Example usage for java.util Collections EMPTY

Introduction

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

Prototype

Set EMPTY_SET

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Document

The empty set (immutable).

Usage

From source file:org.springsource.ide.eclipse.boot.maven.analyzer.graph.DirectedGraph.java

@SuppressWarnings({ "rawtypes", "unchecked" })
public Collection<Object> getSuccessors(Object node) {
    Collection nodes = (Collection) dgraph.get(node);
    if (nodes != null) {
        return nodes;
    }//  ww  w  . jav  a 2s .c  o m
    return Collections.EMPTY_SET;
}

From source file:org.hyperledger.fabric.sdk.NetworkConfig.java

/**
 * Names of Orderers found/*  w ww . ja  va  2 s  . com*/
 *
 * @return Collection of peer names found.
 */
public Collection<String> getOrdererNames() {
    if (orderers == null) {
        return Collections.EMPTY_SET;
    } else {
        return new HashSet<>(orderers.keySet());
    }
}

From source file:org.codehaus.mojo.mrm.impl.maven.MemoryArtifactStore.java

/**
 * {@inheritDoc}/*  w w w.j  a v  a 2  s  .com*/
 */
public synchronized Set getVersions(String groupId, String artifactId) {
    Map artifactMap = (Map) contents.get(groupId);
    Map versionMap = (Map) (artifactMap == null ? null : artifactMap.get(artifactId));
    return new TreeSet(versionMap == null ? Collections.EMPTY_SET : versionMap.keySet());
}

From source file:org.jahia.test.services.content.interceptor.HtmlFilteringInterceptorTest.java

@Test
public void testFilteringDisabled() throws Exception {
    String source = "abc";
    assertEquals("Filtering should nor be done as the tag set is empty", source,
            HtmlFilteringInterceptor.filterTags(source, Collections.EMPTY_SET, false));
}

From source file:org.apache.camel.impl.DefaultPackageScanClassResolver.java

@SuppressWarnings("unchecked")
public Set<Class<?>> findAnnotated(Class<? extends Annotation> annotation, String... packageNames) {
    if (packageNames == null) {
        return Collections.EMPTY_SET;
    }/*w ww . j  a va 2 s.  c  o  m*/

    if (log.isDebugEnabled()) {
        log.debug("Searching for annotations of " + annotation.getName() + " in packages: "
                + Arrays.asList(packageNames));
    }

    PackageScanFilter test = getCompositeFilter(new AnnotatedWithPackageScanFilter(annotation, true));
    Set<Class<?>> classes = new LinkedHashSet<Class<?>>();
    for (String pkg : packageNames) {
        find(test, pkg, classes);
    }

    if (log.isDebugEnabled()) {
        log.debug("Found: " + classes);
    }

    return classes;
}

From source file:com.codecrate.shard.hibernate.BasicHibernateObjectDaoSupport.java

protected Collection searchObjects(String query) {
    FullTextSession fullTextSession = Search.createFullTextSession(getSession());
    try {//from ww w. j  a va  2s .  com
        final MultiFieldQueryParser parser = new MultiFieldQueryParser(getSearchableFieldNames(),
                getAnalyzer());
        org.apache.lucene.search.Query luceneQuery = parser.parse(query);
        FullTextQuery hibernateQuery = fullTextSession.createFullTextQuery(luceneQuery, getManagedClass());
        return hibernateQuery.list();
    } catch (ParseException e) {
        LOG.error("Error parsing query: " + query, e);
        return Collections.EMPTY_SET;
    }
}

From source file:com.espertech.esper.core.service.StatementResultServiceImpl.java

/**
 * Ctor.// w  w w .j  a v a  2 s .  c  o m
 * @param statementLifecycleSvc handles persistence for statements
 * @param metricReportingService for metrics reporting
 * @param threadingService for outbound threading
 */
public StatementResultServiceImpl(String statementName, StatementLifecycleSvc statementLifecycleSvc,
        MetricReportingServiceSPI metricReportingService, ThreadingService threadingService) {
    log.debug(".ctor");
    this.statementName = statementName;
    this.statementLifecycleSvc = statementLifecycleSvc;
    this.metricReportingService = metricReportingService;
    if (metricReportingService != null) {
        this.statementOutputHooks = metricReportingService.getStatementOutputHooks();
    } else {
        this.statementOutputHooks = Collections.EMPTY_SET;
    }
    this.threadingService = threadingService;
}

From source file:org.apache.jcs.auxiliary.remote.ZombieRemoteCacheService.java

/**
 * Does nothing.//  w ww .  j  a v  a 2 s . co  m
 * <p>
 * (non-Javadoc)
 * @see org.apache.jcs.auxiliary.remote.behavior.IRemoteCacheService#getGroupKeys(java.lang.String,
 *      java.lang.String)
 */
public Set getGroupKeys(String cacheName, String groupName) {
    return Collections.EMPTY_SET;
}

From source file:org.jsecurity.cache.ehcache.EhCache.java

public Set keys() {
    try {//from  w  w  w.jav a  2  s. c  o  m
        List keys = cache.getKeys();
        if (keys != null && !keys.isEmpty()) {
            return Collections.unmodifiableSet(new LinkedHashSet(keys));
        } else {
            return Collections.EMPTY_SET;
        }
    } catch (Throwable t) {
        throw new CacheException(t);
    }
}

From source file:org.mskcc.cbio.importer.dao.internal.ImportDataRecordHibernateDAO.java

/**
 * Functon to retrieve all ImportDataRecord.
*
* @return Collection<ImportDataRecord>
 *//*from  w  ww  . ja  v  a  2s .  co m*/
@Override
@Transactional(propagation = Propagation.REQUIRED)
public Collection<ImportDataRecord> getImportDataRecords() {

    Session session = getSession();
    Query query = session.getNamedQuery("org.mskcc.cbio.import.model.importDataRecordAll");
    List<ImportDataRecord> toReturn = query.list();
    return (toReturn.size() > 0) ? new ArrayList<ImportDataRecord>(toReturn) : Collections.EMPTY_SET;
}

Example usage for java.util Collections EMPTY_SET

Introduction

Prototype

Document

Usage