/*

 * 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

 * @summary Smoke-test class specializer, used to create BoundMethodHandle classes

 * @compile/module=java.base java/lang/invoke/ClassSpecializerHelper.java

 * @run testng/othervm/timeout=250 -ea -esa ClassSpecializerTest

 */

// Useful diagnostics to try:

//   -Djava.lang.invoke.MethodHandle.TRACE_RESOLVE=true

//   -Djava.lang.invoke.MethodHandle.DUMP_CLASS_FILES=true

import org.testng.annotations.*;

import java.lang.invoke.*;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

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

public class ClassSpecializerTest {

    @Test

    public void testFindSpecies() throws Throwable {

        System.out.println("testFindSpecies");

        System.out.println("test = " + SPEC_TEST);

        ArrayList<Object> args = new ArrayList<>();

        for (int key = 0; key <= Kind.MAX_KEY; key++) {

            Kind k = SpecTest.kind(key);

            System.out.println("k = " + k);

            MethodHandle mh = k.factory();

            System.out.println("k.f = " + mh);

            args.clear();

            for (Class<?> pt : mh.type().parameterList()) {

                args.add(coughUpA(pt));

            }

            args.set(0, key * 1000 + 42);

            Frob f = (Frob) mh.invokeWithArguments(args.toArray());

            assert(f.kind() == k);

            System.out.println("k.f(...) = " + f.toString());

            List<Object> l = f.asList();

            System.out.println("f.l = " + l);

            args.subList(0,1).clear();  // drop label

            assert(args.equals(l));

        }

    }

    private static Object coughUpA(Class<?> pt) throws Throwable {

        if (pt == String.class)  return "foo";

        if (pt.isArray()) return java.lang.reflect.Array.newInstance(pt.getComponentType(), 2);

        if (pt == Integer.class)  return 42;

        if (pt == Double.class)  return 3.14;

        if (pt.isAssignableFrom(List.class))

            return Arrays.asList("hello", "world", "from", pt.getSimpleName());

        return MethodHandles.zero(pt).invoke();

    }

    public static void main(String... av) throws Throwable {

        System.out.println("TEST: ClassSpecializerTest");

        new ClassSpecializerTest().testFindSpecies();

    }

}