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 * 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.

 *

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 */

/*

 * @test

 * @bug 8046171

 * @summary Test that private Lookup works for both nestmate-enabled classes

 * and legacy classes

 * @compile TestPrivateLookup.java

 * @run main TestPrivateLookup

 * @compile -source 10 -target 10 TestPrivateLookup.java

 * @run main TestPrivateLookup noNestmates

 */

// Need the explicit first @compile above so that jtreg forces recompilation

// with latest version. Otherwise compile-on-demand sees the JDK 10 version

// and assumes it is up to date and then runs the test using that version -

// which fails.

import java.lang.invoke.*;

import static java.lang.invoke.MethodHandles.*;

import static java.lang.invoke.MethodType.*;

public class TestPrivateLookup {

    static boolean compiledForNestmates;

    static class C {

        static class D {

            private void m() { }

        }

        static void test() throws Throwable {

            MethodType M_T = MethodType.methodType(void.class);

            // Direct lookup from C

            Lookup l = lookup();

            try {

                MethodHandle mh = l.findVirtual(D.class, "m", M_T);

                if (compiledForNestmates) {

                    System.out.println("Lookup of D.m from C succeeded as expected with nestmates");

                }

                else {

                    throw new Error("Unexpected success when not compiled for nestmates!");

                }

            }

            catch (IllegalAccessException iae) {

                if (!compiledForNestmates) {

                    System.out.println("Lookup of D.m from C failed as expected without nestmates");

                }

                else {

                    throw new Error("Unexpected failure with nestmates", iae);

                }

            }

            // switch lookup class to D

            l = l.in(D.class);

            try {

                MethodHandle mh = l.findVirtual(D.class, "m", M_T);

                System.out.println("Lookup of D.m from D succeeded as expected" +

                                   " with" + (compiledForNestmates ? "" : "out") +

                                   " nestmates");

            }

            catch (IllegalAccessException iae) {

                throw new Error("Lookup of D.m from D failed", iae);

            }

        }

    }

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

        // If there's no nesthost attribute A.getNestHost() == A

        compiledForNestmates = C.D.class.getNestHost() == TestPrivateLookup.class;

        // sanity check

        boolean expectingNestmates = args.length == 0;

        if (compiledForNestmates && !expectingNestmates) {

            throw new Error("Test is being run incorrectly: " +

                            "nestmates are being used but not expected");

        }

        if (expectingNestmates && !compiledForNestmates) {

            throw new Error("Test is being run incorrectly: " +

                            "nestmates are expected but not being used");

        }

        System.out.println("Testing with" + (expectingNestmates ? "" : "out") +

                           " nestmates");

        C.test();

    }

}