List of usage examples for com.google.common.collect Iterables getOnlyElement
@Nullable public static <T> T getOnlyElement(Iterable<? extends T> iterable, @Nullable T defaultValue)
From source file:com.cinchapi.concourse.importer.JsonImporter.java
/** * Given a string of JSON data, upsert it into Concourse. * //from www. java 2 s. c o m * @param json * @return the records that were affected by the import */ protected Set<Long> upsertJsonString(String json) { // TODO call concourse.upsert(json) when method is ready // NOTE: The following implementation is very inefficient, but will // suffice until the upsert functionality is available Set<Long> records = Sets.newHashSet(); for (Multimap<String, Object> data : Convert.anyJsonToJava(json)) { Long record = MoreObjects.firstNonNull( (Long) Iterables.getOnlyElement(data.get(Constants.JSON_RESERVED_IDENTIFIER_NAME), null), Time.now()); data.removeAll(Constants.JSON_RESERVED_IDENTIFIER_NAME); for (String key : data.keySet()) { for (Object value : data.get(key)) { concourse.add(key, value, record); } } records.add(record); } return records; }
From source file:ratpack.configuration.internal.DefaultConfigurationFactoryFactory.java
@Override public ConfigurationFactory build(ConfigurationSource configurationSource) throws ConfigurationException { TypeCoercingProperties props = LaunchConfigsInternal.consolidatePropertiesFromGlobalProperties( StandardSystemProperty.USER_DIR.value(), classLoader, configurationSource.getOverrideProperties(), configurationSource.getDefaultProperties()); try {/* www . java2s . co m*/ Class<ConfigurationFactory> configurationFactoryClass = props.asClass(CONFIGURATION_FACTORY, ConfigurationFactory.class); if (configurationFactoryClass != null) { return configurationFactoryClass.newInstance(); } } catch (ReflectiveOperationException ex) { throw new ConfigurationException("Could not instantiate specified configuration factory class " + props.asString(CONFIGURATION_FACTORY, null), ex); } ServiceLoader<ConfigurationFactory> serviceLoader = ServiceLoader.load(ConfigurationFactory.class, classLoader); try { return Iterables.getOnlyElement(serviceLoader, new DefaultConfigurationFactory()); } catch (IllegalArgumentException ex) { throw new ConfigurationException( "Multiple possible configuration factories were found; please specify one with the '" + CONFIGURATION_FACTORY + "' property", ex); } }
From source file:org.janusgraph.graphdb.types.vertices.RelationTypeVertex.java
public InternalRelationType getBaseType() { Entry entry = Iterables.getOnlyElement(getRelated(TypeDefinitionCategory.RELATIONTYPE_INDEX, Direction.IN), null);// w ww .jav a2 s . co m if (entry == null) return null; assert entry.getSchemaType() instanceof InternalRelationType; return (InternalRelationType) entry.getSchemaType(); }
From source file:org.summer.dsl.xannotation.typesystem.XbaseWithAnnotationsTypeComputer.java
protected void _computeTypes(XAnnotation object, ITypeComputationState state) { JvmType annotationType = object.getAnnotationType(); if (annotationType != null && !annotationType.eIsProxy()) { if (annotationType instanceof JvmAnnotationType) { XExpression expression = object.getValue(); if (expression != null) { Iterable<JvmFeature> iterable = ((JvmAnnotationType) annotationType) .findAllFeaturesByName("value"); JvmFeature value = Iterables.getOnlyElement(iterable, null); if (value != null) { if (value instanceof JvmOperation) { computeTypes(object, (JvmOperation) value, expression, state); } else { throw new IllegalStateException("Unexpected feature type " + value); }/*from ww w . j a v a2 s . c o m*/ } else { state.addDiagnostic( new EObjectDiagnosticImpl(Severity.ERROR, IssueCodes.ANNOTATIONS_NO_VALUE_ATTRIBUTE, "The attribute value is undefined for the annotation type " + annotationType.getSimpleName(), object, XannotationPackage.Literals.XANNOTATION__VALUE, -1, null)); state.withNonVoidExpectation().computeTypes(expression); } } else { List<XAnnotationElementValuePair> valuePairs = object.getElementValuePairs(); for (XAnnotationElementValuePair pair : valuePairs) { computeTypes(object, pair.getElement(), pair.getValue(), state); } } } else { state.addDiagnostic(new EObjectDiagnosticImpl(Severity.ERROR, IssueCodes.INCOMPATIBLE_TYPES, String.format("Type mismatch: cannot convert from %s to Annotation", annotationType.getSimpleName()), object, XannotationPackage.Literals.XANNOTATION__ANNOTATION_TYPE, -1, null)); computeChildTypesForUnknownAnnotation(object, state); } state.acceptActualType(new ParameterizedTypeReference(state.getReferenceOwner(), annotationType)); } else { computeChildTypesForUnknownAnnotation(object, state); } }
From source file:com.twitter.aurora.scheduler.http.StructDump.java
/** * Dumps a task struct./*from w w w. ja va 2 s. c om*/ * * @return HTTP response. */ @GET @Path("/task/{task}") @Produces(MediaType.TEXT_HTML) public Response dumpJob(@PathParam("task") final String taskId) { return dumpEntity("Task " + taskId, new Work.Quiet<Optional<? extends TBase<?, ?>>>() { @Override public Optional<? extends TBase<?, ?>> apply(StoreProvider storeProvider) { // Deep copy the struct to sidestep any subclass trickery inside the storage system. return Optional.fromNullable(Iterables .getOnlyElement(storeProvider.getTaskStore().fetchTasks(Query.taskScoped(taskId)), null) .newBuilder()); } }); }
From source file:org.obiba.opal.core.service.OpalGeneralConfigServiceImpl.java
@Nullable private ODocument getDocument(ODatabaseDocument db) { String className = OpalGeneralConfig.class.getSimpleName(); if (db.getMetadata().getSchema().getClass(className) == null) { return null; }/*from w w w. j a v a2 s.co m*/ return Iterables.getOnlyElement(db.browseClass(className), null); }
From source file:org.eclipse.xtext.xbase.annotations.typesystem.XbaseWithAnnotationsTypeComputer.java
protected void _computeTypes(XAnnotation object, ITypeComputationState state) { JvmType annotationType = object.getAnnotationType(); if (annotationType != null && !annotationType.eIsProxy()) { if (annotationType instanceof JvmAnnotationType) { XExpression expression = object.getValue(); if (expression != null) { Iterable<JvmFeature> iterable = ((JvmAnnotationType) annotationType) .findAllFeaturesByName("value"); JvmFeature value = Iterables.getOnlyElement(iterable, null); if (value != null) { if (value instanceof JvmOperation) { computeTypes(object, (JvmOperation) value, expression, state); } else { throw new IllegalStateException("Unexpected feature type " + value); }/* w w w . j a v a2 s . com*/ } else { state.addDiagnostic( new EObjectDiagnosticImpl(Severity.ERROR, IssueCodes.ANNOTATIONS_NO_VALUE_ATTRIBUTE, "The attribute value is undefined for the annotation type " + annotationType.getSimpleName(), object, XAnnotationsPackage.Literals.XANNOTATION__VALUE, -1, null)); state.withNonVoidExpectation().computeTypes(expression); } } else { List<XAnnotationElementValuePair> valuePairs = object.getElementValuePairs(); if (valuePairs.isEmpty()) { Iterable<JvmFeature> iterable = ((JvmAnnotationType) annotationType) .findAllFeaturesByName("value"); JvmFeature value = Iterables.getOnlyElement(iterable, null); if (value != null) { if (value instanceof JvmOperation) { computeTypes(object, (JvmOperation) value, null, state); } else { throw new IllegalStateException("Unexpected feature type " + value); } } } else { for (XAnnotationElementValuePair pair : valuePairs) { computeTypes(object, pair.getElement(), pair.getValue(), state); } } } } else { state.addDiagnostic(new EObjectDiagnosticImpl(Severity.ERROR, IssueCodes.INCOMPATIBLE_TYPES, String.format("Type mismatch: cannot convert from %s to Annotation", annotationType.getSimpleName()), object, XAnnotationsPackage.Literals.XANNOTATION__ANNOTATION_TYPE, -1, null)); computeChildTypesForUnknownAnnotation(object, state); } state.acceptActualType(state.getReferenceOwner().newParameterizedTypeReference(annotationType)); } else { computeChildTypesForUnknownAnnotation(object, state); } }