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/*
* Copyright (c) 1997, 2013, 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/constantPool.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 _index; // the field index
constantPoolHandle _cp;
// update the access_flags for the field in the klass
void update_klass_field_access_flag() {
InstanceKlass* ik = field_holder();
ik->field(index())->set_access_flags(_access_flags.as_short());
}
FieldInfo* field() const {
InstanceKlass* ik = field_holder();
return ik->field(_index);
}
public:
fieldDescriptor() {
DEBUG_ONLY(_index = badInt);
}
fieldDescriptor(InstanceKlass* ik, int index) {
DEBUG_ONLY(_index = badInt);
reinitialize(ik, index);
}
Symbol* name() const {
return field()->name(_cp);
}
Symbol* signature() const {
return field()->signature(_cp);
}
InstanceKlass* field_holder() const { return _cp->pool_holder(); }
ConstantPool* constants() const { return _cp(); }
AccessFlags access_flags() const { return _access_flags; }
oop loader() const;
// Offset (in words) of field from start of instanceOop / Klass*
int offset() const { return field()->offset(); }
Symbol* generic_signature() const;
int index() const { return _index; }
AnnotationArray* annotations() const;
AnnotationArray* type_annotations() const;
// Initial field value
bool has_initial_value() const { return field()->initval_index() != 0; }
int initial_value_index() const { return field()->initval_index(); }
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(); }
bool has_generic_signature() const { return access_flags().field_has_generic_signature(); }
void set_is_field_access_watched(const bool value) {
_access_flags.set_is_field_access_watched(value);
update_klass_field_access_flag();
}
void set_is_field_modification_watched(const bool value) {
_access_flags.set_is_field_modification_watched(value);
update_klass_field_access_flag();
}
// Initialization
void reinitialize(InstanceKlass* ik, int index);
// Print
void print() { print_on(tty); }
void print_on(outputStream* st) const PRODUCT_RETURN;
void print_on_for(outputStream* st, oop obj) PRODUCT_RETURN;
void verify() const PRODUCT_RETURN;
};
#endif // SHARE_VM_RUNTIME_FIELDDESCRIPTOR_HPP
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