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:eu.numberfour.n4js.external.RebuildWorkspaceProjectsScheduler.java

/**
 * Schedules a build with the given projects. Does nothing if the {@link Platform platform} is not running, or the
 * iterable of projects is empty.//  ww w  .  j  a  va 2  s .c o m
 *
 * @param toUpdate
 *            an iterable of projects to build.
 */
public void scheduleBuildIfNecessary(final Iterable<IProject> toUpdate) {
    if (Platform.isRunning() && !Iterables.isEmpty(toUpdate)) {
        final Workspace workspace = (Workspace) ResourcesPlugin.getWorkspace();
        final IBuildConfiguration[] projectsToReBuild = from(asList(workspace.getBuildOrder()))
                .filter(config -> Iterables.contains(toUpdate, config.getProject()))
                .toArray(IBuildConfiguration.class);

        if (!Arrays2.isEmpty(projectsToReBuild)) {
            new RebuildWorkspaceProjectsJob(projectsToReBuild).schedule();
        }
    }
}

From source file:org.apache.brooklyn.core.config.ConfigConstraints.java

/**
 * Checks all constraints of all config keys available to an entity.
 * <p>/*from  w w  w. j a  v  a2  s  .c om*/
 * If a constraint is a {@link BrooklynObjectPredicate} then
 * {@link BrooklynObjectPredicate#apply(Object, BrooklynObject)} will be used.
 */
public static void assertValid(Entity entity) {
    Iterable<ConfigKey<?>> violations = new EntityConfigConstraints(entity).getViolations();
    if (!Iterables.isEmpty(violations)) {
        throw new ConstraintViolationException(errorMessage(entity, violations));
    }
}

From source file:com.google.code.jgntp.internal.message.read.GntpMessageResponseParser.java

public GntpMessageResponse parse(String s) {
    Iterable<String> splitted = separatorSplitter.split(s);
    Preconditions.checkState(!Iterables.isEmpty(splitted), "Empty message received from Growl");

    Iterator<String> iter = splitted.iterator();
    String statusLine = iter.next();
    Preconditions.checkState(// w ww. j ava 2  s  .  co  m
            statusLine.startsWith(GntpMessage.PROTOCOL_ID + "/" + GntpVersion.ONE_DOT_ZERO.toString()),
            "Unknown protocol version");

    Iterable<String> statusLineIterable = statusLineSplitter.split(statusLine);
    String messageTypeText = Iterables.get(statusLineIterable, 1).substring(1);
    GntpMessageType messageType = GntpMessageType.valueOf(messageTypeText);

    Map<String, String> headers = Maps.newHashMap();
    while (iter.hasNext()) {
        String[] splittedHeader = iter.next().split(":", 2);
        headers.put(splittedHeader[0], splittedHeader[1].trim());
    }

    switch (messageType) {
    case OK:
        return createOkMessage(headers);
    case CALLBACK:
        return createCallbackMessage(headers);
    case ERROR:
        return createErrorMessage(headers);
    default:
        throw new IllegalStateException("Unknown response message type: " + messageType);
    }
}

From source file:google.registry.util.DateTimeUtils.java

/** Returns the latest element in a {@link DateTime} iterable. */
public static DateTime latestOf(Iterable<DateTime> dates) {
    checkArgument(!Iterables.isEmpty(dates));
    return Ordering.<DateTime>natural().max(dates);
}

From source file:org.eclipse.xtext.ui.editor.outline.impl.OutlineFilterAndSorter.java

public IOutlineNode[] filterAndSort(Iterable<IOutlineNode> nodes) {
    final Iterable<IFilter> enabledFilters = getEnabledFilters();
    Iterable<IOutlineNode> filteredNodes = null;
    if (Iterables.isEmpty(enabledFilters)) {
        filteredNodes = nodes;//from   w  w  w  .  ja  v  a 2  s  .com
    } else {
        filteredNodes = Iterables.filter(nodes, new Predicate<IOutlineNode>() {
            @Override
            public boolean apply(final IOutlineNode node) {
                return Iterables.all(enabledFilters, new Predicate<IFilter>() {
                    @Override
                    public boolean apply(IFilter filter) {
                        return filter.apply(node);
                    }
                });
            }
        });
    }
    IOutlineNode[] nodesAsArray = Iterables.toArray(filteredNodes, IOutlineNode.class);
    if (comparator != null && isSortingEnabled())
        Arrays.sort(nodesAsArray, comparator);
    return nodesAsArray;
}

From source file:org.janusgraph.testutil.JanusGraphAssert.java

public static boolean isEmpty(Object obj) {
    Preconditions.checkArgument(obj != null);
    if (obj instanceof Traversal)
        return !((Traversal) obj).hasNext();
    else if (obj instanceof Collection)
        return ((Collection) obj).isEmpty();
    else if (obj instanceof Iterable)
        return Iterables.isEmpty((Iterable) obj);
    else if (obj instanceof Iterator)
        return !((Iterator) obj).hasNext();
    else if (obj.getClass().isArray())
        return Array.getLength(obj) == 0;
    throw new IllegalArgumentException("Cannot determine size of: " + obj);
}

From source file:org.jpmml.evaluator.TargetUtil.java

/**
 * Evaluates the {@link Targets} element for {@link MiningFunctionType#REGRESSION regression} models.
 *//*ww w  . j a va  2 s .co  m*/
static public Map<FieldName, ? extends Number> evaluateRegression(Map<FieldName, ? extends Number> predictions,
        ModelEvaluationContext context) {
    ModelEvaluator<?> modelEvaluator = context.getModelEvaluator();

    Targets targets = modelEvaluator.getTargets();
    if (targets == null || Iterables.isEmpty(targets)) {
        return predictions;
    }

    Map<FieldName, Number> result = Maps.newLinkedHashMap();

    Collection<? extends Map.Entry<FieldName, ? extends Number>> entries = predictions.entrySet();
    for (Map.Entry<FieldName, ? extends Number> entry : entries) {
        FieldName key = entry.getKey();
        Number value = entry.getValue();

        Target target = modelEvaluator.getTarget(key);
        if (target != null) {

            if (value == null) {
                value = getDefaultValue(target);
            } // End if

            if (value != null) {
                value = processValue(target, value);
            }
        }

        result.put(key, value);
    }

    return result;
}

From source file:uk.gov.gchq.koryphe.impl.function.IsEmpty.java

@Override
@SuppressFBWarnings(value = "DE_MIGHT_IGNORE", justification = "Any exceptions are to be ignored")
public Boolean apply(final Iterable input) {
    if (null == input) {
        throw new IllegalArgumentException("Input cannot be null");
    }//  w  w  w.  j  a v a2s .c  o  m
    try {
        return Iterables.isEmpty(input);
    } finally {
        CloseableUtil.close(input);
    }
}

From source file:org.apache.abdera2.ext.license.LicenseHelper.java

private static boolean contains(Iterable<Link> list) {
    if (list == null)
        return false;
    return !Iterables.isEmpty(list);
}

From source file:google.registry.tools.CheckSnapshotCommand.java

@Override
public void run() throws Exception {
    Iterable<DatastoreBackupInfo> backups = DatastoreBackupService.get().findAllByNamePrefix(snapshotName);
    if (Iterables.isEmpty(backups)) {
        System.err.println("No snapshot found with name: " + snapshotName);
        return;/*from   w  ww . j a va 2s  .  c o m*/
    }
    for (DatastoreBackupInfo backup : backups) {
        System.out.println(backup.getInformation());
    }
}