Example usage for java.util Collections emptySet

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:de.tudarmstadt.ukp.dkpro.lexsemresource.wikipedia.WikipediaArticleResource.java

public Set<Entity> getParents(Entity entity) throws LexicalSemanticResourceException {
    if (!this.containsEntity(entity)) {
        return Collections.emptySet();
    }//from www. j  a va  2s.  co  m
    Page p = WikipediaArticleUtils.entityToPage(wiki, entity, isCaseSensitive);
    return WikipediaArticleUtils.pagesToEntities(wiki, p.getInlinks(), isCaseSensitive);
}

From source file:ai.grakn.graql.internal.analytics.MedianVertexProgram.java

@Override
public Set<MessageScope> getMessageScopes(final Memory memory) {
    switch (memory.getIteration()) {
    case 0:/*from  w w  w. j  a  v a 2  s.co  m*/
        return Collections.singleton(messageScopeShortcutIn);
    case 1:
        return Collections.singleton(messageScopeShortcutOut);
    default:
        return Collections.emptySet();
    }
}

From source file:com.ge.predix.test.utils.PolicyHelper.java

public PolicyEvaluationRequestV1 createRandomEvalRequest() {
    Random r = new Random(System.currentTimeMillis());
    Set<Attribute> subjectAttributes = Collections.emptySet();
    return this.createEvalRequest(ACTIONS[r.nextInt(4)], String.valueOf(r.nextLong()),
            "/alarms/sites/" + String.valueOf(r.nextLong()), subjectAttributes);
}

From source file:com.wms.studio.cache.lock.SyncLockMapCache.java

@Override
public Set<K> keys() {
    try {/*from   w  ww.  j  ava  2 s . c  om*/
        HashMap<K, V> attributes = memcachedClient.get(name);
        if (attributes != null) {
            Set<K> keys = attributes.keySet();
            if (!keys.isEmpty())
                return Collections.unmodifiableSet(keys);
        }
    } catch (Exception e) {
        log.fatal("?MemCache,.", e);
    }
    return Collections.emptySet();
}

From source file:com.ge.predix.acs.service.policy.evaluation.PolicyEvaluationWithAttributeUriTemplateTest.java

@Test
public void testEvaluateWithURIAttributeTemplate()
        throws JsonParseException, JsonMappingException, IOException {
    MockitoAnnotations.initMocks(this);
    Whitebox.setInternalState(this.policyMatcher, "attributeReaderFactory", this.attributeReaderFactory);
    Whitebox.setInternalState(this.evaluationService, "policyMatcher", this.policyMatcher);
    when(this.zoneResolver.getZoneEntityOrFail()).thenReturn(new ZoneEntity(0L, "testzone"));
    when(this.cache.get(any(PolicyEvaluationRequestCacheKey.class))).thenReturn(null);
    when(this.attributeReaderFactory.getResourceAttributeReader())
            .thenReturn(this.defaultResourceAttributeReader);
    when(this.attributeReaderFactory.getSubjectAttributeReader())
            .thenReturn(this.defaultSubjectAttributeReader);

    // set policy
    PolicySet policySet = new ObjectMapper().readValue(
            new File("src/test/resources/policy-set-with-attribute-uri-template.json"), PolicySet.class);
    when(this.policyService.getAllPolicySets()).thenReturn(Arrays.asList(policySet));

    // Create 'role' attribute in resource for URI /site/1234. Used in target match for policy 1.
    BaseResource testResource = new BaseResource("/site/1234");
    Set<Attribute> resourceAttributes = new HashSet<>();
    resourceAttributes.add(new Attribute("https://acs.attributes.int", "role", "admin"));
    testResource.setAttributes(resourceAttributes);

    when(this.defaultResourceAttributeReader.getAttributes(testResource.getResourceIdentifier()))
            .thenReturn(testResource.getAttributes());

