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
24/*
25 * @test
26 * @bug 8016081 8016178
27 * @summary structural most specific and stuckness
28 * @compile T8016177f.java
29 */
30import java.util.*;
31
32class T8016177f {
33
34    interface Function<S, T> {
35       T apply(S s);
36    }
37
38    interface IntFunction<T> {
39       T apply(int s);
40    }
41
42
43    interface BiConsumer<X,Y> {
44       void m(X x, Y y);
45    }
46
47    interface Consumer<X> {
48       void m(X x);
49    }
50
51    interface Supplier<X> {
52       X make();
53    }
54
55    interface TestData<T, S extends BaseStream<T, S>> {
56       interface OfRef<T> extends TestData<T, Stream<T>> { }
57       interface OfDouble extends TestData<Double, DoubleStream> { }
58    }
59
60    interface BaseStream<T, S extends BaseStream<T, S>> { }
61
62    interface Stream<T> extends BaseStream<T, Stream<T>> {
63       <M> Stream<M> map(Function<T, M> s);
64       <R> R collect(Supplier<R> resultFactory, BiConsumer<R, ? super T> accumulator, BiConsumer<R, R> combiner);
65       <Z> Z[] toArray(IntFunction<Z[]> s);
66    }
67
68    interface DoubleStream extends BaseStream<Double, DoubleStream> {
69       DoubleStream filter(DoublePredicate dp);
70       double[] toArray();
71    }
72
73    interface DoublePredicate {
74       boolean p(double d);
75    }
76
77    <T, U, R, S_IN extends BaseStream<T, S_IN>, S_OUT extends BaseStream<U, S_OUT>>
78           R exerciseTerminalOps(TestData<T, S_IN> data,
79                                 Function<S_IN, S_OUT> streamF,
80                                 Function<S_OUT, R> terminalF) { return null; }
81
82    <O> TestData.OfRef<O> ofCollection(Collection<O> collection) { return null; }
83
84    void test1(TestData.OfDouble data, DoublePredicate dp) {
85        exerciseTerminalOps(data, s -> s.filter(dp), s -> s.toArray());
86    }
87
88    void test2(Function<Double, Integer> fdi, TestData.OfRef<Double> td, Stream<Integer> si) {
89        exerciseTerminalOps(
90                        ofCollection((List<Double>)null),
91                        s -> s.map(fdi),
92                        s -> s.toArray(Integer[]::new));
93    }
94}
95