Example usage for com.google.common.collect Iterables isEmpty

Introduction

In this page you can find the example usage for com.google.common.collect Iterables isEmpty.

Prototype

public static boolean isEmpty(Iterable<?> iterable)

Source Link

Document

Determines if the given iterable contains no elements.

Usage

From source file:de.dobermai.mqttbot.config.IRCProperties.java

@PostConstruct
public void postConstruct() {
    //Governator does not allow property lists out of the box. See https://github.com/Netflix/governator/issues/74

    ircChannels = Splitter.on(",").omitEmptyStrings().trimResults().split(ircChannelsRawString);

    if (Iterables.isEmpty(ircChannels)) {
        log.warn("No IRC channels were set!");
    }//from   ww  w  .  j a  v  a 2s.c  o m
}

From source file:com.palantir.util.paging.SimpleResultsPage.java

/**
 * Constructs a page of iterable chunks.
 *
 * @param chunks a set of chunks//  w w w .  j  ava  2 s. c o  m
 */
public SimpleResultsPage(Iterable<T> chunks) {
    this(chunks, !Iterables.isEmpty(chunks));
}

From source file:org.wso2.carbon.identity.application.authenticator.fido.u2f.data.messages.AuthenticateRequestData.java

public AuthenticateRequestData(String appId, Iterable<? extends DeviceRegistration> devices, U2F u2f,
        ChallengeGenerator challengeGenerator) throws U2fException {
    if (Iterables.isEmpty(devices)) {
        throw new NoDevicesRegisteredException();
    }//  www  .  j  a v a 2  s  .  c om
    ImmutableList.Builder<AuthenticateRequest> requestBuilder = ImmutableList.builder();
    byte[] challenge = challengeGenerator.generateChallenge();
    for (DeviceRegistration device : devices) {
        requestBuilder.add(u2f.startAuthentication(appId, device, challenge));
    }
    this.authenticateRequests = requestBuilder.build();
}

From source file:com.spectralogic.ds3cli.views.csv.DetailedObjectsPhysicalView.java

@Override
public String render(final GetDetailedObjectsResult obj) {
    final Iterable<DetailedS3Object> detailedS3Objects = obj.getResult();
    if (detailedS3Objects == null || Iterables.isEmpty(detailedS3Objects)) {
        return "No objects returned";
    }/*w ww .j ava2  s .co m*/

    final ImmutableList<String> headers = ImmutableList.of("Name", "Bucket", "Owner", "Size", "Type",
            "Creation Date", "Barcode", "State");

    final FluentIterable<DetailedTapeInfo> objects = FluentIterable.from(detailedS3Objects)
            .filter(new Predicate<DetailedS3Object>() {
                @Override
                public boolean apply(@Nullable final DetailedS3Object input) {
                    return input.getBlobs() != null && !Guard.isNullOrEmpty(input.getBlobs().getObjects());
                }
            }).transformAndConcat(new DetailedDs3ObjectMapper());

    return new CsvOutput<>(headers, objects, new CsvOutput.ContentFormatter<DetailedTapeInfo>() {
        @Override
        public Iterable<String> format(final DetailedTapeInfo content) {

            final ImmutableList.Builder<String> csvRow = ImmutableList.builder();
            final DetailedS3Object detailedObject = content.getDetailedS3Object();
            final Tape tape = content.getTape();

            csvRow.add(nullGuard(detailedObject.getName()));
            csvRow.add(nullGuardToString(detailedObject.getBucketId()));
            csvRow.add(nullGuardToString(detailedObject.getOwner()));
            csvRow.add(nullGuardToString(detailedObject.getSize()));
            csvRow.add(nullGuardToString(detailedObject.getType()));
            csvRow.add(nullGuardFromDate(detailedObject.getCreationDate(), DATE_FORMAT));
            csvRow.add(nullGuard(tape.getBarCode()));
            csvRow.add(nullGuardToString(tape.getState()));
            return csvRow.build();
        }
    }).toString();
}

From source file:org.eclipse.xtend.core.scoping.LocalResourceFilteringTypeScope.java

private boolean isFiltered(QualifiedName name) {
    Iterable<IEObjectDescription> exportedObjects = filterDescription
            .getExportedObjects(TypesPackage.Literals.JVM_TYPE, name, false);
    return !Iterables.isEmpty(exportedObjects);
}

