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comparison src/share/vm/runtime/fieldDescriptor.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1997-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // A fieldDescriptor describes the attributes of a single field (instance or class variable).
26 // It needs the class constant pool to work (because it only holds indices into the pool
27 // rather than the actual info).
28
29 class fieldDescriptor VALUE_OBJ_CLASS_SPEC {
30 private:
31 AccessFlags _access_flags;
32 int _name_index;
33 int _signature_index;
34 int _initial_value_index;
35 int _offset;
36 int _generic_signature_index;
37 int _index; // index into fields() array
38 constantPoolHandle _cp;
39
40 public:
41 symbolOop name() const { return _cp->symbol_at(_name_index); }
42 symbolOop signature() const { return _cp->symbol_at(_signature_index); }
43 klassOop field_holder() const { return _cp->pool_holder(); }
44 constantPoolOop constants() const { return _cp(); }
45 AccessFlags access_flags() const { return _access_flags; }
46 oop loader() const;
47 // Offset (in words) of field from start of instanceOop / klassOop
48 int offset() const { return _offset; }
49 symbolOop generic_signature() const { return (_generic_signature_index > 0 ? _cp->symbol_at(_generic_signature_index) : (symbolOop)NULL); }
50 int index() const { return _index; }
51 typeArrayOop annotations() const;
52
53 // Initial field value
54 bool has_initial_value() const { return _initial_value_index != 0; }
55 constantTag initial_value_tag() const; // The tag will return true on one of is_int(), is_long(), is_single(), is_double()
56 jint int_initial_value() const;
57 jlong long_initial_value() const;
58 jfloat float_initial_value() const;
59 jdouble double_initial_value() const;
60 oop string_initial_value(TRAPS) const;
61
62 // Field signature type
63 BasicType field_type() const { return FieldType::basic_type(signature()); }
64
65 // Access flags
66 bool is_public() const { return _access_flags.is_public(); }
67 bool is_private() const { return _access_flags.is_private(); }
68 bool is_protected() const { return _access_flags.is_protected(); }
69 bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
70
71 bool is_static() const { return _access_flags.is_static(); }
72 bool is_final() const { return _access_flags.is_final(); }
73 bool is_volatile() const { return _access_flags.is_volatile(); }
74 bool is_transient() const { return _access_flags.is_transient(); }
75
76 bool is_synthetic() const { return _access_flags.is_synthetic(); }
77
78 bool is_field_access_watched() const { return _access_flags.is_field_access_watched(); }
79 bool is_field_modification_watched() const
80 { return _access_flags.is_field_modification_watched(); }
81 void set_is_field_access_watched(const bool value)
82 { _access_flags.set_is_field_access_watched(value); }
83 void set_is_field_modification_watched(const bool value)
84 { _access_flags.set_is_field_modification_watched(value); }
85
86 // Initialization
87 void initialize(klassOop k, int index);
88
89 // Print
90 void print_on(outputStream* st) const PRODUCT_RETURN;
91 void print_on_for(outputStream* st, oop obj) PRODUCT_RETURN;
92 };