GetCallerClassWithDepth.java revision 14176:8606d027b2c2 
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 8137058
27 * @summary Basic test for the unsupported Reflection.getCallerClass(int)
28 * @modules jdk.unsupported
29 */
30
31import sun.reflect.Reflection;
32
33public class GetCallerClassWithDepth {
34    public static void main(String[] args) throws Exception {
35        Class<?> c = Test.test();
36        assertEquals(c, GetCallerClassWithDepth.class);
37        Class<?> caller = Test.caller();
38        assertEquals(caller, GetCallerClassWithDepth.class);
39        Test.selfTest();
40
41        try {
42            Reflection.getCallerClass(-1);
43            throw new RuntimeException("getCallerClass(-1) should fail");
44        } catch (Error e) {
45            System.out.println("Expected: " + e.getMessage());
46        }
47    }
48
49    public Class<?> getCallerClass() {
50        // 0: Reflection 1: getCallerClass 2: Test.test 3: main
51        return Reflection.getCallerClass(3);
52    }
53
54    static void assertEquals(Class<?> c, Class<?> expected) {
55        if (c != expected) {
56            throw new RuntimeException("Incorrect caller: " + c);
57        }
58    }
59
60    static class Test {
61        // Returns the caller of this method
62        public static Class<?> test() {
63            return new GetCallerClassWithDepth().getCallerClass();
64        }
65
66        // Returns the caller of this method
67        public static Class<?> caller() {
68            // 0: Reflection 1: Test.caller 2: main
69            return Reflection.getCallerClass(2);
70        }
71        public static void selfTest() {
72            // 0: Reflection 1: Test.selfTest
73            Class<?> c = Reflection.getCallerClass(1);
74            assertEquals(c, Test.class);
75            Inner1.deep();
76        }
77
78        static class Inner1 {
79            static void deep() {
80                 deeper();
81            }
82            static void deeper() {
83                 Inner2.deepest();
84            }
85            static class Inner2 {
86                static void deepest() {
87                    // 0: Reflection 1: deepest 2: deeper 3: deep 4: Test.selfTest
88                    Class<?> c = Reflection.getCallerClass(4);
89                    assertEquals(c, Test.class);
90                }
91            }
92        }
93    }
94}
95