/*

 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @bug 8025799

 * @summary sun.reflect.Reflection.getCallerClass(int)

 * @modules java.base/sun.reflect

 * @run main GetCallerClassWithDepth

 */

public class GetCallerClassWithDepth {

    public static void main(String[] args) throws Exception {

        Class<?> c = Test.test();

        assertEquals(c, GetCallerClassWithDepth.class);

        Class<?> caller = Test.caller();

        assertEquals(caller, GetCallerClassWithDepth.class);

        Test.selfTest();

        try {

            sun.reflect.Reflection.getCallerClass(-1);

            throw new RuntimeException("getCallerClass(-1) should fail");

        } catch (Error e) {

            System.out.println("Expected: " + e.getMessage());

        }

    }

    public Class<?> getCallerClass() {

        // 0: Reflection 1: getCallerClass 2: Test.test 3: main

        return sun.reflect.Reflection.getCallerClass(3);

    }

    static void assertEquals(Class<?> c, Class<?> expected) {

        if (c != expected) {

            throw new RuntimeException("Incorrect caller: " + c);

        }

    }

    static class Test {

        // Returns the caller of this method

        public static Class<?> test() {

            return new GetCallerClassWithDepth().getCallerClass();

        }

        // Returns the caller of this method

        public static Class<?> caller() {

            // 0: Reflection 1: Test.caller 2: main

            return sun.reflect.Reflection.getCallerClass(2);

        }

        public static void selfTest() {

            // 0: Reflection 1: Test.selfTest

            Class<?> c = sun.reflect.Reflection.getCallerClass(1);

            assertEquals(c, Test.class);

            Inner1.deep();

        }

        static class Inner1 {

            static void deep() {

                 deeper();

            }

            static void deeper() {

                 Inner2.deepest();

            }

            static class Inner2 {

                static void deepest() {

                    // 0: Reflection 1: deepest 2: deeper 3: deep 4: Test.selfTest

                    Class<?> c = sun.reflect.Reflection.getCallerClass(4);

                    assertEquals(c, Test.class);

                }

            }

        }

    }

}