Example usage for java.util Collections emptySet

List of usage examples for java.util Collections emptySet

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Introduction

In this page you can find the example usage for java.util Collections emptySet.

Prototype

@SuppressWarnings("unchecked")
public static final <T> Set<T> emptySet()

Source Link

Document

Returns an empty set (immutable).

Usage

From source file:com.cloudera.oryx.app.serving.als.model.ALSServingModel.java

/**
 * @param user user to get known items for
 * @return set of known items for the user (immutable, but thread-safe)
 *//*ww  w.j a v a2  s .co m*/
public Set<String> getKnownItems(String user) {
    ObjSet<String> knownItems = doGetKnownItems(user);
    if (knownItems == null) {
        return Collections.emptySet();
    }
    synchronized (knownItems) {
        if (knownItems.isEmpty()) {
            return Collections.emptySet();
        }
        // Must copy since the original object is synchronized
        return HashObjSets.newImmutableSet(knownItems);
    }
}

From source file:se.uu.it.cs.recsys.service.resource.impl.RecommendationGenerator.java

Set<Integer> filterOnPlanYear(Set<Integer> courseId) {
    if (courseId.isEmpty()) {
        return Collections.emptySet();
    }//from ww w .  j  a  v a2 s  . co  m

    Set<se.uu.it.cs.recsys.persistence.entity.Course> filteredCourse = this.courseRepository
            .findByAutoGenIds(courseId).stream()
            .filter(ConstraintSolverPreferenceBuilder
                    .inPlanYearPredicate(this.constraintPref.getIndexedScheduleInfo()))
            .sorted((se.uu.it.cs.recsys.persistence.entity.Course one,
                    se.uu.it.cs.recsys.persistence.entity.Course two) -> Integer.compare(one.getAutoGenId(),
                            two.getAutoGenId()))
            .collect(Collectors.toSet());

    filteredCourse.forEach(course -> LOGGER.debug("Filtered course: {}", course));

    return filteredCourse.stream().map(course -> course.getAutoGenId()).collect(Collectors.toSet());
}

From source file:com.orange.cepheus.cep.SubscriptionManagerTest.java

@Test
public void testUnsubscribeOnProviderRemoval() {

    // Mock the task scheduler and capture the runnable
    ArgumentCaptor<Runnable> runnableArg = ArgumentCaptor.forClass(Runnable.class);
    when(taskScheduler.scheduleWithFixedDelay(runnableArg.capture(), anyLong()))
            .thenReturn(Mockito.mock(ScheduledFuture.class));

    // Mock the response to the subsribeContext
    ArgumentCaptor<SuccessCallback> successArg = ArgumentCaptor.forClass(SuccessCallback.class);
    ListenableFuture<SubscribeContextResponse> responseFuture = Mockito.mock(ListenableFuture.class);
    doNothing().when(responseFuture).addCallback(successArg.capture(), any());

    // Return the mocked future on subscription
    when(ngsiClient.subscribeContext(any(), any(), any())).thenReturn(responseFuture);

    Configuration configuration = getBasicConf();
    subscriptionManager.setConfiguration(configuration);

    // Execute scheduled runnable
    runnableArg.getValue().run();//from w ww  .jav  a2s.c om

    // Return the SubscribeContextResponse
    callSuccessCallback(successArg);

    // Mock future for unsubscribeContext
    ListenableFuture<UnsubscribeContextResponse> responseFuture2 = Mockito.mock(ListenableFuture.class);
    doNothing().when(responseFuture2).addCallback(successArg.capture(), any());
    when(ngsiClient.unsubscribeContext(eq("http://iotAgent"), eq(null), eq("12345678")))
            .thenReturn(responseFuture2);

    // Reset conf should trigger unsubsribeContext
    Configuration emptyConfiguration = getBasicConf();
    emptyConfiguration.getEventTypeIns().get(0).setProviders(Collections.emptySet());
    subscriptionManager.setConfiguration(emptyConfiguration);

