Example usage for com.google.common.base Preconditions checkState

Introduction

In this page you can find the example usage for com.google.common.base Preconditions checkState.

Prototype

public static void checkState(boolean expression, @Nullable Object errorMessage)

Source Link

Document

Ensures the truth of an expression involving the state of the calling instance, but not involving any parameters to the calling method.

Usage

From source file:graph.features.cpp.ClosedCPP.java

public static <T> ClosedCPP<T> from(final UndirectedGraph<T> graph,
        final MatchingAlgorithmInterface matchingAlgorithm) {
    Preconditions.checkArgument(graph != null);
    Preconditions.checkArgument(matchingAlgorithm != null);
    final ConnectivityInterface<T> feature = graph.fetch(ConnectivityFeature.class).up();
    Preconditions.checkState(feature.isConnected(), "Graph must be connected.");
    return new ClosedCPP<T>(graph, matchingAlgorithm);
}

From source file:org.locationtech.geogig.plumbing.TransactionResolve.java

/**
 * @return the resolved {@link GeogigTransaction}, or {@link Optional#absent()} if it could not
 *         be resolved/*from   w  w w  . j  ava 2s  . com*/
 */
@Override
protected Optional<GeogigTransaction> _call() {
    Preconditions.checkState(!(context instanceof GeogigTransaction),
            "Cannot resolve a transaction within a transaction!");
    Preconditions.checkArgument(id != null, "No id was specified to resolve!");

    final String transactionNamespace = TransactionRefDatabase.buildTransactionNamespace(id);

    GeogigTransaction transaction = null;
    if (!context.refDatabase().getAll(transactionNamespace).isEmpty()) {
        transaction = new GeogigTransaction(context, id);
    }

    return Optional.fromNullable(transaction);
}

From source file:com.talvish.tales.services.http.servlets.AdministrationServlet.java

/**
 * Override for initialization to ensure we have a service.
 *///from   w w  w  . j a v a  2 s.  c  o m
@Override
public void init() throws ServletException {
    super.init();
    service = (Service) this.getServletContext().getAttribute(AttributeConstants.SERVICE_SERVLET_CONTEXT);
    Preconditions.checkState(getService() != null, "Must have a service to use administrative servlets.");
}

From source file:org.apache.tez.mapreduce.examples.helpers.SplitsInClientOptionParser.java

public String[] getRemainingArgs() {
    Preconditions.checkState(parsed, "Cannot get remaining args without parsing");
    return otherArgs.clone();
}

From source file:name.marcelomorales.siqisiqi.openjpa.guice.EntityManagerProvider.java

public EntityManager get() {
    if (!isWorking()) {
        begin();//w  w w  . j  av a  2  s . c  o m
    }

    EntityManager em = entityManager.get();
    Preconditions.checkState(null != em, "Requested EntityManager outside work unit.");

    return em;
}

From source file:com.google.enterprise.adaptor.secmgr.saml.GroupImpl.java

@Override
public String getNamespace() {
    Preconditions.checkState(namespace != null, "Namespace must be non-null");
    return namespace;
}

From source file:org.geogit.api.plumbing.RebuildGraphOp.java

/**
 * Executes the {@code RebuildGraphOp} operation.
 * //  ww  w  . j a v  a2s  .c  o  m
 * @return a list of {@link ObjectId}s that were found to be missing or incomplete
 */
@Override
public ImmutableList<ObjectId> call() {
    Preconditions.checkState(!repository.isSparse(), "Cannot rebuild the graph of a sparse repository.");

    List<ObjectId> updated = new LinkedList<ObjectId>();
    ImmutableList<Ref> branches = command(BranchListOp.class).setLocal(true).setRemotes(true).call();

    GraphDatabase graphDb = repository.getGraphDatabase();

    for (Ref ref : branches) {
        Iterator<RevCommit> commits = command(LogOp.class).setUntil(ref.getObjectId()).call();
        while (commits.hasNext()) {
            RevCommit next = commits.next();
            if (graphDb.put(next.getId(), next.getParentIds())) {
                updated.add(next.getId());
            }
        }
    }

    return ImmutableList.copyOf(updated);
}

From source file:com.github.jcustenborder.kafka.connect.cdc.docker.DockerExtension.java

public static DockerCompose findDockerComposeAnnotation(ExtensionContext extensionContext) {
    Class<?> testClass = extensionContext.getTestClass().get();

    log.trace("Looking for DockerCompose extension on {}", testClass.getName());

    DockerCompose dockerCompose = testClass.getAnnotation(DockerCompose.class);
    Preconditions.checkNotNull(dockerCompose, "DockerCompose annotation not found on %s", testClass.getName());
    Preconditions.checkState(!Strings.isNullOrEmpty(dockerCompose.dockerComposePath()),
            "dockerCompose.dockerComposePath() cannot be null or empty.");
    Preconditions.checkState(!Strings.isNullOrEmpty(dockerCompose.logPath()),
            "dockerCompose.logPath() cannot be null or empty.");
    return dockerCompose;
}

From source file:com.turn.griffin.utils.GriffinConsumer.java

public GriffinConsumer(String zkPath, String groupId, String topicRegEx, int consolidationThreadCount,
        Properties props, BlockingQueue<byte[]> msgQueue) {

    Preconditions.checkState(!StringUtils.isBlank(zkPath), "Zookeeper path is not defined");
    Preconditions.checkState(!StringUtils.isBlank(groupId), "Group id is not defined");
    Preconditions.checkState(!StringUtils.isBlank(topicRegEx), "Topic is not defined");
    Preconditions.checkNotNull(msgQueue);

    this.zkPath = zkPath;
    this.groupId = groupId;

    this.consumer = kafka.consumer.Consumer
            .createJavaConsumerConnector(createConsumerConfig(this.zkPath, this.groupId, props));
    Preconditions.checkNotNull(this.consumer);
    this.topicRegEx = topicRegEx;
    this.msgQueue = msgQueue;

    this.run(consolidationThreadCount);
}

From source file:org.apache.druid.sql.calcite.rel.DruidUnionRel.java

public static DruidUnionRel create(final QueryMaker queryMaker, final RelDataType rowType,
        final List<RelNode> rels, final int limit) {
    Preconditions.checkState(rels.size() > 0, "rels must be nonempty");

    return new DruidUnionRel(rels.get(0).getCluster(), rels.get(0).getTraitSet(), queryMaker, rowType,
            new ArrayList<>(rels), limit);
}