Java Code Examples for java.util.Spliterator#characteristics()

/**
 * Spliterator characteristics are as advertised
 */
public void testSpliterator_characteristics() {
    LinkedBlockingDeque q = new LinkedBlockingDeque();
    Spliterator s = q.spliterator();
    int characteristics = s.characteristics();
    int required = Spliterator.CONCURRENT
        | Spliterator.NONNULL
        | Spliterator.ORDERED;
    assertEquals(required, characteristics & required);
    assertTrue(s.hasCharacteristics(required));
    assertEquals(0, characteristics
                 & (Spliterator.DISTINCT
                    | Spliterator.IMMUTABLE
                    | Spliterator.SORTED));
}
 

/**
 * Spliterator characteristics are as advertised
 */
public void testSpliterator_characteristics() {
    LinkedBlockingQueue q = new LinkedBlockingQueue();
    Spliterator s = q.spliterator();
    int characteristics = s.characteristics();
    int required = Spliterator.CONCURRENT
        | Spliterator.NONNULL
        | Spliterator.ORDERED;
    assertEquals(required, characteristics & required);
    assertTrue(s.hasCharacteristics(required));
    assertEquals(0, characteristics
                 & (Spliterator.DISTINCT
                    | Spliterator.IMMUTABLE
                    | Spliterator.SORTED));
}
 

@Test(dataProvider = "Source")
public <T> void lateBindingTestWithCharacteritics(String description, Supplier<Source<T>> ss) {
    Source<T> source = ss.get();
    Collection<T> c = source.asCollection();
    Spliterator<T> s = c.spliterator();
    s.characteristics();

    Set<T> r = new HashSet<>();
    s.forEachRemaining(r::add);

    assertEquals(r, new HashSet<>(c));
}
 

@Test(dataProvider = "Source")
public <T> void lateBindingTestWithCharacteritics(String description, Supplier<Source<T>> ss) {
    Source<T> source = ss.get();
    Collection<T> c = source.asCollection();
    Spliterator<T> s = c.spliterator();
    s.characteristics();

    Set<T> r = new HashSet<>();
    s.forEachRemaining(r::add);

    assertEquals(r, new HashSet<>(c));
}
 

@Test(dataProvider = "Source.Non.Binding.Characteristics")
public <T> void testCharacteristics(String description, Supplier<Source<T>> ss) {
    Source<T> source = ss.get();
    Spliterator<T> s = source.spliterator();

    s.characteristics();
    source.update();

    Set<T> a = new HashSet<>();
    s.forEachRemaining(a::add);

    Set<T> e = new HashSet<>();
    source.spliterator().forEachRemaining(e::add);
    assertEquals(a, e);
}
 

@Test(dataProvider = "Source")
public <T> void lateBindingTestWithCharacteritics(String description, Supplier<Source<T>> ss) {
    Source<T> source = ss.get();
    Collection<T> c = source.asCollection();
    Spliterator<T> s = c.spliterator();
    s.characteristics();

    Set<T> r = new HashSet<>();
    s.forEachRemaining(r::add);

    assertEquals(r, new HashSet<>(c));
}
 

@Test(dataProvider = "Source")
public <T> void lateBindingTestWithCharacteritics(String description, Supplier<Source<T>> ss) {
    Source<T> source = ss.get();
    Collection<T> c = source.asCollection();
    Spliterator<T> s = c.spliterator();
    s.characteristics();

    Set<T> r = new HashSet<>();
    s.forEachRemaining(r::add);

    assertEquals(r, new HashSet<>(c));
}
 

SplitNode(Consumer<T> c, Spliterator<T> s) {
    this(c, s.characteristics(), s);
}
 

SplitNode(Consumer<T> c, Spliterator<T> s) {
    this(c, s.characteristics(), s);
}
 

SplitNode(Consumer<T> c, Spliterator<T> s) {
    this(c, s.characteristics(), s);
}
 

SplitNode(Consumer<T> c, Spliterator<T> s) {
    this(c, s.characteristics(), s);
}
 

SplitNode(Consumer<T> c, Spliterator<T> s) {
    this(c, s.characteristics(), s);
}
 

SplitNode(Consumer<T> c, Spliterator<T> s) {
    this(c, s.characteristics(), s);
}
 

