1 /*

     2  * Copyright (c) 2011 SAP SE. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /*

    25  * @test SpreadNullArg

    26  * @bug 7141637

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

    28  *

    29  * @run main compiler.runtime.SpreadNullArg

    30  * @author volker.simonis@gmail.com

    31  */

    32 

    33 package compiler.runtime;

    34 

    35 import java.lang.invoke.MethodHandle;

    36 import java.lang.invoke.MethodHandles;

    37 import java.lang.invoke.MethodType;

    38 

    39 public class SpreadNullArg {

    40 

    41   public static void main(String args[]) {

    42 

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

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

    45     MethodHandle mh_spread_target;

    46     int result = 42;

    47 

    48     try {

    49       mh_spread_target =

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

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

    52       throw new Error("Expected IllegalArgumentException was not thrown");

    53     } catch (IllegalArgumentException e) {

    54       System.out.println("Expected exception : " + e);

    55     } catch (Throwable e) {

    56       throw new Error(e);

    57     }

    58 

    59     if (result != 42) {

    60       throw new Error("result [" + result

    61           + "] != 42 : Expected IllegalArgumentException was not thrown?");

    62     }

    63   }

    64 

    65   public static int target_spread_arg(Integer i1) {

    66     return i1.intValue();

    67   }

    68 

    69 }