/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* questions.
*/
package java.util.stream;
import org.testng.annotations.Test;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Deque;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Spliterator;
import java.util.function.*;
import static org.testng.Assert.*;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.fail;
/**
* Assertion methods for spliterators, to be called from other tests
*/
public class SpliteratorTestHelper {
public interface ContentAsserter<T> {
void assertContents(Collection<T> actual, Collection<T> expected, boolean isOrdered);
}
private static ContentAsserter<Object> DEFAULT_CONTENT_ASSERTER
= SpliteratorTestHelper::assertContents;
@SuppressWarnings("unchecked")
private static <T> ContentAsserter<T> defaultContentAsserter() {
return (ContentAsserter<T>) DEFAULT_CONTENT_ASSERTER;
}
public static void testSpliterator(Supplier<Spliterator<Integer>> supplier) {
testSpliterator(supplier, defaultContentAsserter());
}
public static void testSpliterator(Supplier<Spliterator<Integer>> supplier,
ContentAsserter<Integer> asserter) {
testSpliterator(supplier, (Consumer<Integer> b) -> b, asserter);
}
public static void testIntSpliterator(Supplier<Spliterator.OfInt> supplier) {
testIntSpliterator(supplier, defaultContentAsserter());
}
public static void testIntSpliterator(Supplier<Spliterator.OfInt> supplier,
ContentAsserter<Integer> asserter) {
class BoxingAdapter implements Consumer<Integer>, IntConsumer {
private final Consumer<Integer> b;
BoxingAdapter(Consumer<Integer> b) {
this.b = b;
}
@Override
public void accept(Integer value) {
throw new IllegalStateException();
}
@Override
public void accept(int value) {
b.accept(value);
}
}
testSpliterator(supplier, BoxingAdapter::new, asserter);
}
public static void testLongSpliterator(Supplier<Spliterator.OfLong> supplier) {
testLongSpliterator(supplier, defaultContentAsserter());
}
public static void testLongSpliterator(Supplier<Spliterator.OfLong> supplier,
ContentAsserter<Long> asserter) {
class BoxingAdapter implements Consumer<Long>, LongConsumer {
private final Consumer<Long> b;
BoxingAdapter(Consumer<Long> b) {
this.b = b;
}
@Override
public void accept(Long value) {
throw new IllegalStateException();
}
@Override
public void accept(long value) {
b.accept(value);
}
}
testSpliterator(supplier, BoxingAdapter::new, asserter);
}
public static void testDoubleSpliterator(Supplier<Spliterator.OfDouble> supplier) {
testDoubleSpliterator(supplier, defaultContentAsserter());
}
public static void testDoubleSpliterator(Supplier<Spliterator.OfDouble> supplier,
ContentAsserter<Double> asserter) {
class BoxingAdapter implements Consumer<Double>, DoubleConsumer {
private final Consumer<Double> b;
BoxingAdapter(Consumer<Double> b) {
this.b = b;
}
@Override
public void accept(Double value) {
throw new IllegalStateException();
}
@Override
public void accept(double value) {
b.accept(value);
}
}
testSpliterator(supplier, BoxingAdapter::new, asserter);
}
static <T, S extends Spliterator<T>> void testSpliterator(Supplier<S> supplier,
UnaryOperator<Consumer<T>> boxingAdapter,
ContentAsserter<T> asserter) {
ArrayList<T> fromForEach = new ArrayList<>();
Spliterator<T> spliterator = supplier.get();
Consumer<T> addToFromForEach = boxingAdapter.apply(fromForEach::add);
spliterator.forEachRemaining(addToFromForEach);
Collection<T> exp = Collections.unmodifiableList(fromForEach);
testNullPointerException(supplier);
testForEach(exp, supplier, boxingAdapter, asserter);
testTryAdvance(exp, supplier, boxingAdapter, asserter);
testMixedTryAdvanceForEach(exp, supplier, boxingAdapter, asserter);
testMixedTraverseAndSplit(exp, supplier, boxingAdapter, asserter);
testSplitAfterFullTraversal(supplier, boxingAdapter);
testSplitOnce(exp, supplier, boxingAdapter, asserter);
