Examples with Spliterator java8.util.Spliterator used on opensource projects

Example 6 with Spliterator

use of java8.util.Spliterator in project streamsupport by stefan-zobel.

the class Spliterators method iterator.

/**
 * Creates an {@code PrimitiveIterator.OfDouble} from a
 * {@code Spliterator.OfDouble}.
 *
 * <p>Traversal of elements should be accomplished through the iterator.
 * The behaviour of traversal is undefined if the spliterator is operated
 * after the iterator is returned.
 *
 * @param spliterator The spliterator
 * @return An iterator
 * @throws NullPointerException if the given spliterator is {@code null}
 */
public static PrimitiveIterator.OfDouble iterator(Spliterator.OfDouble spliterator) {
    Objects.requireNonNull(spliterator);
    class Adapter implements PrimitiveIterator.OfDouble, DoubleConsumer {

        boolean valueReady = false;

        double nextElement;

        @Override
        public void accept(double t) {
            valueReady = true;
            nextElement = t;
        }

        @Override
        public boolean hasNext() {
            if (!valueReady)
                spliterator.tryAdvance(this);
            return valueReady;
        }

        @Override
        public double nextDouble() {
            if (!valueReady && !hasNext())
                throw new NoSuchElementException();
            else {
                valueReady = false;
                return nextElement;
            }
        }

        @Override
        public Double next() {
            return nextDouble();
        }

        @Override
        public void forEachRemaining(DoubleConsumer action) {
            Iterators.forEachRemaining(this, action);
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException("remove");
        }
    }
    return new Adapter();
}

Example 7 with Spliterator

use of java8.util.Spliterator in project streamsupport by stefan-zobel.

the class Spliterators method iterator.

/**
 * Creates an {@code PrimitiveIterator.OfLong} from a
 * {@code Spliterator.OfLong}.
 *
 * <p>Traversal of elements should be accomplished through the iterator.
 * The behaviour of traversal is undefined if the spliterator is operated
 * after the iterator is returned.
 *
 * @param spliterator The spliterator
 * @return An iterator
 * @throws NullPointerException if the given spliterator is {@code null}
 */
public static PrimitiveIterator.OfLong iterator(Spliterator.OfLong spliterator) {
    Objects.requireNonNull(spliterator);
    class Adapter implements PrimitiveIterator.OfLong, LongConsumer {

        boolean valueReady = false;

        long nextElement;

        @Override
        public void accept(long t) {
            valueReady = true;
            nextElement = t;
        }

        @Override
        public boolean hasNext() {
            if (!valueReady)
                spliterator.tryAdvance(this);
            return valueReady;
        }

        @Override
        public long nextLong() {
            if (!valueReady && !hasNext())
                throw new NoSuchElementException();
            else {
                valueReady = false;
                return nextElement;
            }
        }

        @Override
        public Long next() {
            return nextLong();
        }

        @Override
        public void forEachRemaining(LongConsumer action) {
            Iterators.forEachRemaining(this, action);
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException("remove");
        }
    }
    return new Adapter();
}

Example 8 with Spliterator

use of java8.util.Spliterator in project streamsupport by stefan-zobel.

the class Spliterators method iterator.

/**
 * Creates an {@code PrimitiveIterator.OfInt} from a
 * {@code Spliterator.OfInt}.
 *
 * <p>Traversal of elements should be accomplished through the iterator.
 * The behaviour of traversal is undefined if the spliterator is operated
 * after the iterator is returned.
 *
 * @param spliterator The spliterator
 * @return An iterator
 * @throws NullPointerException if the given spliterator is {@code null}
 */
public static PrimitiveIterator.OfInt iterator(Spliterator.OfInt spliterator) {
    Objects.requireNonNull(spliterator);
    class Adapter implements PrimitiveIterator.OfInt, IntConsumer {

        boolean valueReady = false;

        int nextElement;

        @Override
        public void accept(int t) {
            valueReady = true;
            nextElement = t;
        }

        @Override
        public boolean hasNext() {
            if (!valueReady)
                spliterator.tryAdvance(this);
            return valueReady;
        }

        @Override
        public int nextInt() {
            if (!valueReady && !hasNext())
                throw new NoSuchElementException();
            else {
                valueReady = false;
                return nextElement;
            }
        }

        @Override
        public Integer next() {
            return nextInt();
        }

        @Override
        public void forEachRemaining(IntConsumer action) {
            Iterators.forEachRemaining(this, action);
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException("remove");
        }
    }
    return new Adapter();
}

Example 9 with Spliterator

use of java8.util.Spliterator in project streamsupport by stefan-zobel.

the class IntPipeline method forEachWithCancel.

@Override
final boolean forEachWithCancel(Spliterator<Integer> spliterator, Sink<Integer> sink) {
    Spliterator.OfInt spl = adapt(spliterator);
    IntConsumer adaptedSink = adapt(sink);
    boolean cancelled;
    do {
    } while (!(cancelled = sink.cancellationRequested()) && spl.tryAdvance(adaptedSink));
    return cancelled;
}

Example 10 with Spliterator

use of java8.util.Spliterator in project streamsupport by stefan-zobel.

the class LongPipeline method forEachWithCancel.

@Override
final boolean forEachWithCancel(Spliterator<Long> spliterator, Sink<Long> sink) {
    Spliterator.OfLong spl = adapt(spliterator);
    LongConsumer adaptedSink = adapt(sink);
    boolean cancelled;
    do {
    } while (!(cancelled = sink.cancellationRequested()) && spl.tryAdvance(adaptedSink));
    return cancelled;
}