Example usage for com.google.common.collect Iterators singletonIterator

Introduction

In this page you can find the example usage for com.google.common.collect Iterators singletonIterator.

Prototype

public static <T> UnmodifiableIterator<T> singletonIterator(@Nullable final T value)

Source Link

Document

Returns an iterator containing only value .

Usage

From source file:us.askplatyp.kb.lucene.lucene.sparql.LuceneTripleSource.java

private CloseableIteration<Statement, QueryEvaluationException> getStatementsForPredicateObject(IRI pred,
        Value obj) throws IOException {
    return new QueryIteration(index.getReader(), new TermQuery(termForPredicateObject(pred, obj)), //TODO: better query?
            document -> Iterators
                    .singletonIterator(VALUE_FACTORY.createStatement(getIRIFromDocument(document), pred, obj)),
            Collections.singleton("@id"));
}

From source file:org.ow2.authzforce.core.pdp.impl.policy.FlattenedPolicyTree.java

/**
 * The first element is the root policy in the tree, then, if any (e.g. the root policy is a XACML PolicySet enclosing Policy(Set)IdReferences), come the policies referenced from it. (This assumes
 * that all policy references, e.g. Policy(Set)IdReferences, have been statically resolved.)
 *//* w  w w . j a v a2  s.com*/
@Override
public Iterator<PrimaryPolicyMetadata> iterator() {
    final Iterator<PrimaryPolicyMetadata> rootPolicyIterator = Iterators
            .singletonIterator(this.immutableRootPolicyMetadata);
    return immutableRootPolicyRefsMetadata.isPresent()
            ? Iterators.concat(rootPolicyIterator,
                    this.immutableRootPolicyRefsMetadata.get().getRefPolicies().iterator())
            : rootPolicyIterator;
}

From source file:org.apache.jackrabbit.oak.security.user.UserPrincipalProvider.java

@Nonnull
@Override/*from   www .  j a v  a2 s  . c o m*/
public Iterator<? extends Principal> findPrincipals(final String nameHint, final int searchType) {
    try {
        AuthorizableType type = AuthorizableType.getType(searchType);
        StringBuilder statement = new StringBuilder()
                .append(QueryUtil.getSearchRoot(type, config.getParameters())).append("//element(*,")
                .append(QueryUtil.getNodeTypeName(type)).append(')').append("[jcr:like(@rep:principalName,'")
                .append(buildSearchPattern(nameHint)).append("')]");

        Result result = root.getQueryEngine().executeQuery(statement.toString(), javax.jcr.query.Query.XPATH,
                NO_BINDINGS, namePathMapper.getSessionLocalMappings());

        Iterator<Principal> principals = Iterators.filter(
                Iterators.transform(result.getRows().iterator(), new ResultRowToPrincipal()),
                Predicates.notNull());

        if (matchesEveryone(nameHint, searchType)) {
            principals = Iterators.concat(principals,
                    Iterators.singletonIterator(EveryonePrincipal.getInstance()));
            return Iterators.filter(principals, new EveryonePredicate());
        } else {
            return principals;
        }
    } catch (ParseException e) {
        log.debug(e.getMessage());
        return Iterators.emptyIterator();
    }
}

From source file:org.geogit.api.plumbing.diff.TreeDiffEntryIterator.java

private Iterator<DiffEntry> addRemoveAll(@Nullable final NodeRef treeRef, final RevTree tree,
        final ChangeType changeType) {
    DepthTreeIterator treeIterator;/*from  w ww . j  ava  2  s .co  m*/

    final String path = treeRef == null ? "" : treeRef.path();
    final ObjectId metadataId = treeRef == null ? ObjectId.NULL : treeRef.getMetadataId();

    treeIterator = new DepthTreeIterator(path, metadataId, tree, objectDb, strategy);

    Iterator<DiffEntry> iterator;

    iterator = Iterators.transform(treeIterator, new RefToDiffEntry(changeType));

    if (reportTrees && !NodeRef.ROOT.equals(path)) {
        NodeRef oldTreeRef = ChangeType.ADDED.equals(changeType) ? null : treeRef;
        NodeRef newTreeRef = ChangeType.ADDED.equals(changeType) ? treeRef : null;
        DiffEntry treeEntry = new DiffEntry(oldTreeRef, newTreeRef);
        iterator = Iterators.concat(Iterators.singletonIterator(treeEntry), iterator);
    }
    return iterator;
}

From source file:mvm.rya.accumulo.AccumuloRyaDAO.java

@Override
public void add(RyaStatement statement) throws RyaDAOException {
    commit(Iterators.singletonIterator(statement));
}

From source file:com.indeed.lsmtree.recordcache.StandalonePersistentRecordCache.java

public Iterator<Either<Exception, P2<K, V>>> getStreaming(Iterator<K> keys, AtomicInteger progress,
        AtomicInteger skipped) {//w w  w .  ja  va2 s . co  m
    log.info("starting store lookups");
    final List<Either<Exception, P2<K, V>>> ret = Lists.newArrayList();
    int notFound = 0;
    while (keys.hasNext()) {
        final K key = keys.next();
        final V value;
        try {
            value = index.get(key);
        } catch (IOException e) {
            log.error("error", e);
            return Iterators.singletonIterator(Left.<Exception, P2<K, V>>of(new IndexReadException(e)));
        }
        if (value != null) {
            ret.add(Right.<Exception, P2<K, V>>of(P.p(key, value)));
        } else {
            notFound++;
        }
    }
    if (progress != null)
        progress.addAndGet(notFound);
    if (skipped != null)
        skipped.addAndGet(notFound);
    log.info("store lookups complete");

    return ret.iterator();
}

From source file:org.apache.rya.accumulo.AccumuloRyaDAO.java

@Override
public void add(final RyaStatement statement) throws RyaDAOException {
    commit(Iterators.singletonIterator(statement));
}

From source file:org.obm.push.calendar.CalendarBackend.java

@Override
public BackendFolders getBackendFolders(final UserDataRequest udr) {
    return new BackendFolders() {

        @Override/*  ww  w. j  a  v a 2 s .  c o m*/
        public Iterator<BackendFolder> iterator() {
            return Iterators.singletonIterator(defaultCalendar(udr));
        }
    };
}

From source file:mvm.rya.accumulo.AccumuloRyaDAO.java

@Override
public void delete(RyaStatement stmt, AccumuloRdfConfiguration aconf) throws RyaDAOException {
    this.delete(Iterators.singletonIterator(stmt), aconf);
}

From source file:org.apache.rya.accumulo.AccumuloRyaDAO.java

@Override
public void delete(final RyaStatement stmt, final AccumuloRdfConfiguration aconf) throws RyaDAOException {
    this.delete(Iterators.singletonIterator(stmt), aconf);
}