Example usage for com.google.common.collect Iterables getOnlyElement

List of usage examples for com.google.common.collect Iterables getOnlyElement

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Introduction

In this page you can find the example usage for com.google.common.collect Iterables getOnlyElement.

Prototype

public static <T> T getOnlyElement(Iterable<T> iterable)

Source Link

Document

Returns the single element contained in iterable .

Usage

From source file:com.google.errorprone.refaster.CodeTransformerTestHelper.java

public JavaFileObject transform(JavaFileObject original) {
    JavaCompiler compiler = JavacTool.create();
    DiagnosticCollector<JavaFileObject> diagnosticsCollector = new DiagnosticCollector<JavaFileObject>();
    StandardJavaFileManager fileManager = compiler.getStandardFileManager(diagnosticsCollector, Locale.ENGLISH,
            UTF_8);//from   w  w w.j  ava  2  s. c o m
    JavacTaskImpl task = (JavacTaskImpl) compiler.getTask(CharStreams.nullWriter(), fileManager,
            diagnosticsCollector, ImmutableList.<String>of(), null, ImmutableList.of(original));

    try {
        SourceFile sourceFile = SourceFile.create(original);
        Iterable<? extends CompilationUnitTree> trees = task.parse();
        task.analyze();
        JCCompilationUnit tree = Iterables.getOnlyElement(Iterables.filter(trees, JCCompilationUnit.class));
        DescriptionBasedDiff diff = DescriptionBasedDiff.create(tree);
        transformer().apply(new TreePath(tree), task.getContext(), diff);
        diff.applyDifferences(sourceFile);

        return JavaFileObjects.forSourceString(
                Iterables.getOnlyElement(Iterables.filter(tree.getTypeDecls(), JCClassDecl.class)).sym
                        .getQualifiedName().toString(),
                sourceFile.getSourceText());
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}

From source file:org.jclouds.vcloud.terremark.TerremarkECloudClientLiveTestDisabled.java

@Override
protected Entry<InternetService, PublicIpAddress> getNewInternetServiceAndIpForSSH(URI vdc) {
    PublicIpAddress ip = TerremarkECloudClient.class.cast(tmClient)
            .activatePublicIpInVDC(tmClient.findVDCInOrgNamed(null, null).getHref());
    InternetService is = tmClient.addInternetServiceToExistingIp(ip.getId(), "SSH", Protocol.TCP, 22);
    Map<InternetService, PublicIpAddress> result = ImmutableMap.<InternetService, PublicIpAddress>of(is, ip);
    Entry<InternetService, PublicIpAddress> entry = Iterables.getOnlyElement(result.entrySet());
    return entry;
}

From source file:org.obm.icalendar.ical4jwrapper.ICalendarRecur.java

public Integer byMonthDay() {
    Collection<Integer> monthDayList = recur.getMonthDayList();
    if (monthDayList != null && !monthDayList.isEmpty()) {
        return Iterables.getOnlyElement(monthDayList);
    }/*www.ja  va 2s  .c o  m*/
    return null;
}

From source file:org.sosy_lab.cpachecker.cpa.smg.join.SMGJoinMapTargetAddress.java

public SMGJoinMapTargetAddress(SMG pSMG1, SMG pSMG2, SMG destSMG, SMGNodeMapping pMapping1,
        SMGNodeMapping pMapping2, Integer pAddress1, Integer pAddress2) {
    smg = destSMG;//  w  w  w.  ja  va  2s. co m
    mapping1 = pMapping1;
    mapping2 = pMapping2;
    SMGObject target = destSMG.getNullObject();

    // TODO: Ugly, refactor
    SMGEdgePointsTo pt = pSMG1.getPointer(pAddress1);
    SMGEdgePointsTo pt2 = pSMG2.getPointer(pAddress2);
    if (pt.getObject().notNull()) {
        target = pMapping1.get(pt.getObject());
    }

    SMGTargetSpecifier tg;

