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 

    31 import sun.reflect.Reflection;

    32 

    33 public 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 }