/*

 * 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 8019184

 * @summary MethodHandles.catchException() fails when methods have 8 args + varargs

 */

import java.util.*;

import java.lang.invoke.*;

public class TestCatchExceptionWithVarargs {

    private static final Class<?> CLASS = TestCatchExceptionWithVarargs.class;

    private static final int MAX_MH_ARITY = 254;

    public static MethodHandle target;

    public static MethodHandle handler;

    private static Object firstArg;

    static class MyException extends Exception {

    }

    public static Object target(Object... a) throws Exception {

        if (a[0] != firstArg) {

            throw new AssertionError("first argument different than expected: " + a[0] + " != " + firstArg);

        }

        throw new MyException();

    }

    public static Object handler(Object... a) {

        if (a[0] != firstArg) {

            throw new AssertionError("first argument different than expected: " + a[0] + " != " + firstArg);

        }

        return a[0];

    }

    static {

        try {

            MethodType mtype = MethodType.methodType(Object.class, Object[].class);

            target = MethodHandles.lookup().findStatic(CLASS, "target", mtype);

            handler = MethodHandles.lookup().findStatic(CLASS, "handler", mtype);

        } catch (Exception e) {

            throw new AssertionError(e);

        }

    }

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

        List<Class<?>> ptypes = new LinkedList<>();

        ptypes.add(Object[].class);

        // We use MAX_MH_ARITY - 1 here to account for the Object[] argument.

        for (int i = 1; i < MAX_MH_ARITY - 1; i++) {

            ptypes.add(0, Object.class);

            MethodHandle targetWithArgs = target.asType(MethodType.methodType(Object.class, ptypes));

            MethodHandle handlerWithArgs = handler.asType(MethodType.methodType(Object.class, ptypes));

            handlerWithArgs = MethodHandles.dropArguments(handlerWithArgs, 0, MyException.class);

            MethodHandle gwc1 = MethodHandles.catchException(targetWithArgs, MyException.class, handlerWithArgs);

            // The next line throws an IllegalArgumentException if there is a bug.

            MethodHandle gwc2 = MethodHandles.catchException(gwc1, MyException.class, handlerWithArgs);

            // This is only to verify that the method handles can actually be invoked and do the right thing.

            firstArg = new Object();

            Object o = gwc2.asSpreader(Object[].class, ptypes.size() - 1).invoke(firstArg, new Object[i]);

            if (o != firstArg) {

                throw new AssertionError("return value different than expected: " + o + " != " + firstArg);

            }

        }

    }

}