Example usage for java.util Collections 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.hortonworks.streamline.streams.runtime.splitjoin.SplitJoinTest.java

@Test
public void testSplitJoinProcessorsWithActionsHavingStreams() throws Exception {
    String[] outputStreams = { "stream-1", "stream-2", "stream-3" };

    final SplitAction splitAction = new SplitAction();
    splitAction.setOutputStreams(Sets.newHashSet(outputStreams));
    final JoinAction joinAction = new JoinAction();
    joinAction.setOutputStreams(Collections.singleton("output-stream"));

    runSplitJoin(splitAction, joinAction);
}

From source file:com.cloudmine.api.db.BaseLocallySavableCMObject.java

@Expand(isStatic = true)
public static CloudMineRequest loadObject(Context context, String objectId, @Optional CMSessionToken token,
        @Optional CMApiCredentials apiCredentials, @Optional CMServerFunction serverFunction,
        @Optional Response.Listener<CMObjectResponse> listener,
        @Optional Response.ErrorListener errorListener) {
    return loadObjects(context, Collections.singleton(objectId), token, apiCredentials, serverFunction,
            listener, errorListener);/*from w w  w. j a v  a2 s.  co m*/
}

From source file:com.griddynamics.jagger.engine.e1.reporting.MetricPlotsReporter.java

@Override
public JRDataSource getDataSource(String testId) {
    if (plots == null) {
        plots = createTaskPlots();//  w  w  w  .  ja  va 2  s. co  m
    }
    return new JRBeanCollectionDataSource(Collections.singleton(plots.get(testId)));
}

From source file:org.wallride.autoconfigure.WebGuestComponentScanRegistrar.java

private Set<String> getPackagesToScan(AnnotationMetadata metadata) {
    AnnotationAttributes attributes = AnnotationAttributes
            .fromMap(metadata.getAnnotationAttributes(WebGuestComponentScan.class.getName()));
    String[] value = attributes.getStringArray("value");
    String[] basePackages = attributes.getStringArray("basePackages");
    Class<?>[] basePackageClasses = attributes.getClassArray("basePackageClasses");
    if (!ObjectUtils.isEmpty(value)) {
        Assert.state(ObjectUtils.isEmpty(basePackages),
                "@WebGuestComponentScan basePackages and value attributes are mutually exclusive");
    }//from  www  . ja  va 2 s . c o  m
    Set<String> packagesToScan = new LinkedHashSet<String>();
    packagesToScan.addAll(Arrays.asList(value));
    packagesToScan.addAll(Arrays.asList(basePackages));
    for (Class<?> basePackageClass : basePackageClasses) {
        packagesToScan.add(ClassUtils.getPackageName(basePackageClass));
    }
    if (packagesToScan.isEmpty()) {
        return Collections.singleton(ClassUtils.getPackageName(metadata.getClassName()));
    }
    return packagesToScan;
}

From source file:io.pivotal.strepsirrhini.chaoslemur.infrastructure.InfrastructureConfiguration.java

@Bean
@ConditionalOnProperty("openstack.endpoint")
NovaApi novaApi(@Value("${openstack.endpoint}") String endpoint, @Value("${openstack.tenant}") String tenant,
        @Value("${openstack.username}") String username, @Value("${openstack.password}") String password) {

    String identity = String.format("%s:%s", tenant, username);

    // see https://issues.apache.org/jira/browse/JCLOUDS-816
    Properties overrides = new Properties();
    overrides.put(Constants.PROPERTY_TRUST_ALL_CERTS, "true");
    overrides.put(Constants.PROPERTY_RELAX_HOSTNAME, "true");

    return ContextBuilder.newBuilder("openstack-nova").endpoint(endpoint).credentials(identity, password)
            .modules(Collections.singleton(new SLF4JLoggingModule())).overrides(overrides)
            .buildApi(NovaApi.class);
}