testSplitSixDeep(exp, supplier, boxingAdapter, asserter);
testSplitUntilNull(exp, supplier, boxingAdapter, asserter);
}
//
private static <T, S extends Spliterator<T>> void testNullPointerException(Supplier<S> s) {
S sp = s.get();
// Have to check instances and use casts to avoid tripwire messages and
// directly test the primitive methods
if (sp instanceof Spliterator.OfInt) {
Spliterator.OfInt psp = (Spliterator.OfInt) sp;
executeAndCatch(NullPointerException.class, () -> psp.forEachRemaining((IntConsumer) null));
executeAndCatch(NullPointerException.class, () -> psp.tryAdvance((IntConsumer) null));
}
else if (sp instanceof Spliterator.OfLong) {
Spliterator.OfLong psp = (Spliterator.OfLong) sp;
executeAndCatch(NullPointerException.class, () -> psp.forEachRemaining((LongConsumer) null));
executeAndCatch(NullPointerException.class, () -> psp.tryAdvance((LongConsumer) null));
}
else if (sp instanceof Spliterator.OfDouble) {
Spliterator.OfDouble psp = (Spliterator.OfDouble) sp;
executeAndCatch(NullPointerException.class, () -> psp.forEachRemaining((DoubleConsumer) null));
executeAndCatch(NullPointerException.class, () -> psp.tryAdvance((DoubleConsumer) null));
}
else {
executeAndCatch(NullPointerException.class, () -> sp.forEachRemaining(null));
executeAndCatch(NullPointerException.class, () -> sp.tryAdvance(null));
}
}
private static <T, S extends Spliterator<T>> void testForEach(
Collection<T> exp,
Supplier<S> supplier,
UnaryOperator<Consumer<T>> boxingAdapter,
ContentAsserter<T> asserter) {
S spliterator = supplier.get();
long sizeIfKnown = spliterator.getExactSizeIfKnown();
boolean isOrdered = spliterator.hasCharacteristics(Spliterator.ORDERED);
ArrayList<T> fromForEach = new ArrayList<>();
spliterator = supplier.get();
Consumer<T> addToFromForEach = boxingAdapter.apply(fromForEach::add);
spliterator.forEachRemaining(addToFromForEach);
// Assert that forEach now produces no elements
spliterator.forEachRemaining(boxingAdapter.apply(
e -> fail("Spliterator.forEach produced an element after spliterator exhausted: " + e)));
// Assert that tryAdvance now produce no elements
spliterator.tryAdvance(boxingAdapter.apply(
e -> fail("Spliterator.tryAdvance produced an element after spliterator exhausted: " + e)));
// assert that size, tryAdvance, and forEach are consistent
if (sizeIfKnown >= 0) {
assertEquals(sizeIfKnown, exp.size());
}
assertEquals(fromForEach.size(), exp.size());
asserter.assertContents(fromForEach, exp, isOrdered);
}
private static <T, S extends Spliterator<T>> void testTryAdvance(
Collection<T> exp,
Supplier<S> supplier,
UnaryOperator<Consumer<T>> boxingAdapter,
ContentAsserter<T> asserter) {
S spliterator = supplier.get();
long sizeIfKnown = spliterator.getExactSizeIfKnown();
boolean isOrdered = spliterator.hasCharacteristics(Spliterator.ORDERED);
spliterator = supplier.get();
ArrayList<T> fromTryAdvance = new ArrayList<>();
Consumer<T> addToFromTryAdvance = boxingAdapter.apply(fromTryAdvance::add);
while (spliterator.tryAdvance(addToFromTryAdvance)) { }
// Assert that forEach now produces no elements
spliterator.forEachRemaining(boxingAdapter.apply(
e -> fail("Spliterator.forEach produced an element after spliterator exhausted: " + e)));
// Assert that tryAdvance now produce no elements
spliterator.tryAdvance(boxingAdapter.apply(
e -> fail("Spliterator.tryAdvance produced an element after spliterator exhausted: " + e)));
// assert that size, tryAdvance, and forEach are consistent
if (sizeIfKnown >= 0) {
assertEquals(sizeIfKnown, exp.size());
}
assertEquals(fromTryAdvance.size(), exp.size());
asserter.assertContents(fromTryAdvance, exp, isOrdered);
}
private static <T, S extends Spliterator<T>> void testMixedTryAdvanceForEach(
Collection<T> exp,
Supplier<S> supplier,
UnaryOperator<Consumer<T>> boxingAdapter,
ContentAsserter<T> asserter) {
S spliterator = supplier.get();
