

Optional<Timestamp> getEnd() {
    return Optional.of(m_end);
}

From source file:org.opendaylight.controller.netconf.confignetconfconnector.mapping.attributes.mapping.SimpleAttributeMappingStrategy.java

@Override
public Optional<String> mapAttribute(Object value) {
    if (value == null) {
        return Optional.absent();
    }/*w ww  . ja v  a2s  .c  om*/

    String expectedClass = getOpenType().getClassName();
    String realClass = value.getClass().getName();
    Preconditions.checkArgument(realClass.equals(expectedClass),
            "Type mismatch, expected " + expectedClass + " but was " + realClass);

    WriterPlugin prefferedPlugin = writerPlugins.get(value.getClass().getCanonicalName());
    prefferedPlugin = prefferedPlugin == null ? writerPlugins.get(DEFAULT_WRITER_PLUGIN) : prefferedPlugin;
    return Optional.of(prefferedPlugin.writeObject(value));
}

From source file:org.sosy_lab.cpachecker.cfa.model.c.CStatementEdge.java

@Override
public Optional<CStatement> getRawAST() {
    return Optional.of((CStatement) statement);
}

From source file:nih.quack.jythonpygments.Lexers.java

/**
 * Lookup a Pygments lexer by an alias.//from   w ww. ja va 2s  .  com
 *
 * @param gateway
 * @param alias   language alias for which a lexer is queried
 */
public Optional<Object> lookupLexer(PyGateway gateway, String alias) {
    Object result = lexerCache.get(alias);

    if (result == null) {
        result = evalLookupLexer(gateway, alias, NULL);
        lexerCache.put(alias, result);
    }

    if (result == NULL) {
        return Optional.absent();
    } else {
        return Optional.of(result);
    }
}