author | duke |
Wed, 05 Jul 2017 23:27:00 +0200 | |
changeset 45093 | c42dc7b58b4d |
parent 43792 | jdk/test/java/util/stream/bootlib/java.base/java/util/stream/StreamTestScenario.java@05d6b8f2eff5 |
parent 45069 | jdk/test/java/util/stream/bootlib/java.base/java/util/stream/StreamTestScenario.java@b13bb485359a |
child 45225 | aa5b01f5e562 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.util.stream; |
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import java.util.Collections; |
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import java.util.EnumSet; |
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import java.util.Iterator; |
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import java.util.Set; |
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import java.util.Spliterator; |
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import java.util.SpliteratorTestHelper; |
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import java.util.function.Consumer; |
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import java.util.function.Function; |
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/** |
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* Test scenarios for reference streams. |
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* |
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* Each scenario is provided with a data source, a function that maps a fresh |
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* stream (as provided by the data source) to a new stream, and a sink to |
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* receive results. Each scenario describes a different way of computing the |
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* stream contents. The test driver will ensure that all scenarios produce |
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* the same output (modulo allowable differences in ordering). |
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*/ |
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@SuppressWarnings({"rawtypes", "unchecked"}) |
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public enum StreamTestScenario implements OpTestCase.BaseStreamTestScenario { |
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STREAM_FOR_EACH(false) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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Stream<U> s = m.apply(source); |
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if (s.isParallel()) { |
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s = s.sequential(); |
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} |
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s.forEach(b); |
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} |
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}, |
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// Collec to list |
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STREAM_COLLECT(false) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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for (U t : m.apply(source).collect(Collectors.toList())) { |
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b.accept(t); |
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} |
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} |
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}, |
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// To array |
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STREAM_TO_ARRAY(false) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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for (Object t : m.apply(source).toArray()) { |
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b.accept((U) t); |
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} |
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} |
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}, |
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// Wrap as stream, and iterate in pull mode |
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STREAM_ITERATOR(false) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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for (Iterator<U> seqIter = m.apply(source).iterator(); seqIter.hasNext(); ) |
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b.accept(seqIter.next()); |
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} |
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}, |
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// Wrap as stream, and spliterate then iterate in pull mode |
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STREAM_SPLITERATOR(false) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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for (Spliterator<U> spl = m.apply(source).spliterator(); spl.tryAdvance(b); ) { |
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} |
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} |
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}, |
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// Wrap as stream, spliterate, then split a few times mixing advances with forEach |
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STREAM_SPLITERATOR_WITH_MIXED_TRAVERSE_AND_SPLIT(false) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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SpliteratorTestHelper.mixedTraverseAndSplit(b, m.apply(source).spliterator()); |
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} |
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}, |
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// Wrap as stream, and spliterate then iterate in pull mode |
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STREAM_SPLITERATOR_FOREACH(false) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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m.apply(source).spliterator().forEachRemaining(b); |
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} |
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}, |
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// Wrap as parallel stream + sequential |
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PAR_STREAM_SEQUENTIAL_FOR_EACH(true) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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m.apply(source).sequential().forEach(b); |
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} |
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}, |
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// Wrap as parallel stream + forEachOrdered |
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PAR_STREAM_FOR_EACH_ORDERED(true) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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// @@@ Want to explicitly select ordered equalator |
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m.apply(source).forEachOrdered(b); |
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} |
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}, |
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// Wrap as stream, and spliterate then iterate sequentially |
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PAR_STREAM_SPLITERATOR(true) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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for (Spliterator<U> spl = m.apply(source).spliterator(); spl.tryAdvance(b); ) { |
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} |
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} |
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}, |
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|
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// Wrap as stream, and spliterate then iterate sequentially |
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PAR_STREAM_SPLITERATOR_FOREACH(true) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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m.apply(source).spliterator().forEachRemaining(b); |
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} |
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}, |
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|
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// Wrap as parallel stream + toArray |
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PAR_STREAM_TO_ARRAY(true) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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for (Object t : m.apply(source).toArray()) |
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b.accept((U) t); |
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} |
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}, |
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|
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// Wrap as parallel stream, get the spliterator, wrap as a stream + toArray |
