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 */
23package java.util.stream;
24
25/**
26 * The base type of a stateless test operation
27 */
28interface StatelessTestOp<E_IN, E_OUT> extends IntermediateTestOp<E_IN, E_OUT> {
29
30    @SuppressWarnings({"rawtypes", "unchecked"})
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