    /*When mapping optional object to other abstract object, use tg of other object.*/
    if ((pt.getObject().isAbstract() && pt.getObject().getKind() != SMGObjectKind.OPTIONAL) || pt2 == null
            || pt2.getObject().getKind() == SMGObjectKind.OPTIONAL) {
        tg = pt.getTargetSpecifier();
    } else {
        tg = pt2.getTargetSpecifier();
    }

    Set<SMGEdgePointsTo> edges = smg.getPtEdges(SMGEdgePointsToFilter.targetObjectFilter(target)
            .filterAtTargetOffset(pt.getOffset()).filterByTargetSpecifier(tg));

    if (!edges.isEmpty()) {
        value = Iterables.getOnlyElement(edges).getValue();
        return;
    }

    if (pAddress1.equals(pAddress2)) {
        value = pAddress1;
    } else {
        value = SMGValueFactory.getNewValue();
    }

    smg.addValue(value);

    SMGEdgePointsTo nPtEdge = new SMGEdgePointsTo(value, target, pt.getOffset(), tg);

    smg.addPointsToEdge(nPtEdge);
    mapping1.map(pAddress1, value);
    mapping2.map(pAddress2, value);
}

From source file:com.opengamma.financial.analytics.model.future.BondFutureFunction.java

@Override
public Set<ComputedValue> execute(final FunctionExecutionContext executionContext, final FunctionInputs inputs,
        final ComputationTarget target, final Set<ValueRequirement> desiredValues) {
    final ZonedDateTime date = ZonedDateTime.now(executionContext.getValuationClock());
    final ValueRequirement desiredValue = Iterables.getOnlyElement(desiredValues);
    final BondFutureSecurity security = (BondFutureSecurity) target.getSecurity();
    final BondFutureDefinition definition = (BondFutureDefinition) security.accept(_visitor);
    final Double referencePrice = 0.0; // TODO Futures Refactor
    final String[] curveNames = getCurveNames(desiredValue);
    final BondFuture bondFuture = definition.toDerivative(date, referencePrice, curveNames);
    return calculate(security, bondFuture, getData(desiredValue, inputs, target), target);
}

From source file:sklearn.svm.BaseLibSVMRegressor.java

@Override
public SupportVectorMachineModel encodeModel(Schema schema) {
    int[] shape = getSupportVectorsShape();

    int numberOfVectors = shape[0];
    int numberOfFeatures = shape[1];

    List<Integer> support = getSupport();
    List<? extends Number> supportVectors = getSupportVectors();
    List<? extends Number> dualCoef = getDualCoef();
    List<? extends Number> intercept = getIntercept();

    VectorDictionary vectorDictionary = SupportVectorMachineUtil.encodeVectorDictionary(support, supportVectors,
            numberOfVectors, numberOfFeatures, schema);

    List<VectorInstance> vectorInstances = vectorDictionary.getVectorInstances();

    Kernel kernel = SupportVectorMachineUtil.encodeKernel(getKernel(), getDegree(), getGamma(), getCoef0());

    SupportVectorMachine supportVectorMachine = SupportVectorMachineUtil
            .encodeSupportVectorMachine(vectorInstances, dualCoef, Iterables.getOnlyElement(intercept));

    SupportVectorMachineModel supportVectorMachineModel = new SupportVectorMachineModel(
            MiningFunction.REGRESSION, ModelUtil.createMiningSchema(schema), vectorDictionary, null)
                    .setKernel(kernel).addSupportVectorMachines(supportVectorMachine);

    return supportVectorMachineModel;
}

From source file:org.trancecode.xproc.step.TemplateStepProcessor.java

@Override
protected void execute(final StepInput input, final StepOutput output) {
    LOG.trace("start of step");
    assert input != null;
    assert output != null;

    final XdmNode templateNode = input.readNode(XProcPorts.TEMPLATE);
    final Iterable<XdmNode> sourceNodeList = input.readNodes(XProcPorts.SOURCE);
    final int sourcesCount = Iterables.size(sourceNodeList);
    final XdmNode sourceNode;

    assert templateNode != null;
    assert sourceNodeList != null;

