Examples with Stream java8.util.stream.Stream used on opensource projects

Example 26 with Stream

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

the class ConcatTest method assertDoubleConcat.

private void assertDoubleConcat(Stream<Integer> s1, Stream<Integer> s2, boolean parallel, boolean ordered) {
    DoubleStream result = DoubleStreams.concat(s1.mapToDouble(Integer::doubleValue), s2.mapToDouble(Integer::doubleValue));
    assertEquals(result.isParallel(), parallel);
    assertConcatContent(result.spliterator(), ordered, StreamSupport.stream(expected).mapToDouble(Integer::doubleValue).spliterator());
}

Example 27 with Stream

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

the class ConcatTest method assertIntConcat.

private void assertIntConcat(Stream<Integer> s1, Stream<Integer> s2, boolean parallel, boolean ordered) {
    IntStream result = IntStreams.concat(s1.mapToInt(Integer::intValue), s2.mapToInt(Integer::intValue));
    assertEquals(result.isParallel(), parallel);
    assertConcatContent(result.spliterator(), ordered, StreamSupport.stream(expected).mapToInt(Integer::intValue).spliterator());
}

Example 28 with Stream

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

the class FlatMapOpTest method testClose.

@Test
public void testClose() {
    AtomicInteger before = new AtomicInteger();
    AtomicInteger onClose = new AtomicInteger();
    Supplier<Stream<Integer>> s = () -> {
        before.set(0);
        onClose.set(0);
        return RefStreams.of(1, 2).peek(e -> before.getAndIncrement());
    };
    s.get().flatMap(i -> RefStreams.of(i, i).onClose(onClose::getAndIncrement)).count();
    assertEquals(before.get(), onClose.get());
    s.get().flatMapToInt(i -> IntStreams.of(i, i).onClose(onClose::getAndIncrement)).count();
    assertEquals(before.get(), onClose.get());
    s.get().flatMapToLong(i -> LongStreams.of(i, i).onClose(onClose::getAndIncrement)).count();
    assertEquals(before.get(), onClose.get());
    s.get().flatMapToDouble(i -> DoubleStreams.of(i, i).onClose(onClose::getAndIncrement)).count();
    assertEquals(before.get(), onClose.get());
}

Example 29 with Stream

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

the class SplittableRandomTest method longsDataProvider.

@DataProvider(name = "longs")
public static Object[][] longsDataProvider() {
    List<Object[]> data = new ArrayList<>();
    // Function to create a stream using a RandomBoxedSpliterator
    Function<Function<SplittableRandom, Long>, LongStream> rbsf = sf -> StreamSupport.stream(new RandomBoxedSpliterator<>(new SplittableRandom(), 0, SIZE, sf), false).mapToLong(i -> i);
    // Unbounded
    data.add(new Object[] { TestData.Factory.ofLongSupplier(String.format("new SplittableRandom().longs().limit(%d)", SIZE), () -> new SplittableRandom().longs().limit(SIZE)), randomAsserter(SIZE, Long.MAX_VALUE, 0L) });
    data.add(new Object[] { TestData.Factory.ofLongSupplier(String.format("new SplittableRandom().longs(%d)", SIZE), () -> new SplittableRandom().longs(SIZE)), randomAsserter(SIZE, Long.MAX_VALUE, 0L) });
    data.add(new Object[] { TestData.Factory.ofLongSupplier(String.format("new RandomBoxedSpliterator(0, %d, sr -> sr.nextLong())", SIZE), () -> rbsf.apply(sr -> sr.nextLong())), randomAsserter(SIZE, Long.MAX_VALUE, 0L) });
    for (int b : BOUNDS) {
        for (int o : ORIGINS) {
            final long origin = o;
            final long bound = b;
            data.add(new Object[] { TestData.Factory.ofLongSupplier(String.format("new SplittableRandom().longs(%d, %d).limit(%d)", origin, bound, SIZE), () -> new SplittableRandom().longs(origin, bound).limit(SIZE)), randomAsserter(SIZE, origin, bound) });
            data.add(new Object[] { TestData.Factory.ofLongSupplier(String.format("new SplittableRandom().longs(%d, %d, %d)", SIZE, origin, bound), () -> new SplittableRandom().longs(SIZE, origin, bound)), randomAsserter(SIZE, origin, bound) });
            if (origin == 0) {
                data.add(new Object[] { TestData.Factory.ofLongSupplier(String.format("new RandomBoxedSpliterator(0, %d, sr -> sr.nextLong(%d))", SIZE, bound), () -> rbsf.apply(sr -> sr.nextLong(bound))), randomAsserter(SIZE, origin, bound) });
            }
            data.add(new Object[] { TestData.Factory.ofLongSupplier(String.format("new RandomBoxedSpliterator(0, %d, sr -> sr.nextLong(%d, %d))", SIZE, origin, bound), () -> rbsf.apply(sr -> sr.nextLong(origin, bound))), randomAsserter(SIZE, origin, bound) });
        }
    }
    return data.toArray(new Object[0][]);
}

Example 30 with Stream

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

the class SplittableRandomTest method doublesDataProvider.

@DataProvider(name = "doubles")
public static Object[][] doublesDataProvider() {
    List<Object[]> data = new ArrayList<>();
    // Function to create a stream using a RandomBoxedSpliterator
    Function<Function<SplittableRandom, Double>, DoubleStream> rbsf = sf -> StreamSupport.stream(new RandomBoxedSpliterator<>(new SplittableRandom(), 0, SIZE, sf), false).mapToDouble(i -> i);
    // Unbounded
    data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new SplittableRandom().doubles().limit(%d)", SIZE), () -> new SplittableRandom().doubles().limit(SIZE)), randomAsserter(SIZE, Double.MAX_VALUE, 0d) });
    data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new SplittableRandom().doubles(%d)", SIZE), () -> new SplittableRandom().doubles(SIZE)), randomAsserter(SIZE, Double.MAX_VALUE, 0d) });
    data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new RandomBoxedSpliterator(0, %d, sr -> sr.nextDouble())", SIZE), () -> rbsf.apply(sr -> sr.nextDouble())), randomAsserter(SIZE, Double.MAX_VALUE, 0d) });
    for (int b : BOUNDS) {
        for (int o : ORIGINS) {
            final double origin = o;
            final double bound = b;
            data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new SplittableRandom().doubles(%f, %f).limit(%d)", origin, bound, SIZE), () -> new SplittableRandom().doubles(origin, bound).limit(SIZE)), randomAsserter(SIZE, origin, bound) });
            data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new SplittableRandom().doubles(%d, %f, %f)", SIZE, origin, bound), () -> new SplittableRandom().doubles(SIZE, origin, bound)), randomAsserter(SIZE, origin, bound) });
            if (origin == 0) {
                data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new RandomBoxedSpliterator(0, %d, sr -> sr.nextDouble(%f))", SIZE, bound), () -> rbsf.apply(sr -> sr.nextDouble(bound))), randomAsserter(SIZE, origin, bound) });
            }
            data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new RandomBoxedSpliterator(0, %d, sr -> sr.nextDouble(%f, %f))", SIZE, origin, bound), () -> rbsf.apply(sr -> sr.nextDouble(origin, bound))), randomAsserter(SIZE, origin, bound) });
        }
    }
    return data.toArray(new Object[0][]);
}