1/* 2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23package org.openjdk.testlib.java.util.stream; 24 25import java.util.Spliterator; 26import java.util.function.IntFunction; 27import java.util.stream.*; 28 29/** 30 * The base type for a stateful test operation. 31 */ 32interface StatefulTestOp<E> extends IntermediateTestOp<E, E> { 33 34 @SuppressWarnings({"rawtypes", "unchecked"}) 35 public static<T> AbstractPipeline chain(AbstractPipeline upstream, 36 StatefulTestOp op) { 37 switch (op.outputShape()) { 38 case REFERENCE: 39 return new ReferencePipeline.StatefulOp<Object, T>(upstream, op.inputShape(), op.opGetFlags()) { 40 @Override 41 public Sink opWrapSink(int flags, Sink sink) { 42 return op.opWrapSink(flags, isParallel(), sink); 43 } 44 45 @Override 46 public <P_IN> Spliterator<T> opEvaluateParallelLazy(PipelineHelper<T> helper, 47 Spliterator<P_IN> spliterator) { 48 return op.opEvaluateParallelLazy(helper, spliterator); 49 } 50 51 @Override 52 public <P_IN> Node<T> opEvaluateParallel(PipelineHelper<T> helper, 53 Spliterator<P_IN> spliterator, 54 IntFunction<T[]> generator) { 55 return op.opEvaluateParallel(helper, spliterator, generator); 56 } 57 }; 58 case INT_VALUE: 59 return new IntPipeline.StatefulOp<Object>(upstream, op.inputShape(), op.opGetFlags()) { 60 @Override 61 public Sink opWrapSink(int flags, Sink sink) { 62 return op.opWrapSink(flags, isParallel(), sink); 63 } 64 65 @Override 66 public <P_IN> Spliterator<Integer> opEvaluateParallelLazy(PipelineHelper<Integer> helper, 67 Spliterator<P_IN> spliterator) { 68 return op.opEvaluateParallelLazy(helper, spliterator); 69 } 70 71 @Override 72 public <P_IN> Node<Integer> opEvaluateParallel(PipelineHelper<Integer> helper, 73 Spliterator<P_IN> spliterator, 74 IntFunction<Integer[]> generator) { 75 return (Node<Integer>) op.opEvaluateParallel(helper, spliterator, generator); 76 } 77 }; 78 case LONG_VALUE: 79 return new LongPipeline.StatefulOp<Object>(upstream, op.inputShape(), op.opGetFlags()) { 80 @Override 81 public Sink opWrapSink(int flags, Sink sink) { 82 return op.opWrapSink(flags, isParallel(), sink); 83 } 84 85 public @Override 86 <P_IN> Spliterator<Long> opEvaluateParallelLazy(PipelineHelper<Long> helper, 87 Spliterator<P_IN> spliterator) { 88 return op.opEvaluateParallelLazy(helper, spliterator); 89 } 90 91 public @Override 92 <P_IN> Node<Long> opEvaluateParallel(PipelineHelper<Long> helper, 93 Spliterator<P_IN> spliterator, 94 IntFunction<Long[]> generator) { 95 return (Node<Long>) op.opEvaluateParallel(helper, spliterator, generator); 96 } 97 }; 98 case DOUBLE_VALUE: 99 return new DoublePipeline.StatefulOp<Object>(upstream, op.inputShape(), op.opGetFlags()) { 100 @Override 101 public Sink opWrapSink(int flags, Sink sink) { 102 return op.opWrapSink(flags, isParallel(), sink); 103 } 104 105 @Override 106 public <P_IN> Spliterator<Double> opEvaluateParallelLazy(PipelineHelper<Double> helper, 107 Spliterator<P_IN> spliterator) { 108 return op.opEvaluateParallelLazy(helper, spliterator); 109 } 110 111 @Override 112 public <P_IN> Node<Double> opEvaluateParallel(PipelineHelper<Double> helper, 113 Spliterator<P_IN> spliterator, 114 IntFunction<Double[]> generator) { 115 return (Node<Double>) op.opEvaluateParallel(helper, spliterator, generator); 116 } 117 }; 118 default: throw new IllegalStateException(op.outputShape().toString()); 119 } 120 } 121 122 default StreamShape inputShape() { return StreamShape.REFERENCE; } 123 124 default StreamShape outputShape() { return StreamShape.REFERENCE; } 125 126 default int opGetFlags() { return 0; } 127 128 Sink<E> opWrapSink(int flags, boolean parallel, Sink<E> sink); 129 130 @SuppressWarnings("unchecked") 131 default <P_IN> Spliterator<E> opEvaluateParallelLazy(PipelineHelper<E> helper, 132 Spliterator<P_IN> spliterator) { 133 return opEvaluateParallel(helper, spliterator, i -> (E[]) new Object[i]).spliterator(); 134 } 135 136 <P_IN> Node<E> opEvaluateParallel(PipelineHelper<E> helper, 137 Spliterator<P_IN> spliterator, 138 IntFunction<E[]> generator); 139} 140