From source file:com.phoenixst.plexus.algorithms.DepthFirstTreeView.java

public Collection rootNodes() {
    return Collections.singleton(startNode);
}

From source file:de.hybris.platform.catalog.jalo.synchronization.ItemCopyCreatorServiceLayerTest.java

private <T extends ItemModel> T createCreateConstraint(final String pattern) {
    final PatternConstraintModel constraint = modelService.create(PatternConstraintModel.class);
    constraint.setId("failOnCreate");
    constraint.setDescriptor(typeService.getAttributeDescriptor(ProductModel._TYPECODE, ProductModel.CODE));
    constraint.setType(typeService.getComposedTypeForClass(ProductModel.class));
    constraint.setRegexp(pattern);//from www . j  a  va  2 s .c  om
    constraint.setFlags(Collections.singleton(RegexpFlag.DOTALL));

    return (T) constraint;
}

From source file:org.commonjava.aprox.depgraph.rest.ResolverController.java

public String resolveGraph(final String from, final String groupId, final String artifactId,
        final String version, final boolean recurse, final String workspaceId,
        final Map<String, String[]> params) throws AproxWorkflowException {
    URI source;/*from   w w  w.  j  a  v  a  2  s .  c o  m*/
    try {
        source = sourceManager.createSourceURI(from);
    } catch (final CartoDataException e) {
        throw new AproxWorkflowException("Invalid source specification: {}. Reason: {}", e, from,
                e.getMessage());
    }

    if (source == null) {
        final String message = String.format("Invalid source format: '%s'. Use the form: '%s' instead.", from,
                sourceManager.getFormatHint());
        logger.warn(message);
        throw new AproxWorkflowException(ApplicationStatus.BAD_REQUEST.code(), message);
    }

    final ProjectVersionRef ref = new ProjectVersionRef(groupId, artifactId, version);
    final AggregationOptions options = createAggregationOptions(params, source);

    Set<ProjectVersionRef> resolved;
    ViewParams resolvedParams = null;
    try {
        resolvedParams = ops.resolve(workspaceId, options, ref);
        resolved = resolvedParams.getRoots();
        if (resolved == null || resolved.isEmpty()) {
            resolved = Collections.singleton(ref);
        }

        return serializer.writeValueAsString(Collections.singletonMap("resolvedTopLevelGAVs", resolved));
    } catch (final CartoDataException e) {
        throw new AproxWorkflowException("Failed to resolve graph: {} from: {}. Reason: {}", e, ref, from,
                e.getMessage());
    } catch (final JsonProcessingException e) {
        throw new AproxWorkflowException("Failed to serialize to JSON: %s", e, e.getMessage());
    }
}

From source file:com.devicehive.service.NetworkService.java

@Transactional(propagation = Propagation.NOT_SUPPORTED)
public NetworkWithUsersAndDevicesVO getWithDevicesAndDeviceClasses(@NotNull Long networkId,
        @NotNull HiveAuthentication hiveAuthentication) {
    HivePrincipal principal = (HivePrincipal) hiveAuthentication.getPrincipal();

    Set<Long> permittedNetworks = principal.getNetworkIds();
    Set<String> permittedDevices = principal.getDeviceGuids();

    Optional<NetworkWithUsersAndDevicesVO> result = of(principal).flatMap(pr -> {
        if (pr.getUser() != null)
            return of(pr.getUser());
        else//from w  w w .ja  v  a 2  s  . co  m
            return empty();
    }).flatMap(user -> {
        Long idForFiltering = user.isAdmin() ? null : user.getId();
        List<NetworkWithUsersAndDevicesVO> found = networkDao.getNetworksByIdsAndUsers(idForFiltering,
                Collections.singleton(networkId), permittedNetworks);
        return found.stream().findFirst();
    }).map(network -> {
        //fixme - important, restore functionality once permission evaluator is switched to jwt
        /*if (principal.getKey() != null) {
            Set<AccessKeyPermissionVO> permissions = principal.getKey().getPermissions();
            Set<AccessKeyPermissionVO> filtered = CheckPermissionsHelper
                    .filterPermissions(principal.getKey(), permissions, AccessKeyAction.GET_DEVICE,
                            details.getClientInetAddress(), details.getOrigin());
            if (filtered.isEmpty()) {
                network.setDevices(Collections.emptySet());
            }
        }*/
        if (permittedDevices != null && !permittedDevices.isEmpty()) {
            Set<DeviceVO> allowed = network.getDevices().stream()
                    .filter(device -> permittedDevices.contains(device.getGuid())).collect(Collectors.toSet());
            network.setDevices(allowed);
        }
        return network;
    });

    return result.orElse(null);
}

From source file:com._4dconcept.springframework.data.marklogic.repository.config.MarklogicRepositoryConfigurationExtension.java

@Override
protected Collection<Class<? extends Annotation>> getIdentifyingAnnotations() {
    return Collections.singleton(Document.class);
}