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

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.opengamma.engine.marketdata.manipulator.YieldCurveNodeExtractor.java

private String getSingleProperty(final ValueSpecification spec, final String propertyName) {
    final ValueProperties properties = spec.getProperties();
    final Set<String> curves = properties.getValues(propertyName);
    return Iterables.getOnlyElement(curves);
}

From source file:org.apache.drill.exec.physical.impl.window.StreamingWindowFrameBatchCreator.java

@Override
public RecordBatch getBatch(FragmentContext context, WindowPOP config, List<RecordBatch> children)
        throws ExecutionSetupException {
    return new StreamingWindowFrameRecordBatch(config, context, Iterables.getOnlyElement(children));
}

From source file:gr.forth.ics.swkm.model2.ModelDiff.java

private static void checkTriplesOfFirstContainedInSecond(Model m1, Model m2) {
    for (Triple t : m1.triples().fetch()) {
        for (Resource ng : t.graphs()) {
            Triples triples = m2.triples().g(ng.mappedTo(m2)).s(t.subject().mappedTo(m2))
                    .p(t.predicate().mappedTo(m2)).o(t.object().mappedTo(m2)).fetch();
            Iterables.getOnlyElement(triples);
        }//from w w  w .  j  a va 2  s. co m
    }
}

From source file:com.opengamma.financial.analytics.timeseries.VolatilityWeightedYieldCurveNodeReturnSeriesFunction.java

@Override
protected String getYCHTSStart(ValueProperties constraints) {
    Set<String> startDates = constraints.getValues(HistoricalTimeSeriesFunctionUtils.START_DATE_PROPERTY);
    if (startDates == null || startDates.size() != 1) {
        return null;
    }//from   w ww.  j ava2  s.c  o m
    String startDate = Iterables.getOnlyElement(startDates);

    Set<String> volWeightingStartDates = constraints
            .getValues(VolatilityWeightingFunctionUtils.VOLATILITY_WEIGHTING_START_DATE_PROPERTY);
    if (volWeightingStartDates == null || volWeightingStartDates.size() != 1) {
        // NOTE jonathan 2013-04-29 -- should start a day earlier so the result after weighting starts at the startDate,
        // but need to know previous date with data
        return startDate;
    } else {
        return Iterables.getOnlyElement(volWeightingStartDates);
    }
}

From source file:org.jclouds.http.functions.UnwrapOnlyNestedJsonValueInSet.java

@Override
public T apply(HttpResponse arg0) {
    Set<T> set = json.apply(arg0);
    if (set == null || set.size() == 0)
        return null;
    return Iterables.getOnlyElement(set);
}

From source file:org.apache.drill.exec.schema.ListSchema.java

@Override
public void addField(Field field) {
    if (field.getFieldType().getMode() == DataMode.REPEATED || fields.isEmpty() || !isSingleTyped()
            || !Iterables.getOnlyElement(fields).equals(field.getFieldType())) {
        fields.add(field);//from   w  w w. j a va2 s  .  c  o m
    }
}

From source file:edu.umn.msi.tropix.common.jobqueue.deployer.DeployerProperties.java

public String get() {
    Preconditions.checkState(properties.size() == 1,
            "Expected to have exactly one property when get() is called, actual number " + properties.size());
    return apply(Iterables.getOnlyElement(properties.keySet()));
}

From source file:org.apache.drill.exec.physical.impl.producer.ProducerConsumerBatchCreator.java

@Override
public ProducerConsumerBatch getBatch(FragmentContext context, ProducerConsumer config,
        List<RecordBatch> children) throws ExecutionSetupException {
    return new ProducerConsumerBatch(config, context, Iterables.getOnlyElement(children));
}

From source file:sklearn.linear_model.BaseLinearRegressor.java

@Override
public RegressionModel encodeModel(Schema schema) {
    return RegressionModelUtil.encodeRegressionModel(getCoef(), Iterables.getOnlyElement(getIntercept()),
            schema);
}

From source file:com.google.api.tools.framework.importers.swagger.aspects.utils.VendorExtensionUtils.java

/** Returns name of the vendor extension used. */
public static <T> String usedExtension(DiagCollector diagCollector, Map<String, Object> vendorExtensions,
        String extensionName, String... legacyNamesForExtension) {
    if (vendorExtensions != null) {
        warnOnLegacyExtensions(legacyNamesForExtension, vendorExtensions, extensionName, diagCollector);

        Iterable<String> allNamesForExtension = ImmutableList.<String>builder().add(legacyNamesForExtension)
                .add(extensionName).build();

        List<String> usedExtensionNames = getExtensionsNamesUsed(vendorExtensions, allNamesForExtension);

        if (usedExtensionNames.size() > 1) {
            diagCollector.addDiag(Diag.error(new SimpleLocation(extensionName),
                    "OpenAPI spec is invalid since multiple "
                            + "extension definitions '%s' for the same extension are used. Please provide "
                            + "only one extension definition with name '%s'.",
                    Joiner.on(",").join(usedExtensionNames), extensionName));
            return "";
        } else if (usedExtensionNames.size() == 1) {
            return Iterables.getOnlyElement(usedExtensionNames);
        }// www  .  j  a  va2 s. co m
    }
    return "";
}