    // Check that unsubsribe is called
    Assert.notNull(successArg.getValue());

}

From source file:com.googlecode.fightinglayoutbugs.WebPage.java

@edu.umd.cs.findbugs.annotations.SuppressWarnings("SBSC")
public Collection<RectangularRegion> getRectangularRegionsCoveredBy(Collection<String> jQuerySelectors) {
    if (jQuerySelectors.isEmpty()) {
        return Collections.emptySet();
    }/*from w ww .j a va  2s.  c o m*/
    // 1.) Assemble JavaScript to select elements ...
    Iterator<String> i = jQuerySelectors.iterator();
    String js = "jQuery('" + i.next().replace("'", "\\'");
    while (i.hasNext()) {
        js += "').add('" + i.next().replace("'", "\\'");
    }
    js += "').filter(':visible')";
    // 2.) Assemble JavaScript function to fill an array with rectangular region of each selected element ...
    js = "function() { " + "var a = new Array(); " + js + ".each(function(i, e) { " + "var j = jQuery(e); "
            + "var o = j.offset(); "
            + "a.push({ top: o.top, left: o.left, width: j.width(), height: j.height() }); " + "}); "
            + "return a; " + "}";
    // 3.) Execute JavaScript function ...
    @SuppressWarnings("unchecked")
    List<Map<String, Number>> list = (List<Map<String, Number>>) executeJavaScript("return (" + js + ")()");
    // 4.) Convert JavaScript return value to Java return value ...
    if (list.isEmpty()) {
        return Collections.emptySet();
    }
    Collection<RectangularRegion> result = new ArrayList<RectangularRegion>(list.size());
    for (Map<String, Number> map : list) {
        double left = map.get("left").doubleValue();
        double width = map.get("width").doubleValue();
        double top = map.get("top").doubleValue();
        double height = map.get("height").doubleValue();
        if (height > 0 && width > 0) {
            int x1 = (int) left;
            int y1 = (int) top;
            int x2 = (int) Math.round(left + width - 0.5000001);
            int y2 = (int) Math.round(top + height - 0.5000001);
            if (x2 >= 0 && y2 >= 0) {
                if (x1 < 0) {
                    x1 = 0;
                }
                if (y1 < 0) {
                    y1 = 0;
                }
                if (x1 <= x2 && y1 <= y2) {
                    result.add(new RectangularRegion(x1, y1, x2, y2));
                }
            }
        }
    }
    return result;
}

From source file:org.commonjava.indy.httprox.HttpProxyTest.java

@Before
public void setup() throws Exception {
    contentMetadata.clear();//from w ww. j a  v  a 2s  . co m

    core.initGalley();

    final TransportManager transports = new TransportManagerImpl(
            new HttpClientTransport(new HttpImpl(new MemoryPasswordManager())));

    core.withTransportManager(transports);

    core.initMissingComponents();

    final HttproxConfig config = new HttproxConfig();
    config.setEnabled(true);

    proxyPort = config.getPort();

    final BootOptions bootOpts = new BootOptions();
    bootOpts.setBind(HOST);

    storeManager = new MemoryStoreDataManager(true);

    final IndyObjectMapper mapper = new IndyObjectMapper(true);

    final DefaultIndyConfiguration indyConfig = new DefaultIndyConfiguration();
    indyConfig.setNotFoundCacheTimeoutSeconds(1);
    final ExpiringMemoryNotFoundCache nfc = new ExpiringMemoryNotFoundCache(indyConfig);

    WeftExecutorService rescanService = new PoolWeftExecutorService("test-rescan-executor",
            (ThreadPoolExecutor) Executors.newCachedThreadPool(), 2, 10f, false, null, null);

    final DownloadManager downloadManager = new DefaultDownloadManager(storeManager, core.getTransferManager(),
            core.getLocationExpander(), new MockInstance<>(new MockContentAdvisor()), nfc, rescanService);

