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/*
* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#ifndef SHARE_VM_RUNTIME_FIELDDESCRIPTOR_HPP
#define SHARE_VM_RUNTIME_FIELDDESCRIPTOR_HPP
#include "oops/constantPoolOop.hpp"
#include "oops/klassOop.hpp"
#include "oops/oop.inline.hpp"
#include "oops/symbol.hpp"
#include "runtime/fieldType.hpp"
#include "utilities/accessFlags.hpp"
#include "utilities/constantTag.hpp"
// A fieldDescriptor describes the attributes of a single field (instance or class variable).
// It needs the class constant pool to work (because it only holds indices into the pool
// rather than the actual info).
class fieldDescriptor VALUE_OBJ_CLASS_SPEC {
private:
AccessFlags _access_flags;
int _name_index;
int _signature_index;
int _initial_value_index;
int _offset;
int _generic_signature_index;
int _index; // index into fields() array
constantPoolHandle _cp;
public:
Symbol* name() const { return _cp->symbol_at(_name_index); }
Symbol* signature() const { return _cp->symbol_at(_signature_index); }
klassOop field_holder() const { return _cp->pool_holder(); }
constantPoolOop constants() const { return _cp(); }
AccessFlags access_flags() const { return _access_flags; }
oop loader() const;
// Offset (in words) of field from start of instanceOop / klassOop
int offset() const { return _offset; }
Symbol* generic_signature() const { return (_generic_signature_index > 0 ? _cp->symbol_at(_generic_signature_index) : (Symbol*)NULL); }
int index() const { return _index; }
typeArrayOop annotations() const;
// Initial field value
bool has_initial_value() const { return _initial_value_index != 0; }
constantTag initial_value_tag() const; // The tag will return true on one of is_int(), is_long(), is_single(), is_double()
jint int_initial_value() const;
jlong long_initial_value() const;
jfloat float_initial_value() const;
jdouble double_initial_value() const;
oop string_initial_value(TRAPS) const;
// Field signature type
BasicType field_type() const { return FieldType::basic_type(signature()); }
// Access flags
bool is_public() const { return _access_flags.is_public(); }
bool is_private() const { return _access_flags.is_private(); }
bool is_protected() const { return _access_flags.is_protected(); }
bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
bool is_static() const { return _access_flags.is_static(); }
bool is_final() const { return _access_flags.is_final(); }
bool is_volatile() const { return _access_flags.is_volatile(); }
bool is_transient() const { return _access_flags.is_transient(); }
bool is_synthetic() const { return _access_flags.is_synthetic(); }
bool is_field_access_watched() const { return _access_flags.is_field_access_watched(); }
bool is_field_modification_watched() const
{ return _access_flags.is_field_modification_watched(); }
void set_is_field_access_watched(const bool value)
{ _access_flags.set_is_field_access_watched(value); }
void set_is_field_modification_watched(const bool value)
{ _access_flags.set_is_field_modification_watched(value); }
// Initialization
void initialize(klassOop k, int index);
// Print
void print_on(outputStream* st) const PRODUCT_RETURN;
void print_on_for(outputStream* st, oop obj) PRODUCT_RETURN;
};
#endif // SHARE_VM_RUNTIME_FIELDDESCRIPTOR_HPP
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