java.util.stream.BaseStream Java Examples

The following examples show how to use java.util.stream.BaseStream. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: AbandonedStream.java    From huntbugs with Apache License 2.0 6 votes vote down vote up 
@AstVisitor(nodes=AstNodes.EXPRESSIONS, minVersion=8)
public void visit(Expression expr, MethodContext mc) {
    if(expr.getCode() == AstCode.InvokeInterface) {
        MethodReference mr = (MethodReference) expr.getOperand();
        if(mr.getReturnType().getPackageName().equals("java.util.stream")
                && Types.isBaseStream(mr.getReturnType())) {
            // intermediate stream operation
            if(mc.isAnnotated() && !Inf.BACKLINK.findTransitiveUsages(expr, true).findAny().isPresent()) {
                // .parallel()/.sequential()/.onClose()/.unordered() excluded as may return itself
                if(Types.is(mr.getReturnType(), BaseStream.class)) {
                    mc.report("StreamMethodMayNotReturnItself", 0, expr);
                } else {
                    mc.report("AbandonedStream", 0, expr);
                }
            }
        }
    }
}
Example #2
Source File: TestUtil.java    From hol-streams with Apache License 2.0 6 votes vote down vote up 
/**
 * Tests a stream of any kind against a reference stream of the same type.
 *
 * @param instance from which to extract the stream
 * @param reference stream
 * @param creator to apply when creating a new stream
 * @param collector  to apply to the two streams -> List
 * @param <I> Type of the instance from which streams are obtained
 * @param <T> Elements in the stream
 * @param <S> Stream type, E.g. Stream<String> or IntStream
 */
static <I, T, S extends BaseStream> void tester(
    final I instance,
    final S reference,
    final Function<I, S> creator,
    final Function<S, List<T>> collector
) {
    // Create the stream to test
    final S stream = creator.apply(instance);

    // Make sure that the streams have the same parallel property
    assertEquals(reference.isParallel(), stream.isParallel());

    // Make sure that streams are not reused
    assertNotSame(creator.apply(instance) , stream);

    // Make sure that the streams have the same content
    final List<T> expected = collector.apply(reference);
    final List<T> actual = collector.apply(stream);
    assertEquals(expected, actual);

    printContent(actual);
}
Example #3
Source File: ConcatEngine.java    From jenetics with Apache License 2.0 6 votes vote down vote up 
@Override
public EvolutionStream<G, C>
stream(final Supplier<EvolutionStart<G, C>> start) {
	final AtomicReference<EvolutionStart<G, C>> other =
		new AtomicReference<>(null);

