/*

 * Copyright (c) 2017, 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 8046171

 * @summary Test access to private static fields between nestmates and nest-host

 *          using different flavours of named nested types using MethodHandles

 * @run main TestMethodHandles

 */

import java.lang.invoke.*;

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

import java.lang.reflect.Field;

public class TestMethodHandles {

    // private static field of nest-host for nestmates to access

    private static int priv_field;

    // public constructor so we aren't relying on private access

    public TestMethodHandles() {}

    // Methods that will access private static fields of nestmates

    // NOTE: No InnerNested calls in this test because non-static nested types

    // can't have static fields. Also no StaticIface calls as static interface

    // fields must be public (and final)

    void access_priv(TestMethodHandles o) throws Throwable {

        MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);

        priv_field = (int) mh.invoke();

        priv_field = (int) mh.invokeExact();

        mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);

        mh.invoke(2);

        mh.invokeExact(3);

    }

    void access_priv(StaticNested o) throws Throwable {

        MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);

        priv_field = (int) mh.invoke();

        priv_field = (int) mh.invokeExact();

        mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);

        mh.invoke(2);

        mh.invokeExact(3);

    }

    // The various nestmates

    static interface StaticIface {

        // Methods that will access private static fields of nestmates

        default void access_priv(TestMethodHandles o) throws Throwable {

            MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);

            int priv_field = (int) mh.invoke();

            priv_field = (int) mh.invokeExact();

            mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);

            mh.invoke(2);

            mh.invokeExact(3);

        }

        default void access_priv(StaticNested o) throws Throwable {

            MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);

            int priv_field = (int) mh.invoke();

            priv_field = (int) mh.invokeExact();

            mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);

            mh.invoke(2);

            mh.invokeExact(3);

        }

    }

    static class StaticNested {

        private static int priv_field;

        // public constructor so we aren't relying on private access

        public StaticNested() {}

        // Methods that will access private static fields of nestmates

        void access_priv(TestMethodHandles o) throws Throwable {

            MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);

            priv_field = (int) mh.invoke();

            priv_field = (int) mh.invokeExact();

            mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);

            mh.invoke(2);

            mh.invokeExact(3);

        }

        void access_priv(StaticNested o) throws Throwable {

            MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);

            priv_field = (int) mh.invoke();

            priv_field = (int) mh.invokeExact();

            mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);

            mh.invoke(2);

            mh.invokeExact(3);

        }

    }

    class InnerNested {

        // public constructor so we aren't relying on private access

        public InnerNested() {}

        void access_priv(TestMethodHandles o) throws Throwable {

            MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);

            priv_field = (int) mh.invoke();

            priv_field = (int) mh.invokeExact();

            mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);

            mh.invoke(2);

            mh.invokeExact(3);

        }

        void access_priv(StaticNested o) throws Throwable {

            MethodHandle mh = lookup().findStaticGetter(o.getClass(), "priv_field", int.class);

            priv_field = (int) mh.invoke();

            priv_field = (int) mh.invokeExact();

            mh = lookup().findStaticSetter(o.getClass(), "priv_field", int.class);

            mh.invoke(2);

            mh.invokeExact(3);

        }

    }

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

        TestMethodHandles o = new TestMethodHandles();

        StaticNested s = new StaticNested();

        InnerNested i = o.new InnerNested();

        StaticIface intf = new StaticIface() {};

        o.access_priv(new TestMethodHandles());

        o.access_priv(s);

        s.access_priv(o);

        s.access_priv(new StaticNested());

        i.access_priv(o);

        i.access_priv(s);

        intf.access_priv(o);

        intf.access_priv(s);

    }

}