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.groupon.jenkins.dynamic.buildconfiguration.NotificationsSection.java

public List<PostBuildNotifier> getNotifiers() {
    List<?> notifierSpecs = getConfigValue().getValue();
    List<PostBuildNotifier> notifiers = new ArrayList<PostBuildNotifier>(notifierSpecs.size());
    for (Object pluginSpec : notifierSpecs) {
        String pluginName;/*from   www. ja v  a2  s .  c  o m*/
        Object options;
        if (pluginSpec instanceof String) {
            pluginName = (String) pluginSpec;
            options = new HashMap<String, String>();
        } else { // has to be a Map
            Map<String, Object> pluginSpecMap = (Map<String, Object>) pluginSpec;
            pluginName = Iterables.getOnlyElement(pluginSpecMap.keySet());
            options = pluginSpecMap.get(pluginName);
        }
        notifiers.add(createNotifier(pluginName, options));
    }
    return notifiers;
}

From source file:com.google.template.soy.jssrc.dsl.ConditionalBuilder.java

private boolean isRepresentableAsTernaryExpression(ImmutableList<IfThenPair> pairs) {
    if (pairs.size() != 1 || trailingElse == null) {
        return false;
    }//from  w  w  w. j a v  a 2  s . c om

    IfThenPair ifThen = Iterables.getOnlyElement(pairs);
    CodeChunk.WithValue predicate = ifThen.predicate;
    CodeChunk consequent = ifThen.consequent;
    return consequent instanceof CodeChunk.WithValue && trailingElse instanceof CodeChunk.WithValue
            && predicate.initialStatements().containsAll(((WithValue) consequent).initialStatements())
            && predicate.initialStatements().containsAll(((WithValue) trailingElse).initialStatements());
}

From source file:edu.uci.ics.jung.layout.algorithms.BalloonLayoutAlgorithm.java

protected void setRootPolars(LayoutModel<N> layoutModel) {
    Graph<N> graph = layoutModel.getGraph();
    Set<N> roots = TreeUtils.roots(graph);
    int width = layoutModel.getWidth();
    if (roots.size() == 1) {
        // its a Tree
        N root = Iterables.getOnlyElement(roots);
        setRootPolar(layoutModel, root);
        setPolars(layoutModel, graph.successors(root), getCenter(layoutModel), width / 2);
    } else if (roots.size() > 1) {
        // its a Network
        setPolars(layoutModel, roots, getCenter(layoutModel), width / 2);
    }/*from   w  w  w.j  ava  2s.c  o  m*/
}

From source file:org.sosy_lab.cpachecker.cpa.smg.refiner.SMGStrongestPostOperator.java

@Override
public Optional<SMGState> getStrongestPost(SMGState pOrigin, Precision pPrecision, CFAEdge pOperation)
        throws CPAException, InterruptedException {

    final Collection<? extends AbstractState> successors = transfer.getAbstractSuccessorsForEdge(pOrigin,
            pPrecision, pOperation);//from   www  .j a v a  2 s  .c  o  m

    if (successors.isEmpty()) {
        return Optional.absent();

    } else {
        return Optional.of((SMGState) Iterables.getOnlyElement(successors));
    }
}

From source file:com.vmware.photon.controller.apife.commands.steps.HostEnterSuspendedModeStepCmd.java

@Override
protected void execute() throws ExternalException {

    // Precondition check: only one host can be referenced.
    List<BaseEntity> entityList = step.getTransientResourceEntities();
    HostEntity hostEntity = (HostEntity) Iterables.getOnlyElement(entityList);

    // Call deployer for action and error handling.
    try {//www .  ja  v  a 2  s . c  om
        taskCommand.getDeployerClient().enterSuspendedMode(hostEntity.getId());
        hostBackend.updateState(hostEntity, HostState.SUSPENDED);
    } catch (InterruptedException | RpcException e) {
        HostStateChangeException exception = new HostStateChangeException(hostEntity, HostState.SUSPENDED, e);
        throw exception;
    }
}

