/*

 * Copyright 2011 SAP AG.  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

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 * questions.

 */

/*

 * @test SpreadNullArg

 * @bug 7141637

 * @summary  verifies that the MethodHandle spread adapter can gracefully handle null arguments.

 * @run main SpreadNullArg

 * @author volker.simonis@gmail.com

 */

import java.lang.invoke.MethodHandle;

import java.lang.invoke.MethodHandles;

import java.lang.invoke.MethodType;

public class SpreadNullArg {

  public static void main(String args[]) {

    MethodType mt_ref_arg = MethodType.methodType(int.class, Integer.class);

    MethodHandle mh_spreadInvoker = MethodHandles.spreadInvoker(mt_ref_arg, 0);

    MethodHandle mh_spread_target;

    int result = 42;

    try {

      mh_spread_target =

        MethodHandles.lookup().findStatic(SpreadNullArg.class, "target_spread_arg", mt_ref_arg);

      result = (int) mh_spreadInvoker.invokeExact(mh_spread_target, (Object[]) null);

    } catch(NullPointerException e) {

      // Expected exception - do nothing!

    } catch(Throwable e) {

      throw new Error(e);

    }

    if (result != 42) throw new Error("Expected NullPointerException was not thrown");

  }

  public static int target_spread_arg(Integer i1) {

    return i1.intValue();

  }

}