1 /*

     2  * Copyright (c) 2012, 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.

     8  *

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

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

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

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

    13  * accompanied this code).

    14  *

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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

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

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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

    21  * questions.

    22  *

    23  */

    24 

    25 #ifndef SHARE_VM_CLASSFILE_DEFAULTMETHODS_HPP

    26 #define SHARE_VM_CLASSFILE_DEFAULTMETHODS_HPP

    27 

    28 #include "runtime/handles.hpp"

    29 #include "utilities/growableArray.hpp"

    30 #include "utilities/exceptions.hpp"

    31 

    32 class InstanceKlass;

    33 class Symbol;

    34 class Method;

    35 

    36 class DefaultMethods : AllStatic {

    37  public:

    38 

    39   // Analyzes class and determines which default methods are inherited

    40   // from interfaces (and has no other implementation).  For each method

    41   // (and each different signature the method could have), create an

    42   // "overpass" method that is an instance method that redirects to the

    43   // default method.  Overpass methods are added to the methods lists for

    44   // the class.

    45   static void generate_default_methods(

    46       InstanceKlass* klass, GrowableArray<Method*>* mirandas, TRAPS);

    47 

    48 

    49   // Called during linking when an invokespecial to an direct interface

    50   // method is found.  Selects and returns a method if there is a unique

    51   // default method in the 'super_iface' part of the hierarchy which is

    52   // also a candidate default for 'this_klass'.  Otherwise throws an AME.

    53   static Method* find_super_default(

    54       Klass* this_klass, Klass* super_iface,

    55       Symbol* method_name, Symbol* method_sig, TRAPS);

    56 };

    57 

    58 #endif // SHARE_VM_CLASSFILE_DEFAULTMETHODS_HPP