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

Introduction

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

Prototype

public static <T> Iterator<T> concat(final Iterator<? extends Iterator<? extends T>> inputs)

Source Link

Document

Combines multiple iterators into a single iterator.

Usage

From source file:org.nickelproject.nickel.collections.InnerNode.java

@Override
public CloseableIterator<T> iterator() {
    return TrivialCloseableIterator
            .create(Iterators.concat(Iterators.transform(Arrays.asList(nodes.get()).iterator(),
                    new Function<DistributedCollection<T>, Iterator<T>>() {
                        @Override
                        public Iterator<T> apply(final DistributedCollection<T> input) {
                            return input.iterator();
                        }//from w w  w  . ja  va  2  s.c om
                    })));
}

From source file:org.fcrepo.kernel.impl.rdf.impl.ChildrenRdfContext.java

private Iterator<Triple> childrenContext() {

    final Iterator<FedoraResource> niceChildren = resource().getChildren();

    return Iterators.concat(Iterators.transform(niceChildren, child2triples()));
}

From source file:org.apache.gobblin.util.request_allocation.GreedyAllocator.java

@Override
protected Iterator<T> getJoinIterator(Iterator<? extends Requestor<T>> requestors,
        final ConcurrentBoundedPriorityIterable<T> requestIterable) {
    Iterator<T> unionIterator = Iterators
            .concat(Iterators.transform(requestors, new Function<Requestor<T>, Iterator<T>>() {
                @Nullable//from   ww  w  .j ava 2s  .c  o m
                @Override
                public Iterator<T> apply(Requestor<T> input) {
                    return input.iterator();
                }
            }));

    return new InterruptibleIterator<>(unionIterator, new Callable<Boolean>() {
        @Override
        public Boolean call() throws Exception {
            return requestIterable.isFull();
        }
    });
}

From source file:sg.atom.utils._beta.functional.FunctionalIterator.java

public <RetType> FunctionalIterator<RetType> transformCat(Function<T, Iterator<RetType>> fn) {
    return new FunctionalIterator<RetType>(Iterators.concat(Iterators.transform(delegate, fn)));
}

From source file:io.crate.operation.join.CollectingPageableTaskIterable.java

@Override
public Iterator<Object[]> iterator() {
    return Iterators.concat(Lists.transform(pages, new Function<Page, Iterator<Object[]>>() {
        @Nullable/* ww w  .  j  a  v a  2s  . c  o  m*/
        @Override
        public Iterator<Object[]> apply(@Nullable Page input) {
            if (input == null) {
                return Collections.emptyIterator();
            } else {
                return input.iterator();
            }
        }
    }).iterator());
}

From source file:org.fcrepo.kernel.impl.rdf.impl.ReferencesRdfContext.java

private Iterator<Triple> putStrongReferencePropertiesIntoContext() throws RepositoryException {
    final Iterator<Property> properties = resource().getNode().getReferences();

    return Iterators.concat(Iterators.transform(properties, property2triple));

}

From source file:org.fcrepo.kernel.impl.rdf.impl.BlankNodeRdfContext.java

/**
 * Default constructor./*from   ww  w  .  j  a  v  a  2s. c  om*/
 *
 * @param resource the resource
 * @param idTranslator the idTranslator
 * @throws javax.jcr.RepositoryException if repository exception occurred
 */
public BlankNodeRdfContext(final FedoraResource resource,
        final IdentifierConverter<Resource, FedoraResource> idTranslator) throws RepositoryException {
    super(resource, idTranslator);

    concat(Iterators.concat(Iterators.transform(getBlankNodesIterator(), new Function<Node, RdfStream>() {
        @Override
        public RdfStream apply(final Node node) {
            final FedoraResource resource = nodeConverter.convert(node);

            return resource.getTriples(idTranslator, ImmutableList.of(TypeRdfContext.class,
                    PropertiesRdfContext.class, BlankNodeRdfContext.class));
        }
    })));

}

From source file:org.jboss.weld.event.GlobalObserverNotifierService.java

private static Iterable<ObserverMethod<?>> createGlobalObserverMethodIterable(
        final Set<BeanManagerImpl> beanManagers) {
    return new Iterable<ObserverMethod<?>>() {
        @Override/*from w ww .j  av  a 2s  .com*/
        public Iterator<ObserverMethod<?>> iterator() {
            Iterator<Iterator<ObserverMethod<?>>> observerMethodIterators = Iterators
                    .transform(beanManagers.iterator(), new BeanManagerToObserverMethodIterable());
            return Iterators.concat(observerMethodIterators);
        }
    };
}

From source file:io.druid.java.util.common.guava.FunctionalIterator.java

public <RetType> FunctionalIterator<RetType> transformCat(Function<T, Iterator<RetType>> fn) {
    return new FunctionalIterator<>(Iterators.concat(Iterators.transform(delegate, fn)));
}

From source file:org.apache.calcite.adapter.elasticsearch.Scrolling.java

/**
 * Combines lazily multiple {@link ElasticsearchJson.Result} into a single iterator of
 * {@link ElasticsearchJson.SearchHit}./*from w w  w.  ja v  a2s.  c  o  m*/
 */
private static Iterator<ElasticsearchJson.SearchHit> flatten(Iterator<ElasticsearchJson.Result> results) {
    final Iterator<Iterator<ElasticsearchJson.SearchHit>> inputs = Iterators.transform(results,
            input -> input.searchHits().hits().iterator());
    return Iterators.concat(inputs);
}