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 java.util.stream; 24 25import java.util.Spliterator; 26import java.util.function.IntFunction; 27 28/** 29 * The base type for a stateful test operation. 30 */ 31interface StatefulTestOp<E> extends IntermediateTestOp<E, E> { 32 33 @SuppressWarnings({"rawtypes", "unchecked"}) 34 public static<T> AbstractPipeline chain(AbstractPipeline upstream, 35 StatefulTestOp op) { 36 switch (op.outputShape()) { 37 case REFERENCE: 38 return new ReferencePipeline.StatefulOp<Object, T>(upstream, op.inputShape(), op.opGetFlags()) { 39 @Override 40 public Sink opWrapSink(int flags, Sink sink) { 41 return op.opWrapSink(flags, isParallel(), sink); 42 } 43 44 @Override 45 public <P_IN> Spliterator<T> opEvaluateParallelLazy(PipelineHelper<T> helper, 46 Spliterator<P_IN> spliterator) { 47 return op.opEvaluateParallelLazy(helper, spliterator); 48 } 49 50 @Override 51 public <P_IN> Node<T> opEvaluateParallel(PipelineHelper<T> helper, 52 Spliterator<P_IN> spliterator, 53 IntFunction<T[]> generator) { 54 return op.opEvaluateParallel(helper, spliterator, generator); 55 } 56 }; 57 case INT_VALUE: 58 return new IntPipeline.StatefulOp<Object>(upstream, op.inputShape(), op.opGetFlags()) { 59 @Override 60 public Sink opWrapSink(int flags, Sink sink) { 61 return op.opWrapSink(flags, isParallel(), sink); 62 } 63 64 @Override 65 public <P_IN> Spliterator<Integer> opEvaluateParallelLazy(PipelineHelper<Integer> helper, 66 Spliterator<P_IN> spliterator) { 67 return op.opEvaluateParallelLazy(helper, spliterator); 68 } 69 70 @Override 71 public <P_IN> Node<Integer> opEvaluateParallel(PipelineHelper<Integer> helper, 72 Spliterator<P_IN> spliterator, 73 IntFunction<Integer[]> generator) { 74 return (Node<Integer>) op.opEvaluateParallel(helper, spliterator, generator); 75 } 76 }; 77 case LONG_VALUE: 78 return new LongPipeline.StatefulOp<Object>(upstream, op.inputShape(), op.opGetFlags()) { 79 @Override 80 public Sink opWrapSink(int flags, Sink sink) { 81 return op.opWrapSink(flags, isParallel(), sink); 82 } 83 84 @Override 85 public <P_IN> Spliterator<Long> opEvaluateParallelLazy(PipelineHelper<Long> helper, 86 Spliterator<P_IN> spliterator) { 87 return op.opEvaluateParallelLazy(helper, spliterator); 88 } 89 90 @Override 91 public <P_IN> Node<Long> opEvaluateParallel(PipelineHelper<Long> helper, 92 Spliterator<P_IN> spliterator, 93 IntFunction<Long[]> generator) { 94 return (Node<Long>) op.opEvaluateParallel(helper, spliterator, generator); 95 } 96 }; 97 case DOUBLE_VALUE: 98 return new DoublePipeline.StatefulOp<Object>(upstream, op.inputShape(), op.opGetFlags()) { 99 @Override 100 public Sink opWrapSink(int flags, Sink sink) { 101 return op.opWrapSink(flags, isParallel(), sink); 102 } 103 104 @Override 105 public <P_IN> Spliterator<Double> opEvaluateParallelLazy(PipelineHelper<Double> helper, 106 Spliterator<P_IN> spliterator) { 107 return op.opEvaluateParallelLazy(helper, spliterator); 108 } 109 110 @Override 111 public <P_IN> Node<Double> opEvaluateParallel(PipelineHelper<Double> helper, 112 Spliterator<P_IN> spliterator, 113 IntFunction<Double[]> generator) { 114 return (Node<Double>) op.opEvaluateParallel(helper, spliterator, generator); 115 } 116 }; 117 default: throw new IllegalStateException(op.outputShape().toString()); 118 } 119 } 120 121 default StreamShape inputShape() { return StreamShape.REFERENCE; } 122 123 default StreamShape outputShape() { return StreamShape.REFERENCE; } 124 125 default int opGetFlags() { return 0; } 126 127 Sink<E> opWrapSink(int flags, boolean parallel, Sink<E> sink); 128 129 @SuppressWarnings("unchecked") 130 default <P_IN> Spliterator<E> opEvaluateParallelLazy(PipelineHelper<E> helper, 131 Spliterator<P_IN> spliterator) { 132 return opEvaluateParallel(helper, spliterator, i -> (E[]) new Object[i]).spliterator(); 133 } 134 135 <P_IN> Node<E> opEvaluateParallel(PipelineHelper<E> helper, 136 Spliterator<P_IN> spliterator, 137 IntFunction<E[]> generator); 138} 139