long sizeIfKnown = spliterator.getExactSizeIfKnown();
boolean isOrdered = spliterator.hasCharacteristics(Spliterator.ORDERED);
// tryAdvance first few elements, then forEach rest
ArrayList<T> dest = new ArrayList<>();
spliterator = supplier.get();
Consumer<T> addToDest = boxingAdapter.apply(dest::add);
for (int i = 0; i < 10 && spliterator.tryAdvance(addToDest); i++) { }
spliterator.forEachRemaining(addToDest);
// Assert that forEach now produces no elements
spliterator.forEachRemaining(boxingAdapter.apply(
e -> fail("Spliterator.forEach produced an element after spliterator exhausted: " + e)));
// Assert that tryAdvance now produce no elements
spliterator.tryAdvance(boxingAdapter.apply(
e -> fail("Spliterator.tryAdvance produced an element after spliterator exhausted: " + e)));
if (sizeIfKnown >= 0) {
assertEquals(sizeIfKnown, dest.size());
}
assertEquals(dest.size(), exp.size());
asserter.assertContents(dest, exp, isOrdered);
}
private static <T, S extends Spliterator<T>> void testMixedTraverseAndSplit(
Collection<T> exp,
Supplier<S> supplier,
UnaryOperator<Consumer<T>> boxingAdapter,
ContentAsserter<T> asserter) {
S spliterator = supplier.get();
long sizeIfKnown = spliterator.getExactSizeIfKnown();
boolean isOrdered = spliterator.hasCharacteristics(Spliterator.ORDERED);
// tryAdvance first few elements, then forEach rest
ArrayList<T> dest = new ArrayList<>();
spliterator = supplier.get();
Consumer<T> b = boxingAdapter.apply(dest::add);
Spliterator<T> spl1, spl2, spl3;
spliterator.tryAdvance(b);
spl2 = spliterator.trySplit();
if (spl2 != null) {
spl2.tryAdvance(b);
spl1 = spl2.trySplit();
if (spl1 != null) {
spl1.tryAdvance(b);
spl1.forEachRemaining(b);
}
spl2.tryAdvance(b);
spl2.forEachRemaining(b);
}
spliterator.tryAdvance(b);
spl3 = spliterator.trySplit();
if (spl3 != null) {
spl3.tryAdvance(b);
spl3.forEachRemaining(b);
}
spliterator.tryAdvance(b);
spliterator.forEachRemaining(b);
if (sizeIfKnown >= 0) {
assertEquals(sizeIfKnown, dest.size());
}
assertEquals(dest.size(), exp.size());
asserter.assertContents(dest, exp, isOrdered);
}
private static <T, S extends Spliterator<T>> void testSplitAfterFullTraversal(
Supplier<S> supplier,
UnaryOperator<Consumer<T>> boxingAdapter) {
// Full traversal using tryAdvance
Spliterator<T> spliterator = supplier.get();
while (spliterator.tryAdvance(boxingAdapter.apply(e -> { }))) { }
Spliterator<T> split = spliterator.trySplit();
assertNull(split);
// Full traversal using forEach
spliterator = supplier.get();
spliterator.forEachRemaining(boxingAdapter.apply(e -> { }));
split = spliterator.trySplit();
assertNull(split);
// Full traversal using tryAdvance then forEach
spliterator = supplier.get();
spliterator.tryAdvance(boxingAdapter.apply(e -> { }));
spliterator.forEachRemaining(boxingAdapter.apply(e -> { }));
split = spliterator.trySplit();
assertNull(split);
}
private static <T, S extends Spliterator<T>> void testSplitOnce(
Collection<T> exp,
Supplier<S> supplier,
UnaryOperator<Consumer<T>> boxingAdapter,
ContentAsserter<T> asserter) {
S spliterator = supplier.get();
long sizeIfKnown = spliterator.getExactSizeIfKnown();
boolean isOrdered = spliterator.hasCharacteristics(Spliterator.ORDERED);
ArrayList<T> fromSplit = new ArrayList<>();
Spliterator<T> s1 = supplier.get();
Spliterator<T> s2 = s1.trySplit();
long s1Size = s1.getExactSizeIfKnown();
long s2Size = (s2 != null) ? s2.getExactSizeIfKnown() : 0;
Consumer<T> addToFromSplit = boxingAdapter.apply(fromSplit::add);
if (s2 != null)
s2.forEachRemaining(addToFromSplit);
s1.forEachRemaining(addToFromSplit);
if (sizeIfKnown >= 0) {
assertEquals(sizeIfKnown, fromSplit.size());
if (s1Size >= 0 && s2Size >= 0)
assertEquals(sizeIfKnown, s1Size + s2Size);
}
asserter.assertContents(fromSplit, exp, isOrdered);
}
private static <T, S extends Spliterator<T>> void testSplitSixDeep(