    WeftExecutorService contentAccessService = new PoolWeftExecutorService("test-content-access-executor",
            (ThreadPoolExecutor) Executors.newCachedThreadPool(), 2, 10f, false, null, null);
    DirectContentAccess dca = new DefaultDirectContentAccess(downloadManager, contentAccessService);

    ContentDigester contentDigester = new DefaultContentDigester(dca,
            new CacheHandle<>("content-metadata", contentMetadata));

    final ContentManager contentManager = new DefaultContentManager(storeManager, downloadManager, mapper,
            new SpecialPathManagerImpl(), new MemoryNotFoundCache(), contentDigester, Collections.emptySet());

    DataFileManager dfm = new DataFileManager(temp.newFolder(), new DataFileEventManager());
    final TemplatingEngine templates = new TemplatingEngine(new GStringTemplateEngine(), dfm);
    final ContentController contentController = new ContentController(storeManager, contentManager, templates,
            mapper, new MimeTyper());

    KeycloakConfig kcConfig = new KeycloakConfig();
    kcConfig.setEnabled(false);

    final KeycloakProxyAuthenticator auth = new KeycloakProxyAuthenticator(kcConfig, config);

    ScriptEngine scriptEngine = new ScriptEngine(dfm);

    proxy = new HttpProxy(config, bootOpts,
            new ProxyAcceptHandler(config, storeManager, contentController, auth, core.getCache(), scriptEngine,
                    new MDCManager(), null, null, new CacheProducer(null, cacheManager, null)));
    proxy.start();
}

From source file:com.android.email.Preferences.java

/**
 * @deprecated This has been moved to {@link com.android.mail.preferences.MailPrefs}, and is
 * only here for migration./*from   ww  w .  j  a va 2s.  c  o  m*/
 */
@Deprecated
public Set<String> getWhitelistedSenderAddresses() {
    try {
        return parseEmailSet(mSharedPreferences.getString(TRUSTED_SENDERS, ""));
    } catch (JSONException e) {
        return Collections.emptySet();
    }
}

From source file:mitm.application.djigzo.james.mailets.AbstractAddAdditionalCertificates.java

private Set<X509Certificate> validateCertificates(final Set<X509Certificate> certificates) {
    Set<X509Certificate> validated = null;

    try {//w ww . j  a v  a  2s  .c o  m
        validated = actionExecutor.executeTransaction(new DatabaseAction<Set<X509Certificate>>() {
            @Override
            public Set<X509Certificate> doAction(Session session) throws DatabaseException {
                Session previousSession = sessionManager.getSession();

                sessionManager.setSession(session);

                try {
                    return validateCertificatesTransacted(certificates);
                } finally {
                    sessionManager.setSession(previousSession);
                }
            }
        });
    } catch (DatabaseException e) {
        getLogger().error("Error validating certificates.", e);
    }

    if (validated == null) {
        validated = Collections.emptySet();
    }

    return validated;
}

From source file:edu.ksu.cis.indus.staticanalyses.concurrency.escape.AliasSet.java

/**
 * Creates a new instance of this class.
 *///from  w ww. j ava  2s . c o  m
private AliasSet() {
    fieldMap = new HashMap<String, AliasSet>();
    accessed = false;
    readyEntities = null;
    readThreads = new HashSet<Triple<InvokeStmt, SootMethod, SootClass>>();
    writeThreads = new HashSet<Triple<InvokeStmt, SootMethod, SootClass>>();
    readwriteEntities = null;
    writewriteEntities = null;
    sigsOfRWSharedFields = null;
    sigsOfWWSharedFields = null;
    lockEntities = null;
    intraThreadInterProcRefEntities = null;
    multiThreadAccessibility = false;
    readFields = Collections.emptySet();
    writtenFields = Collections.emptySet();
}