	return new EvolutionStreamImpl<>(
		new ConcatSpliterator<>(
			_engines.stream()
				.map(engine -> engine
					.stream(() -> start(start, other))
					.peek(result -> other.set(result.toEvolutionStart())))
				.map(BaseStream::spliterator)
				.collect(Collectors.toList())
		),
		false
	);
}
Example #4
Source File: BuildableListProperty.java    From FreeBuilder with Apache License 2.0 5 votes vote down vote up 
private void addStreamBuilderAddAll(SourceBuilder code) {
  code.addLine("");
  addJavadocForAddingMultipleBuilders(code);
  code.addLine("public %s %s(%s<? extends %s, ?> elementBuilders) {",
          datatype.getBuilder(),
          addAllBuildersOfMethod(property),
          BaseStream.class,
          element.builderType())
      .addLine("  return %s(elementBuilders.spliterator());", addAllBuildersOfMethod(property))
      .addLine("}");
}
Example #5
Source File: StreamContext.java    From streamex with Apache License 2.0 5 votes vote down vote up 
StreamContext combine(BaseStream<?, ?> other) {
    if (other == null)
        return this;
    StreamContext otherStrategy = of(other);
    StreamContext result = this;
    if (other.isParallel() && !parallel)
        result = parallel();
    if (otherStrategy.closeHandler != null)
        result = result.onClose(otherStrategy.closeHandler);
    return result;
}
Example #6
Source File: BuildableListProperty.java    From FreeBuilder with Apache License 2.0 5 votes vote down vote up 
private void addStreamValueInstanceAddAll(SourceBuilder code) {
  code.addLine("");
  addJavadocForAddingMultipleValues(code);
  code.addLine("public %s %s(%s<? extends %s, ?> elements) {",
          datatype.getBuilder(), addAllMethod(property), BaseStream.class, element.type())
      .addLine("  return %s(elements.spliterator());", addAllMethod(property))
      .addLine("}");
}
Example #7
Source File: MultisetProperty.java    From FreeBuilder with Apache License 2.0 5 votes vote down vote up 
private void addStreamAddAll(SourceBuilder code) {
  addJavadocForAddAll(code);
  code.addLine("public %s %s(%s<? extends %s, ?> elements) {",
          datatype.getBuilder(),
          addAllMethod(property),
          BaseStream.class,
          elementType)
      .addLine("  return %s(elements.spliterator());", addAllMethod(property))
      .addLine("}");
}
Example #8
Source File: SortedMergeIterator.java    From stream-utils with Apache License 2.0 5 votes vote down vote up 
/**
 * Creates a new SortedMerge Iterator.
 *
 * @param streams a list of ordered streams to merge.
 * @param comparator the comparator that all those streams are sorted by.
 */
public SortedMergeIterator(List<Stream<TYPE>> streams, Comparator<TYPE> comparator) {
    // take the full list of streams
    this.iterators = streams.stream()
            // turn them into iterators
            .map(BaseStream::iterator)
            // wrap them in peeking iterators
            .map(PeekingIterator::new)
            // collect that into a list
            .collect(Collectors.toList());
    this.comparator = comparator;
}
Example #9
Source File: SortedSetProperty.java    From FreeBuilder with Apache License 2.0 5 votes vote down vote up 
private void addStreamAddAll(SourceBuilder code) {
  addJavadocForAddAll(code);
  code.addLine("public %s %s(%s<? extends %s, ?> elements) {",
          datatype.getBuilder(),
          addAllMethod(property),
          BaseStream.class,
          elementType)
      .addLine("  return %s(elements.spliterator());", addAllMethod(property))
      .addLine("}");
}
Example #10
Source File: ListProperty.java    From FreeBuilder with Apache License 2.0 5 votes vote down vote up 
private void addStreamAddAll(SourceBuilder code) {
  addJavadocForAddAll(code);
  code.addLine("public %s %s(%s<? extends %s, ?> elements) {",
          datatype.getBuilder(),
          addAllMethod(property),
          BaseStream.class,
          elementType)
      .addLine("  return %s(elements.spliterator());", addAllMethod(property))
      .addLine("}");
}
Example #11
Source File: SetProperty.java    From FreeBuilder with Apache License 2.0 5 votes vote down vote up 
private void addStreamAddAll(SourceBuilder code) {
  addJavadocForAddAll(code);
  code.addLine("public %s %s(%s<? extends %s, ?> elements) {",
          datatype.getBuilder(),
          addAllMethod(property),
          BaseStream.class,
          elementType)
      .addLine("  return %s(elements.spliterator());", addAllMethod(property))
      .addLine("}");
}
Example #12
Source File: ConcatEngine.java    From jenetics with Apache License 2.0 5 votes vote down vote up 
private Collection<Spliterator<EvolutionResult<G, C>>> spliterators(
	final EvolutionInit<G> init,
	final AtomicReference<EvolutionStart<G, C>> other
) {
	final Collection<Spliterator<EvolutionResult<G, C>>> result;
	if (_engines.isEmpty()) {
		result = Collections.emptyList();
	} else if (_engines.size() == 1) {
		result = List.of(
			_engines.get(0)
				.stream(init)
				.peek(er -> other.set(er.toEvolutionStart()))
				.spliterator()
		);
	} else {
		final List<Spliterator<EvolutionResult<G, C>>> concat =
			new ArrayList<>();

		concat.add(
			_engines.get(0)
				.stream(init)
				.peek(er -> other.set(er.toEvolutionStart()))
				.spliterator()
		);
		concat.addAll(
			_engines.subList(1, _engines.size()).stream()
				.map(engine -> engine
					.stream(other::get)
					.peek(er -> other.set(er.toEvolutionStart())))
				.map(BaseStream::spliterator)
				.collect(Collectors.toList())
		);