    BaseSubject testSubject = new BaseSubject("test-subject");
    testSubject.setAttributes(Collections.emptySet());
    when(this.defaultSubjectAttributeReader.getAttributesByScope(anyString(), anySetOf(Attribute.class)))
            .thenReturn(testSubject.getAttributes());

    // resourceURI matches attributeURITemplate
    PolicyEvaluationResult evalResult = this.evaluationService
            .evalPolicy(createRequest("/v1/site/1234/asset/456", "test-subject", "GET"));
    Assert.assertEquals(evalResult.getEffect(), Effect.PERMIT);

    // resourceURI does NOT match attributeURITemplate
    evalResult = this.evaluationService
            .evalPolicy(createRequest("/v1/no-match/asset/123", "test-subject", "GET"));
    // second policy will match.
    Assert.assertEquals(evalResult.getEffect(), Effect.DENY);

}

From source file:com.tesora.dve.mysqlapi.repl.MyReplicationSlaveConfig.java

public Set<String> getIgnoreTableList() {
    if (configFile == null)
        return Collections.emptySet();

    if (ignoreTableList != null)
        return ignoreTableList;

    ignoreTableList = new HashSet<String>(Arrays.asList(configProps.getStringArray(REPL_IGNORE_TABLE_KEY)));

    return ignoreTableList;
}

From source file:cop.raml.utils.Utils.java

/**
 * Convert enum constants in given {@code arr} to no duplication constant collection.
 *
 * @param arr array of enum items//from w  ww. j  a  v  a  2 s  . c  o  m
 * @return {@code null} or not empty enum item set
 */
@NotNull
public static Set<String> asSet(String... arr) {
    if (ArrayUtils.isEmpty(arr))
        return Collections.emptySet();

    return Arrays.stream(arr).filter(StringUtils::isNotBlank).map(String::trim)
            .collect(toCollection(LinkedHashSet::new));
}

From source file:cop.raml.utils.UtilsTest.java

@Test
public void testGetParams() {
    assertThat(Utils.getParams(null)).isSameAs(Collections.emptySet());
    assertThat(Utils.getParams("")).isSameAs(Collections.emptySet());
    assertThat(Utils.getParams("   ")).isSameAs(Collections.emptySet());
    assertThat(Utils.getParams("simple string")).isSameAs(Collections.emptySet());
    assertThat(Utils.getParams("/project/{projectId}/order/{orderId}/validation")).containsExactly("projectId",
            "orderId");
}

From source file:de.tudarmstadt.ukp.dkpro.core.io.text.TokenizedTextWriter.java

@Override
public void initialize(UimaContext context) throws ResourceInitializationException {
    super.initialize(context);
    getLogger().info("Writing to file " + getTargetLocation());
    try {//from   w  ww.  j  a  v a  2  s  .co m
        targetWriter = new BufferedWriter(
                new OutputStreamWriter(new FileOutputStream(getTargetLocation()), targetEncoding));
        stopwords = stopwordsFile == null ? Collections.emptySet() : readStopwordsFile(stopwordsFile);
    } catch (IOException e) {
        throw new ResourceInitializationException(e);
    }
}

From source file:edu.toronto.cs.phenotips.measurements.MeasurementsScriptService.java

/**
 * Get the names of all the measurements handlers.
 * //from w ww  .  ja  v a  2s .co  m
 * @return a set with the names of all the measurement handlers, or an empty set if there was a problem retrieving
 *         the actual values
 */
public Set<String> getAvailableMeasurementNames() {
    try {
        Map<String, MeasurementHandler> handlers = this.componentManager.get()
                .getInstanceMap(MeasurementHandler.class);
        if (handlers != null) {
            Set<String> result = new TreeSet<String>(MeasurementNameSorter.instance);
            result.addAll(handlers.keySet());
            return result;
        }
    } catch (ComponentLookupException ex) {
        this.logger.warn("Failed to list available measurement types", ex);
    }
    return Collections.emptySet();
}