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:org.opendaylight.vtn.manager.it.util.inventory.InventoryUtils.java

/**
 * Determine whether the given node has at least one edge port in up state
 * or not./*ww w  .j  a v a  2  s.  c om*/
 *
 * @param rtx  A read-only MD-SAL datastore transaction.
 * @param nid  The node identifier string.
 * @return  {@code true} is returned if the given node has at least one
 *          edge port in up state. Otherwise {@code false} is returned.
 */
public static boolean hasEdgePort(ReadTransaction rtx, String nid) {
    Optional<VtnNode> opt = DataStoreUtils.read(rtx, getVtnNodeIdentifier(nid));
    return (opt.isPresent()) ? hasEdgePort(opt.get()) : false;
}

From source file:com.google.devtools.build.lib.bazel.repository.downloader.HttpConnection.java

/**
 * Attempts to detect the encoding the HTTP reponse is using.
 *
 * <p>This attempts to read the Content-Encoding header, then the Content-Type header,
 * then just falls back to UTF-8.</p>
 *
 * @throws IOException If something goes wrong (the encoding isn't parsable or is, but isn't
 * supported by the system)./* ww w  . ja va2 s. c  o m*/
 */
@VisibleForTesting
static Charset getEncoding(HttpURLConnection connection) throws IOException {
    String encoding = connection.getContentEncoding();
    if (encoding != null) {
        if (Charset.availableCharsets().containsKey(encoding)) {
            try {
                return Charset.forName(encoding);
            } catch (IllegalArgumentException | UnsupportedOperationException e) {
                throw new IOException("Got invalid encoding from " + connection.getURL() + ": " + encoding);
            }
        } else {
            throw new IOException("Got unavailable encoding from " + connection.getURL() + ": " + encoding);
        }
    }
    encoding = connection.getContentType();
    if (encoding == null) {
        return StandardCharsets.UTF_8;
    }
    try {
        MediaType mediaType = MediaType.parse(encoding);
        if (mediaType == null) {
            return StandardCharsets.UTF_8;
        }
        Optional<Charset> charset = mediaType.charset();
        if (charset.isPresent()) {
            return charset.get();
        }
    } catch (IllegalArgumentException | IllegalStateException e) {
        throw new IOException("Got invalid encoding from " + connection.getURL() + ": " + encoding);
    }
    return StandardCharsets.UTF_8;
}

From source file:io.mesosphere.mesos.frameworks.cassandra.framework.Main.java

static String frameworkName(final Optional<String> clusterName) {
    if (clusterName.isPresent()) {
        return "cassandra." + clusterName.get();
    } else {//from   w  ww.ja  v  a 2  s .  c  o  m
        return "cassandra";
    }
}

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

public static <T extends StoreTreeNode<T>> Entry<YangInstanceIdentifier, T> findClosestsOrFirstMatch(
        final T tree, final YangInstanceIdentifier path, final Predicate<T> predicate) {
    Optional<T> parent = Optional.of(tree);
    Optional<T> current = Optional.of(tree);

    int nesting = 0;
    Iterator<PathArgument> pathIter = path.getPathArguments().iterator();
    while (current.isPresent() && pathIter.hasNext() && !predicate.apply(current.get())) {
        parent = current;/* www  .j a  v  a2  s  . co m*/
        current = current.get().getChild(pathIter.next());
        nesting++;
    }
    if (current.isPresent()) {
        final YangInstanceIdentifier currentPath = path.getAncestor(nesting);
        return new SimpleImmutableEntry<>(currentPath, current.get());
    }

    /*
     * Subtracting 1 from nesting level at this point is safe, because we
     * cannot reach here with nesting == 0: that would mean the above check
     * for current.isPresent() failed, which it cannot, as current is always
     * present. At any rate we verify state just to be on the safe side.
     */
    Verify.verify(nesting > 0);
    return new SimpleImmutableEntry<>(path.getAncestor(nesting - 1), parent.get());
}

From source file:com.eucalyptus.util.async.AsyncRequests.java

private static <A extends BaseMessage, B extends BaseMessage> B sendSync(final ServiceConfiguration config,
        final Optional<CallerContext> callerContext, final A msg) throws Exception {
    if (callerContext.isPresent()) {
        callerContext.get().apply(msg);/*  w  ww. j a  v  a 2s . com*/
    }

    if (config.isVmLocal()) {
        return ServiceContext.send(config.getComponentId(), msg);
    } else {
        try {
            Request<A, B> req = newRequest(new MessageCallback<A, B>() {
                {
                    this.setRequest(msg);
                }

