Example usage for java.util Collections singleton

List of usage examples for java.util Collections singleton

  1. HOME
  2. Java
  3. java
  4. java.util.*
  5. Collections
  6. singleton

Introduction

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

Prototype

public static <T> Set<T> singleton(T o)

Source Link

Document

Returns an immutable set containing only the specified object.

Usage

From source file:com.dangdang.ddframe.rdb.common.sql.base.AbstractSQLTest.java

private static BasicDataSource buildDataSource(final String dbName, final DatabaseType type) {
    DataBaseEnvironment dbEnv = new DataBaseEnvironment(type);
    BasicDataSource result = new BasicDataSource();
    result.setDriverClassName(dbEnv.getDriverClassName());
    result.setUrl(dbEnv.getURL(dbName));
    result.setUsername(dbEnv.getUsername());
    result.setPassword(dbEnv.getPassword());
    result.setMaxActive(1000);//  w ww .j  a v a2s .  c  o  m
    if (DatabaseType.Oracle == dbEnv.getDatabaseType()) {
        result.setConnectionInitSqls(Collections.singleton("ALTER SESSION SET CURRENT_SCHEMA = " + dbName));
    }
    return result;
}

From source file:com.codecrate.shard.transfer.pcgen.PcgenDatasetImporter.java

private Collection<File> findDatasets(File root) {
    if (isDataset(root)) {
        return Collections.singleton(root);
    }/*from   w  w  w.j  a v  a 2  s .  com*/

    Collection<File> results = new TreeSet<File>();
    File[] files = root.listFiles();
    if (null != files) {
        for (int i = 0; i < files.length; i++) {
            File child = files[i];
            if (child.isDirectory()) {
                results.addAll(findDatasets(child));
            }
        }
    }
    return results;
}

From source file:ch.cyberduck.core.irods.IRODSReadFeatureTest.java

@Test(expected = NotfoundException.class)
public void testReadNotFound() throws Exception {
    final ProtocolFactory factory = new ProtocolFactory(
            new HashSet<>(Collections.singleton(new IRODSProtocol())));
    final Profile profile = new ProfilePlistReader(factory)
            .read(new Local("../profiles/iRODS (iPlant Collaborative).cyberduckprofile"));
    final Host host = new Host(profile, profile.getDefaultHostname(),
            new Credentials(System.getProperties().getProperty("irods.key"),
                    System.getProperties().getProperty("irods.secret")));

    final IRODSSession session = new IRODSSession(host);
    session.open(new DisabledHostKeyCallback());
    session.login(new DisabledPasswordStore(), new DisabledLoginCallback(), new DisabledCancelCallback());

    final Path test = new Path(new IRODSHomeFinderService(session).find(), UUID.randomUUID().toString(),
            EnumSet.of(Path.Type.file));
    assertFalse(session.getFeature(Find.class).find(test));

    new IRODSReadFeature(session).read(test, new TransferStatus(), new DisabledConnectionCallback());
}

From source file:com.yahoo.elide.jsonapi.JsonApiTest.java

@Test
public void writeSingleIncluded() throws JsonProcessingException {
    Parent parent = new Parent();
    Child child = new Child();
    parent.setId(123L);//w  ww .j a  va2  s .  c  o  m
    child.setId(2);
    parent.setFirstName("bob");
    parent.setChildren(Collections.singleton(child));
    child.setParents(Collections.singleton(parent));
    child.setFriends(new HashSet<>());

    PersistentResource<Parent> pRec = new PersistentResource<>(parent, userScope);

    JsonApiDocument jsonApiDocument = new JsonApiDocument();
    jsonApiDocument.setData(new Data<>(pRec.toResource()));
    jsonApiDocument.addIncluded(new PersistentResource<>(pRec, child, userScope).toResource());

    String expected = "{\"data\":{\"type\":\"parent\",\"id\":\"123\",\"attributes\":{\"firstName\":\"bob\"},\"relationships\":{\"children\":{\"data\":[{\"type\":\"child\",\"id\":\"2\"}]},\"spouses\":{\"data\":[]}}},\"included\":[{\"type\":\"child\",\"id\":\"2\",\"attributes\":{\"name\":null},\"relationships\":{\"friends\":{\"data\":[]},\"parents\":{\"data\":[{\"type\":\"parent\",\"id\":\"123\"}]}}}]}";

    String doc = mapper.writeJsonApiDocument(jsonApiDocument);
    assertEquals(doc, expected);
}

From source file:org.apache.ambari.server.controller.metrics.timeline.AMSReportPropertyProviderTest.java

@Test
public void testPopulateResources() throws Exception {
    TestStreamProvider streamProvider = new TestStreamProvider(SINGLE_HOST_METRICS_FILE_PATH);
    injectCacheEntryFactoryWithStreamProvider(streamProvider);
    TestMetricHostProvider metricHostProvider = new TestMetricHostProvider();
    ComponentSSLConfiguration sslConfiguration = mock(ComponentSSLConfiguration.class);

    Map<String, Map<String, PropertyInfo>> propertyIds = PropertyHelper
            .getMetricPropertyIds(Resource.Type.Cluster);

    AMSReportPropertyProvider propertyProvider = new AMSReportPropertyProvider(propertyIds, streamProvider,
            sslConfiguration, cacheProvider, metricHostProvider, CLUSTER_NAME_PROPERTY_ID);

