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Java example source code file (StatefulTestOp.java)
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The StatefulTestOp.java Java example source code
/*
* 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 java.util.Spliterator;
import java.util.function.IntFunction;
/**
* The base type for a stateful test operation.
*/
interface StatefulTestOp<E> extends IntermediateTestOp {
@SuppressWarnings({"rawtypes", "unchecked"})
public static<T> AbstractPipeline chain(AbstractPipeline upstream,
StatefulTestOp op) {
switch (op.outputShape()) {
case REFERENCE:
return new ReferencePipeline.StatefulOp<Object, T>(upstream, op.inputShape(), op.opGetFlags()) {
@Override
Sink opWrapSink(int flags, Sink sink) {
return op.opWrapSink(flags, isParallel(), sink);
}
@Override
<P_IN> Spliterator opEvaluateParallelLazy(PipelineHelper helper,
Spliterator<P_IN> spliterator) {
return op.opEvaluateParallelLazy(helper, spliterator);
}
@Override
<P_IN> Node opEvaluateParallel(PipelineHelper helper,
Spliterator<P_IN> spliterator,
IntFunction<T[]> generator) {
return op.opEvaluateParallel(helper, spliterator, generator);
}
};
case INT_VALUE:
return new IntPipeline.StatefulOp<Object>(upstream, op.inputShape(), op.opGetFlags()) {
@Override
Sink opWrapSink(int flags, Sink sink) {
return op.opWrapSink(flags, isParallel(), sink);
}
@Override
<P_IN> Spliterator opEvaluateParallelLazy(PipelineHelper helper,
Spliterator<P_IN> spliterator) {
return op.opEvaluateParallelLazy(helper, spliterator);
}
@Override
<P_IN> Node opEvaluateParallel(PipelineHelper helper,
Spliterator<P_IN> spliterator,
IntFunction<Integer[]> generator) {
return (Node<Integer>) op.opEvaluateParallel(helper, spliterator, generator);
}
};
case LONG_VALUE:
return new LongPipeline.StatefulOp<Object>(upstream, op.inputShape(), op.opGetFlags()) {
@Override
Sink opWrapSink(int flags, Sink sink) {
return op.opWrapSink(flags, isParallel(), sink);
}
@Override
<P_IN> Spliterator opEvaluateParallelLazy(PipelineHelper helper,
Spliterator<P_IN> spliterator) {
return op.opEvaluateParallelLazy(helper, spliterator);
}
@Override
<P_IN> Node opEvaluateParallel(PipelineHelper helper,
Spliterator<P_IN> spliterator,
IntFunction<Long[]> generator) {
return (Node<Long>) op.opEvaluateParallel(helper, spliterator, generator);
}
};
case DOUBLE_VALUE:
return new DoublePipeline.StatefulOp<Object>(upstream, op.inputShape(), op.opGetFlags()) {
@Override
Sink opWrapSink(int flags, Sink sink) {
return op.opWrapSink(flags, isParallel(), sink);
}
@Override
<P_IN> Spliterator opEvaluateParallelLazy(PipelineHelper helper,
Spliterator<P_IN> spliterator) {
return op.opEvaluateParallelLazy(helper, spliterator);
}
@Override
<P_IN> Node opEvaluateParallel(PipelineHelper helper,
Spliterator<P_IN> spliterator,
IntFunction<Double[]> generator) {
return (Node<Double>) op.opEvaluateParallel(helper, spliterator, generator);
}
};
default: throw new IllegalStateException(op.outputShape().toString());
}
}
default StreamShape inputShape() { return StreamShape.REFERENCE; }
default StreamShape outputShape() { return StreamShape.REFERENCE; }
default int opGetFlags() { return 0; }
Sink<E> opWrapSink(int flags, boolean parallel, Sink sink);
@SuppressWarnings("unchecked")
default <P_IN> Spliterator opEvaluateParallelLazy(PipelineHelper helper,
Spliterator<P_IN> spliterator) {
return opEvaluateParallel(helper, spliterator, i -> (E[]) new Object[i]).spliterator();
}
<P_IN> Node opEvaluateParallel(PipelineHelper helper,
Spliterator<P_IN> spliterator,
IntFunction<E[]> generator);
}
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