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

@Override
public Set<ComputedValue> execute(FunctionExecutionContext executionContext, FunctionInputs inputs,
        ComputationTarget target, Set<ValueRequirement> desiredValues) throws AsynchronousExecution {
    final ValueRequirement desiredValue = desiredValues.iterator().next();
    ValueProperties properties = desiredValue.getConstraints();
    String scaleProperty = Double.toString(1);
    double scaleFactor = 1.0;
    if (target.getSecurity() instanceof InterestRateFutureSecurity) {
        // Add scaling and adjust properties to reflect
        final Set<String> scaleValue = desiredValue.getConstraints().getValues(ValuePropertyNames.SCALE);
        if (scaleValue != null && scaleValue.size() > 0) {
            scaleProperty = Iterables.getOnlyElement(scaleValue);
            scaleFactor = Double.parseDouble(scaleProperty);
        }/*from   w  w  w .java 2  s . co m*/
        properties = properties.copy().withoutAny(ValuePropertyNames.SCALE)
                .with(ValuePropertyNames.SCALE, scaleProperty).get();
    }
    final ValueSpecification valueSpecification = new ValueSpecification(getValueRequirementName(),
            target.toSpecification(), properties);
    final ComputedValue result = new ComputedValue(valueSpecification, scaleFactor);
    return Sets.newHashSet(result);
}

From source file:com.cloudera.nav.plugin.model.relations.InstanceOfRelation.java

public String getTemplateId() {
    return Iterables.getOnlyElement(getEp1Ids());
}

From source file:ezbake.services.graph.SelectorVertexFactory.java

private Long lookup(String uniqueVal) {
    SecureTitanTx tx = graph.buildTransaction()
            .setReadToken(AccumuloSecurityToken.getInstance().newReadToken(UNIQUE_VIS)).start();

    Iterable<Vertex> itrbl = tx.getVertices(EzGraphServiceConstants.UNIQUE_KEY, uniqueVal);

    Long vid = null;//w  w  w. j  a v  a 2s. c o  m
    if (!Iterables.isEmpty(itrbl)) {
        TitanVertex selectorVertex = (TitanVertex) Iterables.getOnlyElement(itrbl);
        vid = selectorVertex.getID();
    }

    return vid;
}

From source file:com.google.devtools.build.lib.rules.android.AndroidDeviceScriptFixture.java

/**
 * Gets the fixture script from the {@code script} attribute if set or else writes a file
 * containing the contents of the {@code cmd} attribute. Also, checks that exactly one of {@code
 * script} and {@code cmd} is set./*  w w  w.ja  v  a  2 s . c  o m*/
 */
private static Artifact getFixtureScript(RuleContext ruleContext)
        throws RuleErrorException, InterruptedException {
    String cmd = null;
    if (ruleContext.attributes().isAttributeValueExplicitlySpecified("cmd")) {
        cmd = ruleContext.attributes().get("cmd", Type.STRING);
    }
    TransitiveInfoCollection script = ruleContext.getPrerequisite("script", Mode.TARGET);

    if (((cmd == null) && (script == null)) || ((cmd != null) && (script != null))) {
        ruleContext.throwWithRuleError(
                "android_host_service_fixture requires that exactly one of the script and cmd attributes "
                        + "be specified");
    }

    if (cmd == null) {
        // The fact that there is only one file and that it has the right extension is enforced by the
        // rule definition.
        return Iterables.getOnlyElement(script.getProvider(FileProvider.class).getFilesToBuild());
    } else {
        return writeFixtureScript(ruleContext, cmd);
    }
}

From source file:io.crate.execution.ddl.ESClusterUpdateSettingsTask.java

static Settings buildSettingsFrom(Map<String, List<Expression>> settingsMap, Row parameters) {
    Settings.Builder settings = Settings.builder();
    for (Map.Entry<String, List<Expression>> entry : settingsMap.entrySet()) {
        String settingsName = entry.getKey();
        if (CrateSettings.isValidSetting(settingsName) == false) {
            throw new IllegalArgumentException("Setting '" + settingsName + "' is not supported");
        }/*from  ww  w  .  ja v  a 2  s  .c o m*/

        List<Expression> value = entry.getValue();
        // value can be null to reset settings
        if (value == null) {
            settings.put(settingsName, (String) null);
        } else {
            CrateSettings.flattenSettings(settings, settingsName,
                    ExpressionToObjectVisitor.convert(Iterables.getOnlyElement(value), parameters));
        }
    }
    return settings.build();
}