1 /*
   2  * Copyright 2008-2009 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 impl.java.dyn;
  27 
  28 import java.dyn.*;
  29 import static impl.java.dyn.MethodHandleNatives.Constants.*;
  30 
  31 /**
  32  * The flavor of method handle which emulates invokespecial or invokestatic.
  33  * @author jrose
  34  */
  35 class DirectMethodHandle extends MethodHandle {
  36     //inherited oop    vmtarget;    // methodOop or virtual class/interface oop
  37     private final int  vmindex;     // method index within class or interface
  38     { vmindex = VM_INDEX_UNINITIALIZED; }  // JVM may change this
  39 
  40     // Constructors in this class *must* be package scoped or private.
  41     DirectMethodHandle(MethodType mtype, MemberName m, boolean doDispatch, Class<?> caller) {
  42         super(Access.TOKEN, mtype);
  43 
  44         assert(m.isMethod() || !doDispatch && m.isConstructor());
  45         if (!m.isResolved())
  46             throw new InternalError();
  47         MethodHandleNatives.init(this, (Object) m, doDispatch, caller);
  48     }
  49 
  50     boolean isValid() {
  51         return (vmindex != VM_INDEX_UNINITIALIZED);
  52     }
  53 }