1 /*

     2  * Copyright (c) 2008, 2010, 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.dyn;

    27 

    28 import java.dyn.MethodHandles.Lookup;

    29 import java.util.WeakHashMap;

    30 import sun.dyn.Access;

    31 import sun.dyn.MethodHandleImpl;

    32 import sun.dyn.util.VerifyAccess;

    33 import sun.reflect.Reflection;

    34 import static sun.dyn.MemberName.newIllegalArgumentException;

    35 

    36 /**

    37  * <em>CLASS WILL BE REMOVED FOR PFD:</em>

    38  * Static routines for controlling invokedynamic behavior.

    39  * Replaced by non-static APIs.

    40  * @author John Rose, JSR 292 EG

    41  * @deprecated This class will be removed in the Public Final Draft.

    42  */

    43 public class Linkage {

    44     private static final Access IMPL_TOKEN = Access.getToken();

    45 

    46     private Linkage() {}  // do not instantiate

    47 

    48     /**

    49      * <em>METHOD WILL BE REMOVED FOR PFD:</em>

    50      * Register a <em>bootstrap method</em> to use when linking dynamic call sites within

    51      * a given caller class.

    52      * @deprecated Use @{@link BootstrapMethod} annotations instead.

    53      */

    54     public static

    55     void registerBootstrapMethod(Class callerClass, MethodHandle bootstrapMethod) {

    56         Class callc = Reflection.getCallerClass(2);

    57         if (callc != null && !VerifyAccess.isSamePackage(callerClass, callc))

    58             throw new IllegalArgumentException("cannot set bootstrap method on "+callerClass);

    59         MethodHandleImpl.registerBootstrap(IMPL_TOKEN, callerClass, bootstrapMethod);

    60     }

    61 

    62     /**

    63      * <em>METHOD WILL BE REMOVED FOR PFD:</em>

    64      * Simplified version of {@code registerBootstrapMethod} for self-registration,

    65      * to be called from a static initializer.

    66      * @deprecated Use @{@link BootstrapMethod} annotations instead.

    67      */

    68     public static

    69     void registerBootstrapMethod(Class<?> runtime, String name) {

    70         Class callerClass = Reflection.getCallerClass(2);

    71         registerBootstrapMethodLookup(callerClass, runtime, name);

    72     }

    73 

    74     /**

    75      * <em>METHOD WILL BE REMOVED FOR PFD:</em>

    76      * Simplified version of {@code registerBootstrapMethod} for self-registration,

    77      * @deprecated Use @{@link BootstrapMethod} annotations instead.

    78      */

    79     public static

    80     void registerBootstrapMethod(String name) {

    81         Class callerClass = Reflection.getCallerClass(2);

    82         registerBootstrapMethodLookup(callerClass, callerClass, name);

    83     }

    84 

    85     private static

    86     void registerBootstrapMethodLookup(Class<?> callerClass, Class<?> runtime, String name) {

    87         Lookup lookup = new Lookup(IMPL_TOKEN, callerClass);

    88         MethodHandle bootstrapMethod;

    89         try {

    90             bootstrapMethod = lookup.findStatic(runtime, name, BOOTSTRAP_METHOD_TYPE);

    91         } catch (ReflectiveOperationException ex) {

    92             throw new IllegalArgumentException("no such bootstrap method in "+runtime+": "+name, ex);

    93         }

    94         MethodHandleImpl.registerBootstrap(IMPL_TOKEN, callerClass, bootstrapMethod);

    95     }

    96 

    97     private static final MethodType BOOTSTRAP_METHOD_TYPE

    98             = MethodType.methodType(CallSite.class,

    99                                     Class.class, String.class, MethodType.class);

   100 

   101     /**

   102      * <em>METHOD WILL BE REMOVED FOR PFD:</em>

   103      * Invalidate all <code>invokedynamic</code> call sites everywhere.

   104      * @deprecated Use {@linkplain MutableCallSite#setTarget call site target setting},

   105      * {@link MutableCallSite#syncAll call site update pushing},

   106      * and {@link SwitchPoint#guardWithTest target switching} instead.

   107      */

   108     public static

   109     Object invalidateAll() {

   110         throw new UnsupportedOperationException();

   111     }

   112 

   113     /**

   114      * <em>METHOD WILL BE REMOVED FOR PFD:</em>

   115      * Invalidate all {@code invokedynamic} call sites in the bytecodes

   116      * of any methods of the given class.

   117      * @deprecated Use {@linkplain MutableCallSite#setTarget call site target setting},

   118      * {@link MutableCallSite#syncAll call site update pushing},

   119      * and {@link SwitchPoint#guardWithTest target switching} instead.

   120      */

   121     public static

   122     Object invalidateCallerClass(Class<?> callerClass) {

   123         throw new UnsupportedOperationException();

   124     }

   125 }