    if (sourcesCount == 1) {
        sourceNode = Iterables.getOnlyElement(sourceNodeList);
    } else if (sourcesCount > 1) {
        throw XProcExceptions.xc0068(input.getLocation());
    } else {//from  ww w .j a  v  a  2s  . co m
        sourceNode = null;
    }

    final Map<QName, String> parameters = input.getParameters(XProcPorts.PARAMETERS);
    final Processor processor = input.getPipelineContext().getProcessor();
    final SaxonBuilder builder = new SaxonBuilder(processor.getUnderlyingConfiguration());

    builder.startDocument();
    processNode(templateNode, sourceNode, input, builder, processor, parameters);
    builder.endDocument();

    final XdmNode resultNode = builder.getNode();
    output.writeNodes(XProcPorts.RESULT, resultNode);
    LOG.trace("built result:\n{}", resultNode);
    LOG.trace("end of step");
}

From source file:org.springframework.xd.ec2.cloud.AWSInstanceProvisioner.java

/**
 * Retrieve the instance information for the instance id based on the EC2Client
 * @param client AWS Client that executes the commands necessary to create the instance.
 * @param instanceId The id of the instance.
 * @return Instance with that instance id.
 *//*from   w  w  w . ja v a  2s  .  co  m*/
public static RunningInstance findInstanceById(AWSEC2Api client, String instanceId) {
    Assert.notNull(client, "client can not be null");
    // search my account for the instance I just created
    Set<? extends Reservation<? extends RunningInstance>> reservations = client.getInstanceApi().get()
            .describeInstancesInRegion(null, instanceId); // last parameter (ids) narrows the
    // since we refined by instanceId there should only be one instance
    return Iterables.getOnlyElement(Iterables.getOnlyElement(reservations));
}

From source file:com.opengamma.financial.analytics.model.equity.EquityOptionMonetizedVegaFunction.java

@Override
public Set<ValueRequirement> getRequirements(final FunctionCompilationContext context,
        final ComputationTarget target, final ValueRequirement desiredValue) {
    final ValueProperties constraints = desiredValue.getConstraints();
    final Set<String> calculationMethod = constraints.getValues(ValuePropertyNames.CALCULATION_METHOD);
    if (calculationMethod == null || calculationMethod.size() != 1) {
        s_logger.error("Need to have a single calculation method");
        return null;
    }//from w  ww .  j a  va2 s  .c o  m
    final ValueProperties properties = ValueProperties.builder()
            .with(ValuePropertyNames.CALCULATION_METHOD, Iterables.getOnlyElement(calculationMethod)).get();
    return Collections
            .singleton(new ValueRequirement(ValueRequirementNames.VEGA, target.toSpecification(), properties));
}

From source file:io.druid.sql.calcite.aggregation.builtin.MaxSqlAggregator.java

@Nullable
@Override//from  ww w  . j  av a  2s  .  c  om
public Aggregation toDruidAggregation(final PlannerContext plannerContext, final RowSignature rowSignature,
        final RexBuilder rexBuilder, final String name, final AggregateCall aggregateCall,
        final Project project, final List<Aggregation> existingAggregations) {
    if (aggregateCall.isDistinct()) {
        return null;
    }

    final List<DruidExpression> arguments = Aggregations.getArgumentsForSimpleAggregator(plannerContext,
            rowSignature, aggregateCall, project);

    if (arguments == null) {
        return null;
    }

    final DruidExpression arg = Iterables.getOnlyElement(arguments);
    final ValueType valueType = Calcites.getValueTypeForSqlTypeName(aggregateCall.getType().getSqlTypeName());
    final ExprMacroTable macroTable = plannerContext.getExprMacroTable();

    final String fieldName;
    final String expression;

    if (arg.isDirectColumnAccess()) {
        fieldName = arg.getDirectColumn();
        expression = null;
    } else {
        fieldName = null;
        expression = arg.getExpression();
    }

    return Aggregation.create(createMaxAggregatorFactory(valueType, name, fieldName, expression, macroTable));
}