		result = concat;
	}

	return result;
}
Example #13
Source File: ConcatOpTest.java    From dragonwell8_jdk with GNU General Public License v2.0 4 votes vote down vote up 
void assertSized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertTrue(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertTrue(sp.estimateSize() < Long.MAX_VALUE);
}
Example #14
Source File: ConcatOpTest.java    From jdk8u-dev-jdk with GNU General Public License v2.0 4 votes vote down vote up 
void assertUnsized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertFalse(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertEquals(sp.estimateSize(), Long.MAX_VALUE);
}
Example #15
Source File: ConcatOpTest.java    From jdk8u-jdk with GNU General Public License v2.0 4 votes vote down vote up 
void assertSized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertTrue(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertTrue(sp.estimateSize() < Long.MAX_VALUE);
}
Example #16
Source File: ConcatOpTest.java    From jdk8u-jdk with GNU General Public License v2.0 4 votes vote down vote up 
void assertUnsized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertFalse(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertEquals(sp.estimateSize(), Long.MAX_VALUE);
}
Example #17
Source File: StreamContext.java    From streamex with Apache License 2.0 4 votes vote down vote up 
static StreamContext of(BaseStream<?, ?> stream) {
    if (stream instanceof BaseStreamEx)
        return ((BaseStreamEx<?, ?, ?, ?>) stream).context;
    return new StreamContext(stream.isParallel()).onClose(stream::close);
}
Example #18
Source File: ConcatOpTest.java    From jdk8u-dev-jdk with GNU General Public License v2.0 4 votes vote down vote up 
void assertSized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertTrue(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertTrue(sp.estimateSize() < Long.MAX_VALUE);
}
Example #19
Source File: ConcatOpTest.java    From jdk8u_jdk with GNU General Public License v2.0 4 votes vote down vote up 
void assertSized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertTrue(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertTrue(sp.estimateSize() < Long.MAX_VALUE);
}
Example #20
Source File: ConcatOpTest.java    From jdk8u_jdk with GNU General Public License v2.0 4 votes vote down vote up 
void assertUnsized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertFalse(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertEquals(sp.estimateSize(), Long.MAX_VALUE);
}
Example #21
Source File: ConcatOpTest.java    From openjdk-8 with GNU General Public License v2.0 4 votes vote down vote up 
void assertSized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertTrue(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertTrue(sp.estimateSize() < Long.MAX_VALUE);
}
Example #22
Source File: ConcatOpTest.java    From openjdk-8 with GNU General Public License v2.0 4 votes vote down vote up 
void assertUnsized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertFalse(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertEquals(sp.estimateSize(), Long.MAX_VALUE);
}
Example #23
Source File: ConcatOpTest.java    From openjdk-8-source with GNU General Public License v2.0 4 votes vote down vote up 
void assertUnsized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertFalse(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertEquals(sp.estimateSize(), Long.MAX_VALUE);
}
Example #24
Source File: ConcatOpTest.java    From dragonwell8_jdk with GNU General Public License v2.0 4 votes vote down vote up 
void assertUnsized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertFalse(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertEquals(sp.estimateSize(), Long.MAX_VALUE);
}
Example #25
Source File: ConcatOpTest.java    From TencentKona-8 with GNU General Public License v2.0 4 votes vote down vote up 
void assertUnsized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertFalse(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertEquals(sp.estimateSize(), Long.MAX_VALUE);
}
Example #26
Source File: ConcatOpTest.java    From TencentKona-8 with GNU General Public License v2.0 4 votes vote down vote up 
void assertSized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertTrue(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertTrue(sp.estimateSize() < Long.MAX_VALUE);
}
Example #27
Source File: ConcatOpTest.java    From jdk8u60 with GNU General Public License v2.0 4 votes vote down vote up 
void assertUnsized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertFalse(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertEquals(sp.estimateSize(), Long.MAX_VALUE);
}
Example #28
Source File: ConcatOpTest.java    From jdk8u60 with GNU General Public License v2.0 4 votes vote down vote up 
void assertSized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertTrue(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertTrue(sp.estimateSize() < Long.MAX_VALUE);
}
Example #29
Source File: ConcatOpTest.java    From openjdk-jdk8u with GNU General Public License v2.0 4 votes vote down vote up 
void assertUnsized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertFalse(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertEquals(sp.estimateSize(), Long.MAX_VALUE);
}
Example #30
Source File: ConcatOpTest.java    From openjdk-jdk8u with GNU General Public License v2.0 4 votes vote down vote up 
void assertSized(BaseStream<?, ?> s) {
    Spliterator<?> sp = s.spliterator();

    assertTrue(sp.hasCharacteristics(Spliterator.SIZED | Spliterator.SUBSIZED));
    assertTrue(sp.estimateSize() < Long.MAX_VALUE);
}