1/*
2* Copyright (c) 2015, 2016, 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.
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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
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23*/
24
25#ifndef SHARE_VM_CLASSFILE_KLASSFACTORY_HPP
26#define SHARE_VM_CLASSFILE_KLASSFACTORY_HPP
27
28#include "memory/allocation.inline.hpp"
29#include "runtime/handles.hpp"
30
31class ClassFileStream;
32class ClassLoaderData;
33template <typename>
34class GrowableArray;
35class Klass;
36class Symbol;
37class TempNewSymbol;
38
39/*
40 * KlassFactory is an interface to implementations of the following mapping/function:
41 *
42 * Summary: create a VM internal runtime representation ("Klass")
43            from a bytestream (classfile).
44 *
45 * Input:  a named bytestream in the Java class file format (see JVMS, chapter 4).
46 * Output: a VM runtime representation of a Java class
47 *
48 * Pre-conditions:
49 *   a non-NULL ClassFileStream* // the classfile bytestream
50 *   a non-NULL Symbol*          // the name of the class
51 *   a non-NULL ClassLoaderData* // the metaspace allocator
52 *   (no pending exceptions)
53 *
54 * Returns:
55 *   if the returned value is non-NULL, that value is an indirection (pointer/handle)
56 *   to a Klass. The caller will not have a pending exception.
57 *
58 *   On broken invariants and/or runtime errors the returned value will be
59 *   NULL (or a NULL handle) and the caller *might* now have a pending exception.
60 *
61 */
62
63class KlassFactory : AllStatic {
64
65  // approved clients
66  friend class ClassLoader;
67  friend class ClassLoaderExt;
68  friend class SystemDictionary;
69
70 private:
71  static instanceKlassHandle create_from_stream(ClassFileStream* stream,
72                                                Symbol* name,
73                                                ClassLoaderData* loader_data,
74                                                Handle protection_domain,
75                                                const InstanceKlass* host_klass,
76                                                GrowableArray<Handle>* cp_patches,
77                                                TRAPS);
78 public:
79  static instanceKlassHandle check_shared_class_file_load_hook(
80                                          instanceKlassHandle ik,
81                                          Symbol* class_name,
82                                          Handle class_loader,
83                                          Handle protection_domain, TRAPS);
84};
85
86#endif // SHARE_VM_CLASSFILE_KLASSFACTORY_HPP
87