From source file:org.jboss.hal.dmr.ModelNodeHelper.java

/**
 * Tries to get a deeply nested model node from the specified model node. Nested paths must be separated with "/".
 *
 * @param modelNode The model node to read from
 * @param path      A path separated with "/"
 *
 * @return The nested node or an empty / undefined model node
 *///from ww  w .ja va2s . c  om
public static ModelNode failSafeGet(ModelNode modelNode, String path) {
    ModelNode undefined = new ModelNode();

    if (Strings.emptyToNull(path) != null) {
        Iterable<String> keys = Splitter.on('/').omitEmptyStrings().trimResults().split(path);
        if (!Iterables.isEmpty(keys)) {
            ModelNode context = modelNode;
            for (String key : keys) {
                String safeKey = decodeValue(key);
                if (context.hasDefined(safeKey)) {
                    context = context.get(safeKey);
                } else {
                    context = undefined;
                    break;
                }
            }
            return context;
        }
    }

    return undefined;
}

From source file:org.jclouds.s3.binders.BindIterableAsPayloadToDeleteRequest.java

@SuppressWarnings("unchecked")
@Override/*from   w  ww  .  j  a  v a  2s  .  c  o  m*/
public <R extends HttpRequest> R bindToRequest(R request, Object input) {
    checkArgument(checkNotNull(input, "input is null") instanceof Iterable,
            "this binder is only valid for an Iterable");
    checkNotNull(request, "request is null");

    Iterable<String> keys = (Iterable<String>) input;
    checkArgument(!Iterables.isEmpty(keys), "The list of keys should not be empty.");

    String content;
    try {
        XMLBuilder rootBuilder = XMLBuilder.create("Delete");
        for (String key : keys) {
            XMLBuilder ownerBuilder = rootBuilder.elem("Object");
            XMLBuilder keyBuilder = ownerBuilder.elem("Key").text(key);
        }

        Properties outputProperties = new Properties();
        outputProperties.put(OutputKeys.OMIT_XML_DECLARATION, "yes");
        content = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" + rootBuilder.asString(outputProperties);
    } catch (ParserConfigurationException pce) {
        throw Throwables.propagate(pce);
    } catch (TransformerException te) {
        throw Throwables.propagate(te);
    }

    Payload payload = Payloads.newStringPayload(content);
    payload.getContentMetadata().setContentType(MediaType.TEXT_XML);
    byte[] md5 = md5().hashString(content, UTF_8).asBytes();
    payload.getContentMetadata().setContentMD5(md5);
    request.setPayload(payload);
    return request;
}

From source file:dagger.internal.codegen.writer.TypeVariableName.java

@Override
public Appendable write(Appendable appendable, Context context) throws IOException {
    appendable.append(name);//  w  w w.j a va2  s  . c  o  m
    if (!Iterables.isEmpty(extendsBounds)) {
        appendable.append(" extends ");
        Iterator<? extends TypeName> iter = extendsBounds.iterator();
        iter.next().write(appendable, context);
        while (iter.hasNext()) {
            appendable.append(" & ");
            iter.next().write(appendable, context);
        }
    }
    return appendable;
}

From source file:com.palantir.giraffe.file.base.CrossSystemTransfers.java

public static void moveDirectory(Path source, Path target, CopyFlags flags) throws IOException {
    checkPaths(source, target, flags);/*w  w  w  .  ja va2s.  co  m*/
    checkNoAtomicMove(source, target, flags);

    if (!Iterables.isEmpty(Files.newDirectoryStream(source))) {
        throw new DirectoryNotEmptyException(source.toString());
    }

    if (flags.replaceExisting) {
        Files.deleteIfExists(target);
    }
    Files.createDirectory(target);
    Files.delete(source);
}

From source file:brooklyn.entity.basic.BasicStartableImpl.java

@Override
public void start(Collection<? extends Location> locations) {
    log.info("Starting entity " + this + " at " + locations);
    addLocations(locations);/*w w  w .  j a  v  a  2 s .c o m*/

    // essentially does StartableMethods.start(this, locations),
    // but optionally filters locations for each child

    brooklyn.location.basic.Locations.LocationsFilter filter = getConfig(LOCATIONS_FILTER);
    Iterable<Entity> startables = filterStartableManagedEntities(getChildren());
    if (startables == null || Iterables.isEmpty(startables))
        return;

    List<Task<?>> tasks = Lists.newArrayList();
    for (final Entity entity : startables) {
        Collection<? extends Location> l2 = locations;
        if (filter != null) {
            l2 = filter.filterForContext(new ArrayList<Location>(locations), entity);
            log.debug("Child " + entity + " of " + this + " being started in filtered location list: " + l2);
        }
        tasks.add(Entities.invokeEffectorWithArgs(this, entity, Startable.START, l2));
    }
    for (Task<?> t : tasks)
        t.getUnchecked();
}