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

Introduction

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

Prototype

public static <F, T> Iterator<T> transform(final Iterator<F> fromIterator,
        final Function<? super F, ? extends T> function)

Source Link

Document

Returns an iterator that applies function to each element of fromIterator .

Usage

From source file:nz.ac.massey.cs.guery.adapters.blueprints.BlueprintsAdapter.java

@Override
public Iterator<Edge> getEdges() {
    return Iterators.transform(g.getEdges().iterator(), this.edgeCaching);
}

From source file:com.moz.fiji.schema.impl.FijiResultRowScanner.java

/**
 * Constructor for {@code FijiResultRowScanner}.
 *
 * @param layout The {@code FijiTableLayout} for the table.
 * @param resultScanner The {@code FijiResultScanner} backing this {@code FijiRowScanner}. This
 * {@code FijiResultScanner} is owned by the newly created {@code FijiResultRowScanner} and
 * calling close on this {@code FijiResultRowScanner} will close the underlying
 * {@code FijiResultScanner}./*  w ww. j a  v  a2s  .  c om*/
 */
public FijiResultRowScanner(final FijiTableLayout layout, final FijiResultScanner<Object> resultScanner) {
    mLayout = layout;
    mResultScanner = resultScanner;
    mResultRowScanner = Iterators.transform(resultScanner, new Function<FijiResult<Object>, FijiRowData>() {
        @Override
        public FijiRowData apply(final FijiResult<Object> result) {
            return new FijiResultRowData(mLayout, result);
        }
    });
}

From source file:controllers.DocumentsController.java

public static Result get(final UUID collection, String document) {
    JsonNode documentNode = Json.parse(document);
    if (documentNode.isTextual()) {
        document = String.format("[%s]", document);
        documentNode = Json.parse(document);
    }/*from   w  ww .  ja va  2 s .  c o  m*/

    if (documentNode.isArray()) {
        Iterator<ViewModel> documents = Iterators.transform(documentNode.getElements(),
                new Function<JsonNode, ViewModel>() {
                    @Override
                    @Nullable
                    public ViewModel apply(@Nullable JsonNode input) {
                        if (!input.isTextual()) {
                            throw new IllegalArgumentException();
                        }
                        return createViewModel(fetchDocument(collection, UuidUtils.create(input.asText())));
                    }
                });

        return ok(Json
                .toJson(Iterators.toArray(Iterators.filter(documents, Predicates.notNull()), ViewModel.class)));
    }

    throw new IllegalArgumentException();
}

From source file:org.trancecode.concurrent.ParallelIterators.java

/**
 * @see Iterators#transform(Iterator, Function)
 *///from  w w  w.ja va2  s  .c  o  m
public static <F, T> Iterator<T> transform(final Iterator<F> fromIterable,
        final Function<? super F, ? extends T> function, final ExecutorService executor) {
    final Function<F, Callable<T>> applyFunction = CallableFunctions.apply(function);
    final Iterator<Callable<T>> callables = Iterators.transform(fromIterable, applyFunction);

    final AtomicReference<Future<?>> submitTask = new AtomicReference<>();

    final BlockingQueue<Future<T>> futures = new ArrayBlockingQueue<>(MAXIMUM_NUMBER_OF_ELEMENTS_IN_ADVANCE);
    final Function<Callable<T>, Future<T>> submitFunction = task -> executor.submit(() -> {
        try {
            return task.call();
        } catch (final Exception e) {
            final Future<?> taskToCancel = submitTask.get();
            if (taskToCancel != null) {
                taskToCancel.cancel(true);
                final Future<T> last = last();
                futures.add(last);
            }
            throw e;
        }
    });

    submitTask.set(executor.submit(() -> {
        Iterators.addAll(futures, Iterators.transform(callables, submitFunction));
        final Future<T> last = last();
        futures.add(last);
    }));

    return TcIterators.handleErrors(getUntilLast(TcIterators.removeAll(futures)), error -> {
        TcFutures.cancel(futures);
        return null;
    });
}

From source file:com.addthis.bundle.value.BundleValueMap.java

@Override
public Iterator<ValueMapEntry> iterator() {
    return Iterators.transform(bundle.iterator(), field -> new ValueMapEntry() {
        @Override/*  w  w  w  . ja v  a2 s  .  co m*/
        public String getKey() {
            return field.getName();
        }

        @Override
        public ValueObject getValue() {
            return bundle.getValue(field);
        }

        @Override
        public ValueObject setValue(ValueObject value) {
            ValueObject previousValue = bundle.getValue(field);
            bundle.setValue(field, value);
            return previousValue;
        }
    });
}

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

private static Iterable<ObserverMethod<?>> createGlobalObserverMethodIterable(
        final Set<BeanManagerImpl> beanManagers) {
    return new Iterable<ObserverMethod<?>>() {
        @Override// w  w  w . ja  va  2  s .  co m
        public Iterator<ObserverMethod<?>> iterator() {
            Iterator<Iterator<ObserverMethod<?>>> observerMethodIterators = Iterators
                    .transform(beanManagers.iterator(), new BeanManagerToObserverMethodIterable());
            return Iterators.concat(observerMethodIterators);
        }
    };
}

From source file:com.boundlessgeo.geoserver.json.JSONArr.java

/**
 * Returns an iterator over the array.// www  . ja v  a2 s  .  c  o m
 * <p>
 * JSON objects are wrapped upon return, primitives are returned as is.
 * </p>
 */
@Override
public Iterator<Object> iterator() {
    return Iterators.transform(raw.iterator(), new Function<Object, Object>() {
        @Nullable
        @Override
        public Object apply(@Nullable Object o) {
            return JSONWrapper.wrapOrSelf(o);
        }
    });
}

From source file:edu.cmu.lti.oaqa.framework.collection.fs.DirCollectionReader.java

@Override
protected Iterator<DataElement> getInputSet() throws ResourceInitializationException {
    String filename = System.getProperty(DIR_PROPERTY);
    try {/*from   w w w  .  j a v a  2s .  co  m*/
        if (filename == null) {
            Iterator<Resource> files = getFilesFromParams();
            return iterator(files);
        } else {
            File file = new File(filename);
            String[] files = file.list();
            return iterator(Iterators.transform(Iterators.forArray(files), new StringToResourceFunction("")));
        }
    } catch (IOException e) {
        throw new ResourceInitializationException(e);
    }
}

From source file:org.apache.fluo.recipes.core.combine.InputImpl.java

@Override
public Iterator<V> iterator() {
    Iterator<Bytes> bytesIter = valuesCollection.iterator();
    if (currentValue != null) {
        bytesIter = Iterators.concat(bytesIter, Iterators.singletonIterator(currentValue));
    }//from   w  w  w . java 2s  . c om
    return Iterators.transform(bytesIter, valDeser::apply);
}

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/* w ww.j  a  va2s.  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();
        }
    });
}