1 /*
2  * Copyright (c) 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  */
23 package java.util.stream;
24 
25 /**
26  * The base type of a stateless test operation
27  */
28 interface StatelessTestOp<E_IN, E_OUT> extends IntermediateTestOp<E_IN, E_OUT> {
29 
30     @SuppressWarnings({"rawtypes", "unchecked"})
chain(AbstractPipeline upstream, StatelessTestOp<?, T> op)31     public static<T> AbstractPipeline chain(AbstractPipeline upstream,
32                                             StatelessTestOp<?, T> op) {
33         int flags = op.opGetFlags();
34         switch (op.outputShape()) {
35             case REFERENCE:
36                 return new ReferencePipeline.StatelessOp<Object, T>(upstream, op.inputShape(), flags) {
37                     public Sink opWrapSink(int flags, Sink<T> sink) {
38                         return op.opWrapSink(flags, isParallel(), sink);
39                     }
40                 };
41             case INT_VALUE:
42                 return new IntPipeline.StatelessOp<Object>(upstream, op.inputShape(), flags) {
43                     public Sink opWrapSink(int flags, Sink sink) {
44                         return op.opWrapSink(flags, isParallel(), sink);
45                     }
46                 };
47             case LONG_VALUE:
48                 return new LongPipeline.StatelessOp<Object>(upstream, op.inputShape(), flags) {
49                     @Override
50                     Sink opWrapSink(int flags, Sink sink) {
51                         return op.opWrapSink(flags, isParallel(), sink);
52                     }
53                 };
54             case DOUBLE_VALUE:
55                 return new DoublePipeline.StatelessOp<Object>(upstream, op.inputShape(), flags) {
56                     @Override
57                     Sink opWrapSink(int flags, Sink sink) {
58                         return op.opWrapSink(flags, isParallel(), sink);
59                     }
60                 };
61             default: throw new IllegalStateException(op.outputShape().toString());
62         }
63     }
64 
65     default StreamShape inputShape() { return StreamShape.REFERENCE; }
66 
67     default StreamShape outputShape() { return StreamShape.REFERENCE; }
68 
69     default int opGetFlags() { return 0; }
70 
71     Sink<E_IN> opWrapSink(int flags, boolean parallel, Sink<E_OUT> sink);
72 }
73 
74