1/*
2 * Copyright (c) 2011, 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 8003280
27 * @summary Add lambda tests
28 *   Test that parameter types are inferred from SAM descriptor when method parameters are elided,
29             with different types of method references
30 * @compile MethodRef7.java
31 * @run main MethodRef7
32 */
33
34public class MethodRef7 {
35
36    static interface A {void m();}
37
38    static interface A2 {void m(int n);}
39
40    static interface B {String m();}
41
42    static interface B2 {String m(int n);}
43
44    static interface C {String m(MethodRef7 mr);}
45
46    static interface C2 {String m(MethodRef7 mr, int n);}
47
48    static interface D {Fee<String> m();}
49
50    static interface D2 {Fee<String> m(String s);}
51
52    static class Fee<T> {
53
54        public Fee() {
55            System.out.println("Fee<T> instantiated");
56        }
57
58        public Fee(String s) {
59            System.out.println("Fee<T> instantiated: " + s);
60        }
61    }
62
63    private static void assertTrue(boolean cond) {
64        if (!cond)
65            throw new AssertionError();
66    }
67
68    static void bar() {
69        System.out.println("MethodRef_neg1.bar()");
70    }
71
72    static void bar(int x) {
73        System.out.println("MethodRef_neg1.bar(int) " + x);
74    }
75
76    String wahoo() {
77        return "wahoo";
78    }
79
80    String wahoo(int x) {
81        return "wahoo " + x;
82    }
83
84    public static void main(String[] args) {
85
86        A a = MethodRef7::bar; //static reference to bar()
87        a.m();
88        A2 a2 = MethodRef7::bar; //static reference to bar(int x)
89        a2.m(10);
90
91        MethodRef7 mr = new MethodRef7();
92        B b = mr::wahoo; //instance reference to wahoo()
93        assertTrue(b.m().equals("wahoo"));
94        B2 b2 = mr::wahoo; //instance reference to wahoo(int x)
95        assertTrue(b2.m(1).equals("wahoo 1"));
96
97        C c = MethodRef7::wahoo; //unbound reference to wahoo()
98        assertTrue(c.m(mr).equals("wahoo"));
99        C2 c2 = MethodRef7::wahoo; //unbound reference to wahoo(int x)
100        assertTrue(c2.m(mr, 2).equals("wahoo 2"));
101
102        D d = Fee<String>::new; //constructor reference to Fee()
103        D2 d2 = Fee<String>::new; //constructor reference to Fee(String s)
104    }
105}
106