/*

 * Copyright (c) 2016, 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 8081800

 * @summary Add JNI invocation tests for private interface methods

 * @run main/native PrivateInterfaceMethods

 */

public class PrivateInterfaceMethods {

    static {

        System.loadLibrary("PrivateInterfaceMethods");

    }

    static native int callIntVoid(Object target, String definingClassName, String methodName, boolean virtual);

    static interface A {

        static final int AmResult = 1;

        private int m() { return AmResult; }

    }

    static interface B extends A {

        // No m() here

    }

    static interface C extends B {

        static final int CmResult = 2;

        private int m() { return CmResult; }  // unrelated to A.m

    }

    public static class Impl implements C {

        static final int ImplmResult = 3;

        private int m() { return ImplmResult; } // unrelated to A.m or C.m

    }

    // We found that itable/vtable construction was affected by whether or not the

    // implementation class declared a method with the same signature as the

    // private interface method, so we test both variants.

    public static class Impl2 implements C {

    }

    public static void main(String[] args) {

        Impl impl = new Impl();

        // Note: JNI doesn't enforce access control so we can make

        //       private calls not possible in Java code.

        //       Also it doesn't check that the receiver is a type that

        //       defines the method!

        // test: ((A)impl).m() - should succeed

        test(impl, A.class.getName(), "m", A.AmResult, true, null);

        test(impl, A.class.getName(), "m", A.AmResult, false, null);

        // test: ((B)impl).m() - should fail: NoSuchMethodError

        test(impl, B.class.getName(), "m", -1, true, NoSuchMethodError.class);

        test(impl, B.class.getName(), "m", -1, false, NoSuchMethodError.class);

        // test: ((C)impl).m() - should succeed

        test(impl, C.class.getName(), "m", C.CmResult, true, null);

        test(impl, C.class.getName(), "m", C.CmResult, false, null);

        // test: impl.m() - should succeed

        test(impl, Impl.class.getName(), "m", Impl.ImplmResult, true, null);

        test(impl, Impl.class.getName(), "m", Impl.ImplmResult, false, null);

        // ---

        Impl2 impl2 = new Impl2();

        // test: ((A)impl2).m() - should succeed

        test(impl2, A.class.getName(), "m", A.AmResult, true, null);

        test(impl2, A.class.getName(), "m", A.AmResult, false, null);

        // test: ((B)impl2).m() - should fail: NoSuchMethodError

        test(impl2, B.class.getName(), "m", -1, true, NoSuchMethodError.class);

        test(impl2, B.class.getName(), "m", -1, false, NoSuchMethodError.class);

        // test: ((C)impl2).m() - should succeed

        test(impl2, C.class.getName(), "m", C.CmResult, true, null);

        test(impl2, C.class.getName(), "m", C.CmResult, false, null);

        // test: impl2.m() - should fail: NoSuchMethodError

        test(impl2, Impl2.class.getName(), "m", -1, true, NoSuchMethodError.class);

        test(impl2, Impl2.class.getName(), "m", -1, false, NoSuchMethodError.class);

    }

    static void test(Object target, String definingClass, String method,

                     int expected, boolean virtual, Class<?> expectedException) {

        String desc = (virtual ? "Virtual" : "Nonvirtual") + " Invocation of " +

                       definingClass + "." + method + " on instance of class " +

                       target.getClass().getName();

        try {

            int res = callIntVoid(target, definingClass, method, virtual);

            if (expectedException != null)

                throw new Error(desc + " succeeded - but expected exception " + expectedException.getSimpleName());

            if (res != expected)

                throw new Error(desc + " got wrong result: " + res + " instead of " + expected);

            System.out.println(desc + " - passed");

        }

        catch (Throwable t) {

           if (t.getClass() != expectedException)

               throw new Error(desc + " failed", t);

           else

              System.out.println(desc + " threw " + expectedException.getSimpleName() + " as expected");

        }

    }

}