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:org.sonar.server.permission.ws.ProjectWsRef.java

public static Optional<ProjectWsRef> newOptionalWsProjectRef(@Nullable String uuid, @Nullable String key) {
    if (uuid == null && key == null) {
        return Optional.absent();
    }/*www  .  ja v  a2s .c  o m*/

    return Optional.of(new ProjectWsRef(uuid, key));
}

From source file:io.urmia.md.model.storage.ObjectName.java

public static Optional<ObjectName> of(String path) {
    if (path == null)
        return Optional.absent();
    try {/*  w w  w .j  a v  a 2s  . c  om*/
        return of(new URI(path));
    } catch (URISyntaxException e) {
        return Optional.absent();
    }
}

From source file:org.opendaylight.protocol.bgp.testtool.BGPPeerBuilder.java

static void createPeer(final BGPDispatcher dispatcher, final Arguments arguments,
        final InetSocketAddress localAddress, final BGPSessionListener sessionListener,
        final BgpParameters bgpParameters) {
    final AsNumber as = arguments.getAs();
    final BGPSessionPreferences proposal = new BGPSessionPreferences(as, arguments.getHoldTimer(),
            new BgpId(localAddress.getAddress().getHostAddress()), as, Collections.singletonList(bgpParameters),
            Optional.absent());
    final StrictBGPPeerRegistry strictBGPPeerRegistry = new StrictBGPPeerRegistry();
    if (arguments.getInitiateConnection()) {
        for (final InetSocketAddress remoteAddress : arguments.getRemoteAddresses()) {
            strictBGPPeerRegistry.addPeer(StrictBGPPeerRegistry.getIpAddress(remoteAddress), sessionListener,
                    proposal);//from  w w  w . jav a  2 s . c  o m
            addFutureListener(localAddress, ((BGPDispatcherImpl) dispatcher).createClient(localAddress,
                    remoteAddress, strictBGPPeerRegistry, RETRY_TIMER));
        }
    } else {
        for (final InetSocketAddress remoteAddress : arguments.getRemoteAddresses()) {
            strictBGPPeerRegistry.addPeer(StrictBGPPeerRegistry.getIpAddress(remoteAddress), sessionListener,
                    proposal);
        }
        addFutureListener(localAddress, dispatcher.createServer(strictBGPPeerRegistry, localAddress));
    }
    LOG.debug("{} {}", sessionListener, proposal);
}

From source file:im.dadoo.teak.web.ao.FileAO.java

public Optional<String> save(MultipartFile file) throws IllegalStateException, IOException {
    if (file != null && !file.isEmpty()) {
        String srcName = Util.createFileName();
        File src = new File(srcName);
        file.transferTo(src);/*  w  ww . jav a 2s. c o  m*/
        Optional<String> dst = this.qiniuFileBO.save(src);
        src.delete();
        return dst;
    } else {
        return Optional.absent();
    }
}

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();
    }//from   w w  w .j  av a  2 s.c o  m

    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:com.streamsets.pipeline.hbase.api.common.producer.HBaseColumn.java

public HBaseColumn() {
    cf = Optional.absent();
    qualifier = Optional.absent();
    timestamp = OptionalLong.empty();
}

From source file:cf.janga.hook.core.DefaultPluginRegistration.java

public DefaultPluginRegistration(String name, String description, String version, String pluginClass,
        String pluginFileName) {/*from   w w w  . j  a  v a2 s .  co  m*/
    super(name, description, version);
    this.loadingError = Optional.absent();
    this.pluginClass = pluginClass;
    this.pluginFileName = pluginFileName;
}

From source file:at.ac.univie.isc.asio.tool.JdbcTools.java

/**
 * Attempt to find the classname of a {@code Driver}, which supports the given jdbc url.
 *
 * @param url the jdbc url/*  w w  w  .  jav a2  s.  co m*/
 * @return the driver class supporting the given jdbc url or nothing if unknown
 */
public static Optional<String> inferDriverClass(final String url) {
    Optional<String> result = Optional.absent();
    if (url != null) {
        if (url.startsWith("jdbc:mysql:")) {
            result = MYSQL_DRIVER;
        } else if (url.startsWith("jdbc:h2:")) {
            result = H2_DRIVER;
        }
    }
    return result;
}

From source file:org.dswarm.graph.gdm.utils.NodeTypeUtils.java

public static Optional<NodeType> getNodeTypeByGDMNodeType(
        final Optional<org.dswarm.graph.json.NodeType> optionalNodeType,
        final Optional<Boolean> optionalIsType) {

    if (!optionalNodeType.isPresent()) {

        return Optional.absent();
    }/* w w  w . j  a va2  s  .  com*/

    final NodeType nodeType;

    switch (optionalNodeType.get()) {

    case Literal:

        nodeType = NodeType.Literal;

        break;
    case Resource:

        if (optionalIsType.isPresent()) {

            if (Boolean.FALSE.equals(optionalIsType.get())) {

                nodeType = NodeType.Resource;
            } else {

                nodeType = NodeType.TypeResource;
            }
        } else {

            nodeType = NodeType.Resource;
        }

        break;
    case BNode:

        if (optionalIsType.isPresent()) {

            if (Boolean.FALSE.equals(optionalIsType.get())) {

                nodeType = NodeType.BNode;
            } else {

                nodeType = NodeType.TypeBNode;
            }
        } else {

            nodeType = NodeType.BNode;
        }

        break;
    default:

        nodeType = null;
    }

    return Optional.fromNullable(nodeType);
}

From source file:com.github.rinde.rinsim.ui.renderers.RenderHelper.java

RenderHelper() {
    gc = Optional.absent();
    vp = Optional.absent();
}