SplitNode(Consumer<T> c, Spliterator<T> s) {
    this(c, s.characteristics(), s);
}
 

SplitNode(Consumer<T> c, Spliterator<T> s) {
    this(c, s.characteristics(), s);
}
 

SplitNode(Consumer<T> c, Spliterator<T> s) {
    this(c, s.characteristics(), s);
}
 

/**
 * Converts a spliterator characteristic bit set to stream flags.
 *
 * @implSpec
 * If the spliterator is naturally {@code SORTED} (the associated
 * {@code Comparator} is {@code null}) then the characteristic is converted
 * to the {@link #SORTED} flag, otherwise the characteristic is not
 * converted.
 *
 * @param spliterator the spliterator from which to obtain characteristic
 *        bit set.
 * @return the stream flags.
 */
static int fromCharacteristics(Spliterator<?> spliterator) {
    int characteristics = spliterator.characteristics();
    if ((characteristics & Spliterator.SORTED) != 0 && spliterator.getComparator() != null) {
        // Do not propagate the SORTED characteristic if it does not correspond
        // to a natural sort order
        return characteristics & SPLITERATOR_CHARACTERISTICS_MASK & ~Spliterator.SORTED;
    }
    else {
        return characteristics & SPLITERATOR_CHARACTERISTICS_MASK;
    }
}
 

/**
 * Converts a spliterator characteristic bit set to stream flags.
 *
 * @implSpec
 * If the spliterator is naturally {@code SORTED} (the associated
 * {@code Comparator} is {@code null}) then the characteristic is converted
 * to the {@link #SORTED} flag, otherwise the characteristic is not
 * converted.
 *
 * @param spliterator the spliterator from which to obtain characteristic
 *        bit set.
 * @return the stream flags.
 */
static int fromCharacteristics(Spliterator<?> spliterator) {
    int characteristics = spliterator.characteristics();
    if ((characteristics & Spliterator.SORTED) != 0 && spliterator.getComparator() != null) {
        // Do not propagate the SORTED characteristic if it does not correspond
        // to a natural sort order
        return characteristics & SPLITERATOR_CHARACTERISTICS_MASK & ~Spliterator.SORTED;
    }
    else {
        return characteristics & SPLITERATOR_CHARACTERISTICS_MASK;
    }
}
 

/**
 * Converts a spliterator characteristic bit set to stream flags.
 *
 * @implSpec
 * If the spliterator is naturally {@code SORTED} (the associated
 * {@code Comparator} is {@code null}) then the characteristic is converted
 * to the {@link #SORTED} flag, otherwise the characteristic is not
 * converted.
 *
 * @param spliterator the spliterator from which to obtain characteristic
 *        bit set.
 * @return the stream flags.
 */
static int fromCharacteristics(Spliterator<?> spliterator) {
    int characteristics = spliterator.characteristics();
    if ((characteristics & Spliterator.SORTED) != 0 && spliterator.getComparator() != null) {
        // Do not propagate the SORTED characteristic if it does not correspond
        // to a natural sort order
        return characteristics & SPLITERATOR_CHARACTERISTICS_MASK & ~Spliterator.SORTED;
    }
    else {
        return characteristics & SPLITERATOR_CHARACTERISTICS_MASK;
    }
}
 

/**
 * Converts a spliterator characteristic bit set to stream flags.
 *
 * @implSpec
 * If the spliterator is naturally {@code SORTED} (the associated
 * {@code Comparator} is {@code null}) then the characteristic is converted
 * to the {@link #SORTED} flag, otherwise the characteristic is not
 * converted.
 *
 * @param spliterator the spliterator from which to obtain characteristic
 *        bit set.
 * @return the stream flags.
 */
static int fromCharacteristics(Spliterator<?> spliterator) {
    int characteristics = spliterator.characteristics();
    if ((characteristics & Spliterator.SORTED) != 0 && spliterator.getComparator() != null) {
        // Do not propagate the SORTED characteristic if it does not correspond
        // to a natural sort order
        return characteristics & SPLITERATOR_CHARACTERISTICS_MASK & ~Spliterator.SORTED;
    }
    else {
        return characteristics & SPLITERATOR_CHARACTERISTICS_MASK;
    }
}