Collection<T> exp,
Supplier<S> supplier,
UnaryOperator<Consumer<T>> boxingAdapter,
ContentAsserter<T> asserter) {
S spliterator = supplier.get();
boolean isOrdered = spliterator.hasCharacteristics(Spliterator.ORDERED);
for (int depth=0; depth < 6; depth++) {
List<T> dest = new ArrayList<>();
spliterator = supplier.get();
assertSpliterator(spliterator);
// verify splitting with forEach
splitSixDeepVisitor(depth, 0, dest, spliterator, boxingAdapter, spliterator.characteristics(), false);
asserter.assertContents(dest, exp, isOrdered);
// verify splitting with tryAdvance
dest.clear();
spliterator = supplier.get();
splitSixDeepVisitor(depth, 0, dest, spliterator, boxingAdapter, spliterator.characteristics(), true);
asserter.assertContents(dest, exp, isOrdered);
}
}
private static <T, S extends Spliterator<T>>
void splitSixDeepVisitor(int depth, int curLevel,
List<T> dest, S spliterator, UnaryOperator<Consumer<T>> boxingAdapter,
int rootCharacteristics, boolean useTryAdvance) {
if (curLevel < depth) {
long beforeSize = spliterator.getExactSizeIfKnown();
Spliterator<T> split = spliterator.trySplit();
if (split != null) {
assertSpliterator(split, rootCharacteristics);
assertSpliterator(spliterator, rootCharacteristics);
if ((rootCharacteristics & Spliterator.SUBSIZED) != 0 &&
(rootCharacteristics & Spliterator.SIZED) != 0) {
assertEquals(beforeSize, split.estimateSize() + spliterator.estimateSize());
}
splitSixDeepVisitor(depth, curLevel + 1, dest, split, boxingAdapter, rootCharacteristics, useTryAdvance);
}
splitSixDeepVisitor(depth, curLevel + 1, dest, spliterator, boxingAdapter, rootCharacteristics, useTryAdvance);
}
else {
long sizeIfKnown = spliterator.getExactSizeIfKnown();
if (useTryAdvance) {
Consumer<T> addToDest = boxingAdapter.apply(dest::add);
int count = 0;
while (spliterator.tryAdvance(addToDest)) {
++count;
}
if (sizeIfKnown >= 0)
assertEquals(sizeIfKnown, count);
// Assert that forEach now produces no elements
spliterator.forEachRemaining(boxingAdapter.apply(
e -> fail("Spliterator.forEach produced an element after spliterator exhausted: " + e)));
Spliterator<T> split = spliterator.trySplit();
assertNull(split);
}
else {
List<T> leafDest = new ArrayList<>();
Consumer<T> addToLeafDest = boxingAdapter.apply(leafDest::add);
spliterator.forEachRemaining(addToLeafDest);
if (sizeIfKnown >= 0)
assertEquals(sizeIfKnown, leafDest.size());
// Assert that forEach now produces no elements
spliterator.tryAdvance(boxingAdapter.apply(
e -> fail("Spliterator.tryAdvance produced an element after spliterator exhausted: " + e)));
Spliterator<T> split = spliterator.trySplit();
assertNull(split);
dest.addAll(leafDest);
}
}
}
private static <T, S extends Spliterator<T>> void testSplitUntilNull(
Collection<T> exp,
Supplier<S> supplier,
UnaryOperator<Consumer<T>> boxingAdapter,
ContentAsserter<T> asserter) {
Spliterator<T> s = supplier.get();
boolean isOrdered = s.hasCharacteristics(Spliterator.ORDERED);
assertSpliterator(s);
List<T> splits = new ArrayList<>();
Consumer<T> c = boxingAdapter.apply(splits::add);
testSplitUntilNull(new SplitNode<T>(c, s));
asserter.assertContents(splits, exp, isOrdered);
}
private static class SplitNode<T> {
// Constant for every node
final Consumer<T> c;
final int rootCharacteristics;
final Spliterator<T> s;
SplitNode(Consumer<T> c, Spliterator<T> s) {
this(c, s.characteristics(), s);
}
private SplitNode(Consumer<T> c, int rootCharacteristics, Spliterator<T> s) {
this.c = c;
this.rootCharacteristics = rootCharacteristics;
this.s = s;
}
SplitNode<T> fromSplit(Spliterator<T> split) {
return new SplitNode<>(c, rootCharacteristics, split);
}
}
/**
* Set the maximum stack capacity to 0.25MB. This should be more than enough to detect a bad spliterator
* while not unduly disrupting test infrastructure given the test data sizes that are used are small.
