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 8025799 27 * @summary Reflection.getCallerClass(int) 28 * @modules java.base/jdk.internal.reflect 29 * @run main GetCallerClassWithDepth 30 */ 31 32 import jdk.internal.reflect.Reflection; 33 34 public class GetCallerClassWithDepth { 35 public static void main(String[] args) throws Exception { 36 Class<?> c = Test.test(); 37 assertEquals(c, GetCallerClassWithDepth.class); 38 Class<?> caller = Test.caller(); 39 assertEquals(caller, GetCallerClassWithDepth.class); 40 Test.selfTest(); 41 42 try { 43 Reflection.getCallerClass(-1); 44 throw new RuntimeException("getCallerClass(-1) should fail"); 45 } catch (Error e) { 46 System.out.println("Expected: " + e.getMessage()); 47 } 48 } 49 50 public Class<?> getCallerClass() { 51 // 0: Reflection 1: getCallerClass 2: Test.test 3: main 52 return Reflection.getCallerClass(3); 53 } 54 55 static void assertEquals(Class<?> c, Class<?> expected) { 56 if (c != expected) { 57 throw new RuntimeException("Incorrect caller: " + c); 58 } 59 } 60 61 static class Test { 62 // Returns the caller of this method 63 public static Class<?> test() { 64 return new GetCallerClassWithDepth().getCallerClass(); 65 } 66 67 // Returns the caller of this method 68 public static Class<?> caller() { 69 // 0: Reflection 1: Test.caller 2: main 70 return Reflection.getCallerClass(2); 71 } 72 public static void selfTest() { 73 // 0: Reflection 1: Test.selfTest 74 Class<?> c = Reflection.getCallerClass(1); 75 assertEquals(c, Test.class); 76 Inner1.deep(); 77 } 78 79 static class Inner1 { 80 static void deep() { 81 deeper(); 82 } 83 static void deeper() { 84 Inner2.deepest(); 85 } 86 static class Inner2 { 87 static void deepest() { 88 // 0: Reflection 1: deepest 2: deeper 3: deep 4: Test.selfTest 89 Class<?> c = Reflection.getCallerClass(4); 90 assertEquals(c, Test.class); 91 } 92 } 93 } 94 } 95 }