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/*
* 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.util.stream;
import org.testng.Assert;
import java.util.Spliterator;
import java.util.function.IntFunction;
/** Test helper class for java.util.stream test framework */
public final class CollectorOps {
private CollectorOps() { }
public static <E_IN> StatefulTestOp<E_IN> collector() {
return new StatefulCollector<>(0, StreamShape.REFERENCE);
}
/* Utility classes for collecting output of intermediate pipeline stages */
public static class StatefulCollector<E_IN> implements StatefulTestOp<E_IN> {
private final int opFlags;
private final StreamShape inputShape;
public StatefulCollector(int opFlags, StreamShape inputShape) {
this.opFlags = opFlags;
this.inputShape = inputShape;
}
@Override
public StreamShape inputShape() {
return inputShape;
}
@Override
public StreamShape outputShape() {
return inputShape;
}
@Override
public int opGetFlags() {
return opFlags;
}
@Override
public Sink<E_IN> opWrapSink(int flags, boolean parallel, Sink<E_IN> sink) {
return sink;
}
@Override
public <P_IN> Node<E_IN> opEvaluateParallel(PipelineHelper<E_IN> helper,
Spliterator<P_IN> spliterator,
IntFunction<E_IN[]> generator) {
return helper.evaluate(spliterator, false, generator);
}
}
public static class TestParallelSizedOp<T> extends StatefulCollector<T> {
public TestParallelSizedOp() {
this(StreamShape.REFERENCE);
}
protected TestParallelSizedOp(StreamShape shape) {
super(0, shape);
}
@Override
public <P_IN> Node<T> opEvaluateParallel(PipelineHelper<T> helper,
Spliterator<P_IN> spliterator,
IntFunction<T[]> generator) {
int flags = helper.getStreamAndOpFlags();
Assert.assertTrue(StreamOpFlag.SIZED.isKnown(flags));
return super.opEvaluateParallel(helper, spliterator, generator);
}
public static class OfInt extends TestParallelSizedOp<Integer> {
public OfInt() {
super(StreamShape.INT_VALUE);
}
}
public static class OfLong extends TestParallelSizedOp<Long> {
public OfLong() {
super(StreamShape.LONG_VALUE);
}
}
public static class OfDouble extends TestParallelSizedOp<Double> {
public OfDouble() {
super(StreamShape.DOUBLE_VALUE);
}
}
}
}
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