LambdaCapture05.java revision 1414:01c9d4161882 
1/*
2 * Copyright (c) 2012, 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 for capture in nested lambda expressions
29 * @author  Maurizio Cimadamore
30 * @run main LambdaCapture05
31 */
32
33public class LambdaCapture05 {
34
35    static int assertionCount = 0;
36
37    static void assertTrue(boolean cond) {
38        assertionCount++;
39        if (!cond)
40            throw new AssertionError();
41    }
42
43    interface TU<T, U> {
44        public T foo(U u);
45    }
46
47    public static <T, U> T exec(TU<T, U> lambda, U x) {
48        return lambda.foo(x);
49    }
50
51    int i = 40;
52
53    void test1(final int a0) {
54        exec((final Integer a1) -> {
55            final Integer x2 = 10; exec((final Integer a2) -> {
56                final Integer x3 = 20;
57                exec((final Integer a3) -> { assertTrue(106 == (a0 + a1 + a2 + a3 + x2 + x3 + i)); return null; }, 3);
58                return null;
59            },2);
60            return null;
61        },1);
62    }
63
64    static void test2(final int a0) {
65        exec((final Integer a1) -> {
66            final Integer x2 = 10; exec((final Integer a2) -> {
67                final Integer x3 = 20;
68                exec((final Integer a3) -> { assertTrue(66 == (a0 + a1 + a2 + a3 + x2 + x3)); return null; }, 3);
69                return null;
70            }, 2);
71            return null;
72        }, 1);
73    }
74
75    public static void main(String[] args) {
76        LambdaCapture05 t = new LambdaCapture05();
77        t.test1(30);
78        test2(30);
79        assertTrue(assertionCount == 2);
80    }
81}
82