* Note that j.u.c.ForkJoinPool sets the max queue size to 64M (1 << 26).
*/
private static final int MAXIMUM_STACK_CAPACITY = 1 << 18; // 0.25MB
private static <T> void testSplitUntilNull(SplitNode<T> e) {
// Use an explicit stack to avoid a StackOverflowException when testing a Spliterator
// that when repeatedly split produces a right-balanced (and maybe degenerate) tree, or
// for a spliterator that is badly behaved.
Deque<SplitNode<T>> stack = new ArrayDeque<>();
stack.push(e);
int iteration = 0;
while (!stack.isEmpty()) {
assertTrue(iteration++ < MAXIMUM_STACK_CAPACITY, "Exceeded maximum stack modification count of 1 << 18");
e = stack.pop();
Spliterator<T> parentAndRightSplit = e.s;
long parentEstimateSize = parentAndRightSplit.estimateSize();
assertTrue(parentEstimateSize >= 0,
String.format("Split size estimate %d < 0", parentEstimateSize));
long parentSize = parentAndRightSplit.getExactSizeIfKnown();
Spliterator<T> leftSplit = parentAndRightSplit.trySplit();
if (leftSplit == null) {
parentAndRightSplit.forEachRemaining(e.c);
continue;
}
assertSpliterator(leftSplit, e.rootCharacteristics);
assertSpliterator(parentAndRightSplit, e.rootCharacteristics);
if (parentEstimateSize != Long.MAX_VALUE && leftSplit.estimateSize() > 0
&& parentAndRightSplit.estimateSize() > 0) {
assertTrue(leftSplit.estimateSize() < parentEstimateSize,
String.format("Left split size estimate %d >= parent split size estimate %d",
leftSplit.estimateSize(), parentEstimateSize));
assertTrue(parentAndRightSplit.estimateSize() < parentEstimateSize,
String.format("Right split size estimate %d >= parent split size estimate %d",
leftSplit.estimateSize(), parentEstimateSize));
}
else {
assertTrue(leftSplit.estimateSize() <= parentEstimateSize,
String.format("Left split size estimate %d > parent split size estimate %d",
leftSplit.estimateSize(), parentEstimateSize));
assertTrue(parentAndRightSplit.estimateSize() <= parentEstimateSize,
String.format("Right split size estimate %d > parent split size estimate %d",
leftSplit.estimateSize(), parentEstimateSize));
}
long leftSize = leftSplit.getExactSizeIfKnown();
long rightSize = parentAndRightSplit.getExactSizeIfKnown();
if (parentSize >= 0 && leftSize >= 0 && rightSize >= 0)
assertEquals(parentSize, leftSize + rightSize,
String.format("exact left split size %d + exact right split size %d != parent exact split size %d",
leftSize, rightSize, parentSize));
// Add right side to stack first so left side is popped off first
stack.push(e.fromSplit(parentAndRightSplit));
stack.push(e.fromSplit(leftSplit));
}
}
private static void assertSpliterator(Spliterator<?> s, int rootCharacteristics) {
if ((rootCharacteristics & Spliterator.SUBSIZED) != 0) {
assertTrue(s.hasCharacteristics(Spliterator.SUBSIZED),
"Child split is not SUBSIZED when root split is SUBSIZED");
}
assertSpliterator(s);
}
private static void assertSpliterator(Spliterator<?> s) {
if (s.hasCharacteristics(Spliterator.SUBSIZED)) {
assertTrue(s.hasCharacteristics(Spliterator.SIZED));
}
