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

To view the source code for java.util Collections EMPTY_SET.

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Document

The empty set (immutable).

Usage

From source file:org.mule.module.management.support.SimplePasswordJmxAuthenticator.java

public Subject authenticate(Object authToken) {
    if (authToken == null) {
        throw new SecurityException("No authentication token available");
    }//from  ww  w.ja  v  a2s .  com
    if (!(authToken instanceof String[]) || ((String[]) authToken).length != 2) {
        throw new SecurityException("Unsupported credentials format");
    }

    String[] authentication = (String[]) authToken;

    String username = StringUtils.defaultString(authentication[0]);
    String password = StringUtils.defaultString(authentication[1]);

    if (!credentials.containsKey(username)) {
        throw new SecurityException("Unauthenticated user: " + username);
    }

    Object pass = credentials.get(username);
    if (!password.equals(pass == null ? "" : pass.toString())) {
        throw new SecurityException("Invalid password");
    }

    Set<Principal> principals = new HashSet<Principal>();
    principals.add(new JMXPrincipal(username));
    return new Subject(true, principals, Collections.EMPTY_SET, Collections.EMPTY_SET);
}

From source file:org.seasar.struts.bean.SuppressPropertyUtilsBean.java

/**
 * ?????????//from  www. j  av  a2  s  .  c o m
 * 
 * @param suppressedBeanClasses
 *            ????
 */
public SuppressPropertyUtilsBean(Collection suppressedBeanClasses) {
    if (suppressedBeanClasses == null) {
        this.suppressedBeanClasses = Collections.EMPTY_SET;
    } else {
        this.suppressedBeanClasses = Collections.unmodifiableSet(new HashSet(suppressedBeanClasses));
    }
    descriptorsCache = new FastHashMap();
    descriptorsCache.setFast(true);
}

From source file:org.mule.module.pubsubhubbub.data.DataStore.java

@SuppressWarnings("unchecked")
public Set<TopicSubscription> getTopicSubscriptions(final URI topicUrl) {
    final Set<TopicSubscription> result = new HashSet<TopicSubscription>();

    for (final TopicSubscription topicSubscription : (Set<TopicSubscription>) retrieve(topicUrl,
            TOPIC_SUBSCRIPTION_CALLBACKS_PARTITION, (Serializable) Collections.EMPTY_SET)) {
        if (topicSubscription.isExpired()) {
            removeTopicSubscription(topicSubscription);
        } else {/*from ww  w .ja  va  2  s.c o  m*/
            result.add(topicSubscription);
        }
    }

    return result;
}

From source file:org.apache.jackrabbit.core.util.EmptyLinkedMap.java

/**
 * Returns an unmodifiable empty set.
 *
 * @return an unmodifiable empty set.
 */
public Set keySet() {
    return Collections.EMPTY_SET;
}

From source file:hr.fer.zemris.vhdllab.service.workspace.WorkspaceTest.java

@SuppressWarnings("unchecked")
@Before//from   w  w w  .ja v  a 2  s.c o  m
public void initObject() {
    projectMetadata = new HashMap<Project, ProjectMetadata>(3);
    firstProject = new Project("userId", "project1");
    Hierarchy hierarchy = new Hierarchy(firstProject, new ArrayList<HierarchyNode>());
    projectMetadata.put(firstProject, new ProjectMetadata(hierarchy, Collections.EMPTY_SET));

    secondProject = new Project("userId", "project2");
    hierarchy = new Hierarchy(secondProject, new ArrayList<HierarchyNode>());
    projectMetadata.put(secondProject, new ProjectMetadata(hierarchy, Collections.EMPTY_SET));

    thirdProject = new Project("userId", "project3");
    projectMetadata.put(thirdProject, null);

    predefinedFiles = new HashSet<File>(1);
    predefinedFiles.add(new File("predefined", null, "data"));
    preferencesFiles = new ArrayList<PreferencesFile>(2);
    preferencesFiles.add(new PreferencesFile("preferences1", "data"));
    preferencesFiles.add(new PreferencesFile("preferences2", "data2"));
    workspace = new Workspace(projectMetadata, predefinedFiles, preferencesFiles);
}

From source file:org.eclipse.m2e.importer.tests.MavenImporterTest.java

@Test
public void test() throws Exception {
    Set<IProject> newProjects = null;
    SmartImportJob job = new SmartImportJob(projectDirectory, Collections.EMPTY_SET, true, true);

    Map<File, List<ProjectConfigurator>> proposals = job.getImportProposals(monitor);
    Assert.assertEquals("Expected 2 projects to import", 2, proposals.size()); //$NON-NLS-1$
    boolean thymConfiguratorFound = false;
    for (ProjectConfigurator configurator : proposals.values().iterator().next()) {
        if (configurator instanceof MavenProjectConfigurator) {
            thymConfiguratorFound = true;
        }// w  w w  . j  av a2  s .com
    }
    Assert.assertTrue("Maven configurator not found while checking directory", thymConfiguratorFound); //$NON-NLS-1$

