1 /*

     2  * Copyright (c) 2008, 2011, Oracle and/or its affiliates. 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.  Oracle designates this

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

     9  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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

    23  * questions.

    24  */

    25 

    26 package java.lang.invoke;

    27 

    28 import static java.lang.invoke.MethodHandleNatives.Constants.*;

    29 

    30 /**

    31  * The flavor of method handle which emulates invokespecial or invokestatic.

    32  * @author jrose

    33  */

    34 class DirectMethodHandle extends MethodHandle {

    35     //inherited oop    vmtarget;    // methodOop or virtual class/interface oop

    36     private final int  vmindex;     // method index within class or interface

    37     { vmindex = VM_INDEX_UNINITIALIZED; }  // JVM may change this

    38 

    39     // Constructors in this class *must* be package scoped or private.

    40     DirectMethodHandle(MethodType mtype, MemberName m, boolean doDispatch, Class<?> lookupClass) {

    41         super(mtype);

    42 

    43         assert(m.isMethod() || !doDispatch && m.isConstructor());

    44         if (!m.isResolved())

    45             throw new InternalError();

    46 

    47         MethodHandleNatives.init(this, (Object) m, doDispatch, lookupClass);

    48     }

    49 

    50     boolean isValid() {

    51         return (vmindex != VM_INDEX_UNINITIALIZED);

    52     }

    53 }