                @Override
                public void fire(B msg) {
                    Logs.extreme().debug(msg.toSimpleString());
                }
            });
            return req.sendSync(config);
        } catch (InterruptedException ex) {
            Thread.currentThread().interrupt();
            throw ex;
        }
    }
}

From source file:at.ac.univie.isc.asio.d2rq.D2rqTools.java

/**
 * Find a single resource with given rdf:type in the model if one is present.
 *
 * @param model model to search in/*from w  w  w . j a va 2  s  .c  o  m*/
 * @param type  type of required resource
 * @return the resource if present
 * @throws IllegalArgumentException if multiple resources with matching type are found
 */
static Optional<Resource> findSingleOfType(final Model model, final Resource type) {
    final ResIterator it = model.listResourcesWithProperty(RDF.type, type);
    final Optional<Resource> found = it.hasNext() ? Optional.of(it.nextResource())
            : Optional.<Resource>absent();
    if (found.isPresent() && it.hasNext()) {
        throw new IllegalArgumentException("found multiple <" + type + "> resources");
    }
    return found;
}

From source file:google.registry.request.RequestParameters.java

/**
 * Returns first request parameter associated with {@code name} parsed as an optional
 * {@link InetAddress} (which might be IPv6).
 *
 * @throws BadRequestException if request parameter named {@code name} is present but could not
 *     be parsed as an {@link InetAddress}
 *///from   w w  w  .ja v a 2  s .c  o  m
public static Optional<InetAddress> extractOptionalInetAddressParameter(HttpServletRequest req, String name) {
    Optional<String> paramVal = extractOptionalParameter(req, name);
    if (!paramVal.isPresent()) {
        return Optional.absent();
    }
    try {
        return Optional.of(InetAddresses.forString(paramVal.get()));
    } catch (IllegalArgumentException e) {
        throw new BadRequestException("Not an IPv4 or IPv6 address: " + name);
    }
}

From source file:dagger2.internal.codegen.Util.java

/**
 * Wraps an {@link Optional} of a type in an {@code Optional} of a {@link Wrapper} for that type.
 *//*from   w w  w . ja v a2s  .c  om*/
static <T> Optional<Equivalence.Wrapper<T>> wrapOptionalInEquivalence(Equivalence<T> equivalence,
        Optional<T> optional) {
    return optional.isPresent() ? Optional.of(equivalence.wrap(optional.get()))
            : Optional.<Equivalence.Wrapper<T>>absent();
}

From source file:at.ac.univie.isc.asio.d2rq.LoadD2rqModel.java

/**
 * Replace any existing {@link de.fuberlin.wiwiss.d2rq.vocab.D2RConfig#baseURI} with the given.
 * If no {@link de.fuberlin.wiwiss.d2rq.vocab.D2RConfig#Server} is present, create one and attach the given uri.
 *
 * @param model   given configuration/*from   w ww  .j  av  a2  s.c  om*/
 * @param baseUri uri that should be injected
 * @return modified model
 */
static Model injectBaseUri(final Model model, final String baseUri) {
    final Optional<Resource> maybeServer = D2rqTools.findSingleOfType(model, D2RConfig.Server);
    final Resource server;
    if (maybeServer.isPresent()) {
        server = maybeServer.get();
    } else { // create an empty one
        server = model.createResource().addProperty(RDF.type, D2RConfig.Server);
    }
    server.removeAll(D2RConfig.baseURI);
    server.addProperty(D2RConfig.baseURI, model.createResource(baseUri));
    return model;
}

From source file:org.opendaylight.controller.netconf.util.messages.NetconfMessageAdditionalHeader.java

public static String toString(String userName, String hostAddress, String port, String transport,
        Optional<String> sessionIdentifier) {
    Preconditions.checkNotNull(userName);
    Preconditions.checkNotNull(hostAddress);
    Preconditions.checkNotNull(port);//from  w ww  .  j  av a2s  . co m
    Preconditions.checkNotNull(transport);
    String identifier = sessionIdentifier.isPresent() ? sessionIdentifier.get() : "";
    return "[" + userName + SC + hostAddress + ":" + port + SC + transport + SC + identifier + SC + "]"
            + System.lineSeparator();
}