Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/reflectionUtils.hpp @ 1778:eeade8e89248
Merge
author | ysr |
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date | Sat, 11 Sep 2010 11:42:09 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2005, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 // A KlassStream is an abstract stream for streaming over self, superclasses | |
26 // and (super)interfaces. Streaming is done in reverse order (subclasses first, | |
27 // interfaces last). | |
28 // | |
29 // for (KlassStream st(k, false, false); !st.eos(); st.next()) { | |
30 // klassOop k = st.klass(); | |
31 // ... | |
32 // } | |
33 | |
34 class KlassStream VALUE_OBJ_CLASS_SPEC { | |
35 protected: | |
36 instanceKlassHandle _klass; // current klass/interface iterated over | |
37 objArrayHandle _interfaces; // transitive interfaces for initial class | |
38 int _interface_index; // current interface being processed | |
39 bool _local_only; // process initial class/interface only | |
40 bool _classes_only; // process classes only (no interfaces) | |
41 int _index; | |
42 | |
43 virtual int length() const = 0; | |
44 | |
45 public: | |
46 // constructor | |
47 KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only); | |
48 | |
49 // testing | |
50 bool eos(); | |
51 | |
52 // iterating | |
53 virtual void next() = 0; | |
54 | |
55 // accessors | |
56 instanceKlassHandle klass() const { return _klass; } | |
57 int index() const { return _index; } | |
58 }; | |
59 | |
60 | |
61 // A MethodStream streams over all methods in a class, superclasses and (super)interfaces. | |
62 // Streaming is done in reverse order (subclasses first, methods in reverse order) | |
63 // Usage: | |
64 // | |
65 // for (MethodStream st(k, false, false); !st.eos(); st.next()) { | |
66 // methodOop m = st.method(); | |
67 // ... | |
68 // } | |
69 | |
70 class MethodStream : public KlassStream { | |
71 private: | |
72 int length() const { return methods()->length(); } | |
73 objArrayOop methods() const { return _klass->methods(); } | |
74 public: | |
75 MethodStream(instanceKlassHandle klass, bool local_only, bool classes_only) | |
76 : KlassStream(klass, local_only, classes_only) { | |
77 _index = length(); | |
78 next(); | |
79 } | |
80 | |
81 void next() { _index--; } | |
82 methodOop method() const { return methodOop(methods()->obj_at(index())); } | |
83 }; | |
84 | |
85 | |
86 // A FieldStream streams over all fields in a class, superclasses and (super)interfaces. | |
87 // Streaming is done in reverse order (subclasses first, fields in reverse order) | |
88 // Usage: | |
89 // | |
90 // for (FieldStream st(k, false, false); !st.eos(); st.next()) { | |
91 // symbolOop field_name = st.name(); | |
92 // ... | |
93 // } | |
94 | |
95 | |
96 class FieldStream : public KlassStream { | |
97 private: | |
98 int length() const { return fields()->length(); } | |
99 constantPoolOop constants() const { return _klass->constants(); } | |
100 protected: | |
101 typeArrayOop fields() const { return _klass->fields(); } | |
102 public: | |
103 FieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) | |
104 : KlassStream(klass, local_only, classes_only) { | |
105 _index = length(); | |
106 next(); | |
107 } | |
108 | |
109 void next() { _index -= instanceKlass::next_offset; } | |
110 | |
111 // Accessors for current field | |
112 AccessFlags access_flags() const { | |
113 AccessFlags flags; | |
114 flags.set_flags(fields()->ushort_at(index() + instanceKlass::access_flags_offset)); | |
115 return flags; | |
116 } | |
117 symbolOop name() const { | |
118 int name_index = fields()->ushort_at(index() + instanceKlass::name_index_offset); | |
119 return constants()->symbol_at(name_index); | |
120 } | |
121 symbolOop signature() const { | |
122 int signature_index = fields()->ushort_at(index() + | |
123 instanceKlass::signature_index_offset); | |
124 return constants()->symbol_at(signature_index); | |
125 } | |
126 // missing: initval() | |
127 int offset() const { | |
128 return _klass->offset_from_fields( index() ); | |
129 } | |
130 }; | |
131 | |
132 class FilteredField { | |
133 private: | |
134 klassOop _klass; | |
135 int _field_offset; | |
136 | |
137 public: | |
138 FilteredField(klassOop klass, int field_offset) { | |
139 _klass = klass; | |
140 _field_offset = field_offset; | |
141 } | |
142 klassOop klass() { return _klass; } | |
143 oop* klass_addr() { return (oop*) &_klass; } | |
144 int field_offset() { return _field_offset; } | |
145 }; | |
146 | |
147 class FilteredFieldsMap : AllStatic { | |
148 private: | |
149 static GrowableArray<FilteredField *> *_filtered_fields; | |
150 public: | |
151 static void initialize(); | |
152 static bool is_filtered_field(klassOop klass, int field_offset) { | |
153 for (int i=0; i < _filtered_fields->length(); i++) { | |
154 if (klass == _filtered_fields->at(i)->klass() && | |
155 field_offset == _filtered_fields->at(i)->field_offset()) { | |
156 return true; | |
157 } | |
158 } | |
159 return false; | |
160 } | |
161 static int filtered_fields_count(klassOop klass, bool local_only) { | |
162 int nflds = 0; | |
163 for (int i=0; i < _filtered_fields->length(); i++) { | |
164 if (local_only && klass == _filtered_fields->at(i)->klass()) { | |
165 nflds++; | |
166 } else if (klass->klass_part()->is_subtype_of(_filtered_fields->at(i)->klass())) { | |
167 nflds++; | |
168 } | |
169 } | |
170 return nflds; | |
171 } | |
172 // GC support. | |
173 static void klasses_oops_do(OopClosure* f) { | |
174 for (int i = 0; i < _filtered_fields->length(); i++) { | |
175 f->do_oop((oop*)_filtered_fields->at(i)->klass_addr()); | |
176 } | |
177 } | |
178 }; | |
179 | |
180 | |
181 // A FilteredFieldStream streams over all fields in a class, superclasses and | |
182 // (super)interfaces. Streaming is done in reverse order (subclasses first, | |
183 // fields in reverse order) | |
184 // | |
185 // Usage: | |
186 // | |
187 // for (FilteredFieldStream st(k, false, false); !st.eos(); st.next()) { | |
188 // symbolOop field_name = st.name(); | |
189 // ... | |
190 // } | |
191 | |
192 class FilteredFieldStream : public FieldStream { | |
193 private: | |
194 int _filtered_fields_count; | |
195 bool has_filtered_field() { return (_filtered_fields_count > 0); } | |
196 | |
197 public: | |
198 FilteredFieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) | |
199 : FieldStream(klass, local_only, classes_only) { | |
200 _filtered_fields_count = FilteredFieldsMap::filtered_fields_count((klassOop)klass(), local_only); | |
201 } | |
202 int field_count(); | |
203 void next() { | |
204 _index -= instanceKlass::next_offset; | |
205 if (has_filtered_field()) { | |
206 while (_index >=0 && FilteredFieldsMap::is_filtered_field((klassOop)_klass(), offset())) { | |
207 _index -= instanceKlass::next_offset; | |
208 } | |
209 } | |
210 } | |
211 }; |