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:de.cosmocode.palava.ipc.xml.rpc.adapters.ValueType.java

/**
 * Returns the type associated with a given value.
 * /*from  w w w  .  j a  va  2s  .c  o  m*/
 * @since 1.0
 * @param value the value
 * @return the {@link ValueType} representing the type of the specified value
 * @throws NullPointerException if value is null
 */
public static ValueType of(Value value) {
    Preconditions.checkNotNull(value, "Value");
    final Serializable first = Iterables.getOnlyElement(value.getContent());
    final JAXBElement<?> element;
    final Object content;

    if (first instanceof JAXBElement<?>) {
        element = JAXBElement.class.cast(first);
        content = element.getValue();
    } else {
        element = null;
        content = first;
    }

    // ordering from the most used to the least
    if (first instanceof String) {
        return STRING;
    } else if (DATETIME_ISO8601_NAME.equals(element.getName())) {
        return DATETIME_ISO801;
    } else {
        return of(value, content);
    }
}

From source file:com.google.devtools.build.lib.analysis.config.transitions.SplitTransition.java

/**
 * Returns true iff {@code option} and {@splitOptions} are equal.
 *
 * <p>This can be used to determine if a split is a noop.
 *//*  w w w  . j  a va 2 s .c o  m*/
static boolean equals(BuildOptions options, List<BuildOptions> splitOptions) {
    return splitOptions.size() == 1 && Iterables.getOnlyElement(splitOptions).equals(options);
}

From source file:org.apache.provisionr.cloudstack.core.SecurityGroups.java

/**
 * Get a SecurityGroup by name.//w ww .ja va2  s.com
 *
 * @throws NoSuchElementException if securityGroup does not exist.
 */
public static SecurityGroup getByName(CloudStackClient cloudStackClient, String securityGroup) {
    return Iterables
            .getOnlyElement(cloudStackClient.getSecurityGroupClient().listSecurityGroups(named(securityGroup)));
}

From source file:dagger.producers.monitoring.TimingRecorders.java

/**
 * Returns a timing recorder factory that delegates to the given factories, and ensures that any
 * method called on this object, even transitively, does not throw a {@link RuntimeException} or
 * return null./*from  w  w  w  .j  ava2s  . com*/
 *
 * <p>If the delegate recorders throw an {@link Error}, then that will escape this recorder
 * implementation. Errors are treated as unrecoverable conditions, and may cause the entire
 * component's execution to fail.
 */
public static ProductionComponentTimingRecorder.Factory delegatingProductionComponentTimingRecorderFactory(
        Collection<ProductionComponentTimingRecorder.Factory> factories) {
    switch (factories.size()) {
    case 0:
        return noOpProductionComponentTimingRecorderFactory();
    case 1:
        return new NonThrowingProductionComponentTimingRecorder.Factory(Iterables.getOnlyElement(factories));
    default:
        return new DelegatingProductionComponentTimingRecorder.Factory(factories);
    }
}

From source file:com.groupon.jenkins.dynamic.build.execution.DynamicBuildExection.java

private static DynamicBuildRunner getBuildRunner(DynamicBuild build, BuildExecutionContext dynamicBuildRun,
        BuildType buildType, DotCiPluginRunner dotCiPluginRunner) {
    return build.getBuildConfiguration().isParallized()
            ? new DynamicMultiConfigBuildRunner(build, buildType, dotCiPluginRunner)
            : new DynamicSingleConfigBuildRunner(build, dynamicBuildRun, buildType, dotCiPluginRunner,
                    Iterables.getOnlyElement(build.getAxisList()));
}

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

@Override
protected String getFCHTSStart(ValueProperties constraints) {
    Set<String> startDates = constraints.getValues(HistoricalTimeSeriesFunctionUtils.START_DATE_PROPERTY);
    if (startDates == null || startDates.size() != 1) {
        return null;
    }// w w w .  j  a  v a 2  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.apache.beam.sdk.fn.data.RemoteGrpcPortRead.java

public static RemoteGrpcPortRead fromPTransform(PTransform pTransform) throws InvalidProtocolBufferException {
    checkArgument(URN.equals(pTransform.getSpec().getUrn()), "Expected URN for %s, got %s",
            RemoteGrpcPortRead.class.getSimpleName(), pTransform.getSpec().getUrn());
    checkArgument(pTransform.getOutputsCount() == 1, "Expected exactly one output, got %s",
            pTransform.getOutputsCount());
    RemoteGrpcPort port = RemoteGrpcPort.parseFrom(pTransform.getSpec().getPayload());
    String outputPcollection = Iterables.getOnlyElement(pTransform.getOutputsMap().values());
    return readFromPort(port, outputPcollection);
}

From source file:net.sourceforge.pmd.lang.apex.rule.apexunit.ApexUnitTestClassShouldHaveAsserts.java

private Object checkForAssertStatements(ApexNode<?> node, Object data) {
    final List<ASTBlockStatement> blockStatements = node.findDescendantsOfType(ASTBlockStatement.class);
    final List<ASTStatement> statements = Iterables.getOnlyElement(blockStatements)
            .findDescendantsOfType(ASTStatement.class);
    boolean isAssertFound = false;

    for (final ASTStatement statement : statements) {
        final List<ASTMethodCallExpression> methodCalls = statement
                .findDescendantsOfType(ASTMethodCallExpression.class);

        for (final ASTMethodCallExpression methodCallExpression : methodCalls) {
            final String methodName = methodCallExpression.getNode().getMethod().getName();

            if (methodCallExpression.getNode().getDefiningType().getApexName().equalsIgnoreCase(SYSTEM)
                    && (methodName.equalsIgnoreCase(ASSERT) || methodName.equalsIgnoreCase(ASSERT_EQUALS)
                            || methodName.equalsIgnoreCase(ASSERT_NOT_EQUALS))) {
                isAssertFound = true;/*from   w ww .  j  a  v a2  s.com*/
            }
        }
    }

    if (!isAssertFound) {
        addViolation(data, node);
    }

    return data;
}

From source file:com.opengamma.financial.analytics.model.forex.AbstractForexSpotRateMarketDataFunction.java

@Override
public Set<ComputedValue> execute(final FunctionExecutionContext executionContext, final FunctionInputs inputs,
        final ComputationTarget target, final Set<ValueRequirement> desiredValues) {
    final ComputedValue inputValue = Iterables.getOnlyElement(inputs.getAllValues());
    final ValueSpecification outputSpec = new ValueSpecification(ValueRequirementNames.SPOT_RATE,
            target.toSpecification(), createValueProperties().get());
    return ImmutableSet.of(new ComputedValue(outputSpec, inputValue.getValue()));
}

From source file:org.jclouds.ibmdev.functions.GetFirstInstanceInList.java

@Override
public Instance apply(HttpResponse from) {
    return Iterables.getOnlyElement(listParser.apply(from));
}