1 /*

     2  * Copyright 1998-2006 Sun Microsystems, Inc.  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.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun in the LICENSE file that accompanied this code.

    10  *

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

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

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

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

    21  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 package com.sun.tools.jdi;

    27 

    28 import com.sun.jdi.*;

    29 

    30 public class VoidValueImpl extends ValueImpl implements VoidValue {

    31 

    32     VoidValueImpl(VirtualMachine aVm) {

    33         super(aVm);

    34     }

    35 

    36     public boolean equals(Object obj) {

    37         return (obj != null) && (obj instanceof VoidValue) && super.equals(obj);

    38     }

    39 

    40     public int hashCode() {

    41         /*

    42          * TO DO: Better hash code

    43          */

    44         return 47245;

    45     }

    46 

    47     public Type type() {

    48         return vm.theVoidType();

    49     }

    50 

    51     ValueImpl prepareForAssignmentTo(ValueContainer destination)

    52                     throws InvalidTypeException {

    53         if ("void".equals(destination.typeName())) {

    54             return this;

    55         }

    56         throw new InvalidTypeException();

    57     }

    58 

    59     public String toString() {

    60         return "<void value>";

    61     }

    62 

    63     byte typeValueKey() {

    64         return JDWP.Tag.VOID;

    65     }

    66 }