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:org.sonar.batch.rule.QProfileSensor.java

public void analyse(Project project, SensorContext context) {
    for (String language : fs.languages()) {
        ModuleQProfiles.QProfile qProfile = moduleQProfiles.findByLanguage(language);
        if (qProfile != null) {
            dao.updateUsedColumn(qProfile.id(), true);
        }/*  w w  w . j  a v  a  2 s  . c  o m*/
    }
    if (fs.languages().size() == 1) {
        String language = Iterables.getOnlyElement(fs.languages());
        ModuleQProfiles.QProfile qProfile = moduleQProfiles.findByLanguage(language);
        if (qProfile != null) {
            Measure measure = new Measure(CoreMetrics.PROFILE, qProfile.name())
                    .setValue((double) qProfile.id());
            Measure measureVersion = new Measure(CoreMetrics.PROFILE_VERSION, qProfile.version().doubleValue());
            context.saveMeasure(measure);
            context.saveMeasure(measureVersion);
        }
    }
}

From source file:org.jclouds.gogrid.predicates.ServerLatestJobCompleted.java

@Override
public boolean apply(Server server) {
    checkNotNull(server, "Server must be a valid instance");
    checkNotNull(server.getName(), "Server must be a valid name");
    Job latestJob = Iterables.getOnlyElement(jobClient.getJobList(latestJobForObjectByName(server.getName())));
    return JobState.SUCCEEDED.equals(latestJob.getCurrentState());
}

From source file:dagger.android.processor.AndroidMapKeys.java

private static TypeMirror mapKeyValue(Class<? extends Annotation> annotation, Elements elements) {
    List<ExecutableElement> mapKeyMethods = methodsIn(
            elements.getTypeElement(annotation.getCanonicalName()).getEnclosedElements());
    TypeMirror returnType = Iterables.getOnlyElement(mapKeyMethods).getReturnType();
    // TODO(ronshapiro): replace with MoreTypes.asWildcard() when auto-common 0.9 is released
    return ((WildcardType) Iterables.getOnlyElement(MoreTypes.asDeclared(returnType).getTypeArguments()))
            .getExtendsBound();//from ww  w.  j  a v a  2  s.  c  om
}

From source file:io.prestosql.sql.planner.plan.AssignUniqueId.java

@Override
public PlanNode replaceChildren(List<PlanNode> newChildren) {
    checkArgument(newChildren.size() == 1, "expected newChildren to contain 1 node");
    return new AssignUniqueId(getId(), Iterables.getOnlyElement(newChildren), idColumn);
}

From source file:org.sonar.java.checks.SillyEqualsCheck.java

@Override
protected void onMethodInvocationFound(MethodInvocationTree tree) {
    ExpressionTree firstArgument = Iterables.getOnlyElement(tree.arguments());
    Type argumentType = firstArgument.symbolType().erasure();
    if (argumentType.isPrimitive()) {
        argumentType = ((JavaType) argumentType).primitiveWrapperType();
    }//from   w w  w  .  jav a  2s. c o  m
    Type ownerType = getMethodOwnerType(tree).erasure();
    IdentifierTree methodInvocationName = MethodsHelper.methodName(tree);
    if (isLiteralNull(firstArgument)) {
        reportIssue(methodInvocationName,
                "Remove this call to \"equals\"; comparisons against null always return false; consider using '== null' to check for nullity.");
    } else if (ownerType.isArray()) {
        checkWhenOwnerIsArray(methodInvocationName, (Type.ArrayType) ownerType, argumentType);
    } else {
        checkWhenOwnerIsNotArray(methodInvocationName, ownerType, argumentType);
    }
}

From source file:org.apache.beam.runners.dataflow.worker.graph.RemoveFlattenInstructionsFunction.java

@Override
public MutableNetwork<Node, Edge> apply(MutableNetwork<Node, Edge> network) {
    for (Node node : ImmutableList.copyOf(Iterables.filter(network.nodes(), IsFlatten.INSTANCE))) {

        // For each successor instruction after the Flatten, connect it directly to the
        // predecessor PCollections of Flatten.
        Node flattenPCollection = Iterables.getOnlyElement(network.successors(node));
        for (Node successorInstruction : ImmutableList.copyOf(network.successors(flattenPCollection))) {
            for (Edge edge : ImmutableList
                    .copyOf(network.edgesConnecting(flattenPCollection, successorInstruction))) {
                for (Node predecessorPCollection : ImmutableList.copyOf(network.predecessors(node))) {
                    network.addEdge(predecessorPCollection, successorInstruction, edge.clone());
                }/*from w  ww .j  a v a2  s .  c  o  m*/
            }
        }

        // Remove the Flatten instruction and its output PCollection.
        network.removeNode(flattenPCollection);
        network.removeNode(node);
    }
    return network;
}

From source file:edu.uci.ics.jung.graph.DelegateCTree.java

@Override
public Optional<N> predecessor(N node) {
    checkNotNull(node, "node");
    Set<N> predecessors = delegate.predecessors(node);
    checkState(predecessors.size() <= 1);
    return predecessors.isEmpty() ? Optional.empty() : Optional.of(Iterables.getOnlyElement(predecessors));
}

From source file:com.eucalyptus.compute.vpc.persist.PersistenceSecurityGroups.java

@Override
public <T> T lookupDefault(final String vpcId, final Function<? super NetworkGroup, T> transform)
        throws VpcMetadataException {
    try {/*  w  w  w  . j a v a 2 s. c  om*/
        return Iterables.getOnlyElement(
                listByExample(NetworkGroup.namedForVpc(vpcId, NetworkGroups.defaultNetworkName()),
                        Predicates.alwaysTrue(), transform));
    } catch (NoSuchElementException e) {
        throw new VpcMetadataNotFoundException("Default security group not found for " + vpcId);
    }
}

From source file:grakn.core.graql.reasoner.utils.TarjanSCC.java

/**
 * A cycle isa a connected component that has more than one vertex or a single vertex linked to itself.
 * @return list of cycles in the graph/*from  w  w  w .  ja  va  2 s  .  co m*/
 */
public List<Set<T>> getCycles() {
    return scc.stream()
            .filter(cc -> cc.size() > 1
                    || graph.get(Iterables.getOnlyElement(cc)).contains(Iterables.getOnlyElement(cc)))
            .collect(Collectors.toList());
}

From source file:com.google.gerrit.server.query.Predicate.java

/** Combine the passed predicates into a single OR node. */
public static <T> Predicate<T> or(final Collection<? extends Predicate<T>> that) {
    if (that.size() == 1) {
        return Iterables.getOnlyElement(that);
    }//ww  w  . jav a 2 s .com
    return new OrPredicate<T>(that);
}