    // accept proposals
    job.setDirectoriesToImport(proposals.keySet());

    IWorkspaceRoot wsRoot = ResourcesPlugin.getWorkspace().getRoot();
    Set<IProject> beforeImport = new HashSet<>(Arrays.asList(wsRoot.getProjects()));
    job.run(monitor);
    job.join();
    newProjects = new HashSet<>(Arrays.asList(wsRoot.getProjects()));
    newProjects.removeAll(beforeImport);
    Assert.assertEquals("Expected only 2 new projects", 2, newProjects.size()); //$NON-NLS-1$

    JobHelpers.waitForJobs(new IJobMatcher() {
        public boolean matches(Job job) {
            return MavenProjectConfigurator.UPDATE_MAVEN_CONFIGURATION_JOB_NAME.equals(job.getName());
        }
    }, 30_000);

    for (IProject project : newProjects) {
        Assert.assertTrue(project.getLocation().toFile().getCanonicalPath()
                .startsWith(projectDirectory.getCanonicalPath()));
        IMavenProjectFacade mavenProject = MavenPlugin.getMavenProjectRegistry().getProject(project);
        Assert.assertNotNull("Project not configured as Maven", mavenProject); //$NON-NLS-1$
    }
}

From source file:io.cfp.model.User.java

public Set<String> getRoles() {
    return roles != null ? roles : Collections.EMPTY_SET;
}

From source file:org.polymap.core.security.DummyAuthorizationModule.java

@Override
public Set<Principal> rolesOf(Subject subject) {
    Set<DummyUserPrincipal> dummyPrincipals = subject.getPrincipals(DummyUserPrincipal.class);
    assert dummyPrincipals.size() <= 1;

    // DummyUserPrincipal found
    if (!dummyPrincipals.isEmpty()) {
        return getOnlyElement(dummyPrincipals).getRoles();
    }//  www .j  ava 2s  .  co m
    //
    else {
        Set<UserPrincipal> users = subject.getPrincipals(UserPrincipal.class);
        assert users.size() == 1 : "Too many/less UserPrincipals in subject: " + users;
        DummyUserPrincipal dummyUser = delegateLoginModule.userForName(getOnlyElement(users).getName());
        return dummyUser != null ? dummyUser.getRoles() : Collections.EMPTY_SET;
    }
}

From source file:org.apache.flume.channel.file.Serialization.java

/**
 * Deletes all files in given directory.
 * @param checkpointDir - The directory whose files are to be deleted
 * @param excludes - Names of files which should not be deleted from this
 *                 directory./*from  ww w  . ja v a 2  s . co m*/
 * @return - true if all files were successfully deleted, false otherwise.
 */
static boolean deleteAllFiles(File checkpointDir, @Nullable Set<String> excludes) {
    if (!checkpointDir.isDirectory()) {
        return false;
    }

    File[] files = checkpointDir.listFiles();
    if (files == null) {
        return false;
    }
    StringBuilder builder;
    if (files.length == 0) {
        return true;
    } else {
        builder = new StringBuilder("Deleted the following files: ");
    }
    if (excludes == null) {
        excludes = Collections.EMPTY_SET;
    }
    for (File file : files) {
        if (excludes.contains(file.getName())) {
            LOG.info("Skipping " + file.getName() + " because it is in excludes " + "set");
            continue;
        }
        if (!FileUtils.deleteQuietly(file)) {
            LOG.info(builder.toString());
            LOG.error("Error while attempting to delete: " + file.getAbsolutePath());
            return false;
        }
        builder.append(", ").append(file.getName());
    }
    builder.append(".");
    LOG.info(builder.toString());
    return true;
}

From source file:org.onecmdb.core.internal.reference.ReferenceService.java

/**
 * Retrive all reference ci that are linked to the ci.
 */// ww  w .j a  v a 2s.  c  o  m
public Set<IReference> getReferrers(ICi ci) {
    if (this.daoReader == null) {
        log.fatal("No daoReader set on refrence service.");
        return (Collections.EMPTY_SET);
    }
    if (ci == null) {
        return (Collections.EMPTY_SET);
    }

    List<IAttribute> refs = daoReader.getTargetReference(ci);

    if (refs == null) {
        return (Collections.EMPTY_SET);
    }
    Set<IReference> references = new HashSet<IReference>();
    for (IAttribute refAttribute : refs) {
        ICi refCi = refAttribute.getOwner();
        if (isReferenceCi(refCi)) {
            references.add(new ReferenceItem(refCi));
        }
    }
    return (references);
}

Example usage for java.util Collections EMPTY_SET

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