jdk8-mips64-public/hotspot: src/share/vm/runtime/fieldDescriptor.hpp@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

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    22  *

    23  */

    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).

    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;

    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;

    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;

    62   // Field signature type

    63   BasicType field_type() const            { return FieldType::basic_type(signature()); }

    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(); }

    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(); }

    76   bool is_synthetic() const               { return _access_flags.is_synthetic(); }

    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); }

    86   // Initialization

    87   void initialize(klassOop k, int index);

    89   // Print

    90   void print_on(outputStream* st) const         PRODUCT_RETURN;

    91   void print_on_for(outputStream* st, oop obj)  PRODUCT_RETURN;

    92 };

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