if (s.hasCharacteristics(Spliterator.SIZED)) {
assertTrue(s.estimateSize() != Long.MAX_VALUE);
assertTrue(s.getExactSizeIfKnown() >= 0);
}
try {
s.getComparator();
assertTrue(s.hasCharacteristics(Spliterator.SORTED));
} catch (IllegalStateException e) {
assertFalse(s.hasCharacteristics(Spliterator.SORTED));
}
}
private static<T> void assertContents(Collection<T> actual, Collection<T> expected, boolean isOrdered) {
if (isOrdered) {
assertEquals(actual, expected);
}
else {
LambdaTestHelpers.assertContentsUnordered(actual, expected);
}
}
private static void executeAndCatch(Class<? extends Exception> expected, Runnable r) {
Exception caught = null;
try {
r.run();
}
catch (Exception e) {
caught = e;
}
assertNotNull(caught,
String.format("No Exception was thrown, expected an Exception of %s to be thrown",
expected.getName()));
assertTrue(expected.isInstance(caught),
String.format("Exception thrown %s not an instance of %s",
caught.getClass().getName(), expected.getName()));
}
static<U> void mixedTraverseAndSplit(Consumer<U> b, Spliterator<U> splTop) {
Spliterator<U> spl1, spl2, spl3;
splTop.tryAdvance(b);
spl2 = splTop.trySplit();
if (spl2 != null) {
spl2.tryAdvance(b);
spl1 = spl2.trySplit();
if (spl1 != null) {
spl1.tryAdvance(b);
spl1.forEachRemaining(b);
}
spl2.tryAdvance(b);
spl2.forEachRemaining(b);
}
splTop.tryAdvance(b);
spl3 = splTop.trySplit();
if (spl3 != null) {
spl3.tryAdvance(b);
spl3.forEachRemaining(b);
}
splTop.tryAdvance(b);
splTop.forEachRemaining(b);
}
static void mixedTraverseAndSplit(IntConsumer b, Spliterator.OfInt splTop) {
Spliterator.OfInt spl1, spl2, spl3;
splTop.tryAdvance(b);
spl2 = splTop.trySplit();
if (spl2 != null) {
spl2.tryAdvance(b);
spl1 = spl2.trySplit();
if (spl1 != null) {
spl1.tryAdvance(b);
spl1.forEachRemaining(b);
}
spl2.tryAdvance(b);
spl2.forEachRemaining(b);
}
splTop.tryAdvance(b);
spl3 = splTop.trySplit();
if (spl3 != null) {
spl3.tryAdvance(b);
spl3.forEachRemaining(b);
}
splTop.tryAdvance(b);
splTop.forEachRemaining(b);
}
static void mixedTraverseAndSplit(LongConsumer b, Spliterator.OfLong splTop) {
Spliterator.OfLong spl1, spl2, spl3;
splTop.tryAdvance(b);
spl2 = splTop.trySplit();
if (spl2 != null) {
spl2.tryAdvance(b);
spl1 = spl2.trySplit();
if (spl1 != null) {
spl1.tryAdvance(b);
spl1.forEachRemaining(b);
}
spl2.tryAdvance(b);
spl2.forEachRemaining(b);
}
splTop.tryAdvance(b);
spl3 = splTop.trySplit();
if (spl3 != null) {
spl3.tryAdvance(b);
spl3.forEachRemaining(b);
}
splTop.tryAdvance(b);
splTop.forEachRemaining(b);
}
static void mixedTraverseAndSplit(DoubleConsumer b, Spliterator.OfDouble splTop) {
Spliterator.OfDouble spl1, spl2, spl3;
splTop.tryAdvance(b);
spl2 = splTop.trySplit();
if (spl2 != null) {
spl2.tryAdvance(b);
spl1 = spl2.trySplit();
if (spl1 != null) {
spl1.tryAdvance(b);
spl1.forEachRemaining(b);
}
spl2.tryAdvance(b);
spl2.forEachRemaining(b);
}
splTop.tryAdvance(b);
spl3 = splTop.trySplit();
if (spl3 != null) {
spl3.tryAdvance(b);
spl3.forEachRemaining(b);
}
splTop.tryAdvance(b);
splTop.forEachRemaining(b);
}
}