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    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   }

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