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PAR_STREAM_SPLITERATOR_STREAM_TO_ARRAY(true) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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Stream<U> s = m.apply(source); |
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Spliterator<U> sp = s.spliterator(); |
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Stream<U> ss = StreamSupport.stream(() -> sp, |
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StreamOpFlag.toCharacteristics(OpTestCase.getStreamFlags(s)) |
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| (sp.getExactSizeIfKnown() < 0 ? 0 : Spliterator.SIZED), true); |
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for (Object t : ss.toArray()) |
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b.accept((U) t); |
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} |
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}, |
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|
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// Wrap as parallel stream + toArray and clear SIZED flag |
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PAR_STREAM_TO_ARRAY_CLEAR_SIZED(true) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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S_IN pipe1 = (S_IN) OpTestCase.chain(source, |
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new FlagDeclaringOp(StreamOpFlag.NOT_SIZED, data.getShape())); |
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Stream<U> pipe2 = m.apply(pipe1); |
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|
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for (Object t : pipe2.toArray()) |
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b.accept((U) t); |
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} |
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}, |
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|
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// Wrap as parallel + collect to list |
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PAR_STREAM_COLLECT_TO_LIST(true) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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for (U u : m.apply(source).collect(Collectors.toList())) |
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b.accept(u); |
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} |
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}, |
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|
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// Wrap sequential as parallel, + collect to list |
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STREAM_TO_PAR_STREAM_COLLECT_TO_LIST(true) { |
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public <T, S_IN extends BaseStream<T, S_IN>> |
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S_IN getStream(TestData<T, S_IN> data) { |
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return data.stream().parallel(); |
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195 |
} |
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196 |
|
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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for (U u : m.apply(source).collect(Collectors.toList())) |
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b.accept(u); |
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} |
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}, |
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203 |
|
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// Wrap parallel as sequential,, + collect |
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PAR_STREAM_TO_STREAM_COLLECT_TO_LIST(true) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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207 |
void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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for (U u : m.apply(source).collect(Collectors.toList())) |
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b.accept(u); |
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} |
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}, |
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|
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// Wrap as parallel stream + forEach synchronizing |
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PAR_STREAM_FOR_EACH(true, false) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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m.apply(source).forEach(e -> { |
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synchronized (data) { |
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b.accept(e); |
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} |
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221 |
}); |
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222 |
} |
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223 |
}, |
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224 |
|
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// Wrap as parallel stream + forEach synchronizing and clear SIZED flag |
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PAR_STREAM_FOR_EACH_CLEAR_SIZED(true, false) { |
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<T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m) { |
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S_IN pipe1 = (S_IN) OpTestCase.chain(source, |
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new FlagDeclaringOp(StreamOpFlag.NOT_SIZED, data.getShape())); |
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m.apply(pipe1).forEach(e -> { |
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synchronized (data) { |
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b.accept(e); |
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} |
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}); |
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} |
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}, |
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; |
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// The set of scenarios that clean the SIZED flag |
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public static final Set<StreamTestScenario> CLEAR_SIZED_SCENARIOS = Collections.unmodifiableSet( |
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EnumSet.of(PAR_STREAM_TO_ARRAY_CLEAR_SIZED, PAR_STREAM_FOR_EACH_CLEAR_SIZED)); |
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private final boolean isParallel; |
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private final boolean isOrdered; |
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StreamTestScenario(boolean isParallel) { |
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this(isParallel, true); |
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} |
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StreamTestScenario(boolean isParallel, boolean isOrdered) { |
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this.isParallel = isParallel; |
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this.isOrdered = isOrdered; |
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} |
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public StreamShape getShape() { |
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return StreamShape.REFERENCE; |
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} |
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public boolean isParallel() { |
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return isParallel; |
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} |
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public boolean isOrdered() { |
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return isOrdered; |
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} |
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public <T, U, S_IN extends BaseStream<T, S_IN>, S_OUT extends BaseStream<U, S_OUT>> |
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void run(TestData<T, S_IN> data, Consumer<U> b, Function<S_IN, S_OUT> m) { |
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try (S_IN source = getStream(data)) { |
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run(data, source, b, (Function<S_IN, Stream<U>>) m); |
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} |
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} |
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abstract <T, U, S_IN extends BaseStream<T, S_IN>> |
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void run(TestData<T, S_IN> data, S_IN source, Consumer<U> b, Function<S_IN, Stream<U>> m); |
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} |