    String propertyId = PropertyHelper.getPropertyId("metrics/cpu", "User");
    Resource resource = new ResourceImpl(Resource.Type.Cluster);
    resource.setProperty(CLUSTER_NAME_PROPERTY_ID, "c1");
    Map<String, TemporalInfo> temporalInfoMap = new HashMap<String, TemporalInfo>();
    temporalInfoMap.put(propertyId, new TemporalInfoImpl(1416445244800L, 1416448936474L, 1L));
    Request request = PropertyHelper.getReadRequest(Collections.singleton(propertyId), temporalInfoMap);
    Set<Resource> resources = propertyProvider.populateResources(Collections.singleton(resource), request,
            null);//from w  w  w  .j  a v a  2s. c  o  m
    Assert.assertEquals(1, resources.size());
    Resource res = resources.iterator().next();
    Map<String, Object> properties = PropertyHelper.getProperties(resources.iterator().next());
    Assert.assertNotNull(properties);
    URIBuilder uriBuilder = AMSPropertyProvider.getAMSUriBuilder("localhost", 6188, false);
    uriBuilder.addParameter("metricNames", "cpu_user");
    uriBuilder.addParameter("appId", "HOST");
    uriBuilder.addParameter("startTime", "1416445244800");
    uriBuilder.addParameter("endTime", "1416448936474");
    Assert.assertEquals(uriBuilder.toString(), streamProvider.getLastSpec());
    Number[][] val = (Number[][]) res.getPropertyValue("metrics/cpu/User");
    Assert.assertEquals(111, val.length);
}

From source file:com.thomasjensen.sercoll.SerializableUnmodifiableHashMapUTest.java

@Test
public void testUnsupportedOps() {
    final SerializableMap<String, String> mapUnderTest = buildNewTestMap();

    try {//from  ww  w  .  j  a va 2s  .  c o m
        mapUnderTest.clear();
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        mapUnderTest.put("D", "value");
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        mapUnderTest.putAll(new HashMap<String, String>());
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        mapUnderTest.remove("A");
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        mapUnderTest.keySet().remove("B");
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        mapUnderTest.keySet().add("E");
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        mapUnderTest.keySet().clear();
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        mapUnderTest.keySet().removeAll(Collections.singleton("A"));
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        mapUnderTest.keySet().addAll(Arrays.asList("E", "F"));
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        mapUnderTest.keySet().retainAll(Collections.singleton("A"));
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        mapUnderTest.values().remove("B");
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    Map.Entry<String, String> entry1 = mapUnderTest.entrySet().iterator().next();
    Assert.assertNotNull(entry1);
    try {
        mapUnderTest.entrySet().remove(entry1);
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        entry1.setValue("poison");
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        mapUnderTest.entrySet().clear();
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }

    try {
        Iterator<Entry<String, String>> iter = mapUnderTest.entrySet().iterator();
        Assert.assertNotNull(iter.next());
        iter.remove();
        Assert.fail("expected exception was not thrown");
    } catch (UnsupportedOperationException e) {
        // expected
    }
}

From source file:com.mirth.connect.server.api.servlets.ChannelStatusServlet.java

@Override
@CheckAuthorizedChannelId/*from   w w  w  .  ja  v a 2 s  .c  o m*/
public void stopChannel(String channelId, boolean returnErrors) {
    ErrorTaskHandler handler = new ErrorTaskHandler();
    engineController.stopChannels(Collections.singleton(channelId), handler);
    if (returnErrors && handler.isErrored()) {
        throw new MirthApiException(handler.getError());
    }
}

From source file:org.hupo.psi.mi.psicquic.ws.IndexBasedPsicquicService.java

private String createQuery(String fieldName, DbRef dbRef) {
    return createQuery(fieldName, Collections.singleton(dbRef), null);
}

From source file:com.evolveum.midpoint.web.page.admin.server.PageTaskController.java

public void deleteSyncTokenPerformed(AjaxRequestTarget target) {
    LOGGER.debug("Deleting sync token.");
    OperationResult result = new OperationResult(PageTaskEdit.OPERATION_DELETE_SYNC_TOKEN);

    Task operationTask = parentPage.createSimpleTask(PageTaskEdit.OPERATION_DELETE_SYNC_TOKEN);
    try {/*w ww.j  a v  a  2 s  .c  om*/
        final TaskDto taskDto = parentPage.getTaskDto();
        final PrismProperty property = taskDto.getExtensionProperty(SchemaConstants.SYNC_TOKEN);
        if (property == null) {
            result.recordWarning("Token is not present in this task."); // should be treated by isVisible
        } else {
            final ObjectDelta<? extends ObjectType> delta = (ObjectDelta<? extends ObjectType>) DeltaBuilder
                    .deltaFor(TaskType.class, parentPage.getPrismContext())
                    .item(new ItemPath(TaskType.F_EXTENSION, SchemaConstants.SYNC_TOKEN),
                            property.getDefinition())
                    .replace().asObjectDelta(parentPage.getTaskDto().getOid());
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("Deleting sync token:\n{}", delta.debugDump());
            }
            parentPage.getModelService().executeChanges(Collections.singleton(delta), null, operationTask,
                    result);
            result.recomputeStatus();
        }
    } catch (Exception ex) {
        result.recomputeStatus();
        result.recordFatalError("Couldn't delete sync token from the task.", ex);
        LoggingUtils.logUnexpectedException(LOGGER, "Couldn't delete sync token from the task.", ex);
    }
    afterStateChangingOperation(target, result);
}