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