/* * Copyright (c) 1997, 2011, 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 _index; // the field index constantPoolHandle _cp; // update the access_flags for the field in the klass void update_klass_field_access_flag() { instanceKlass* ik = instanceKlass::cast(field_holder()); ik->field(index())->set_access_flags(_access_flags.as_short()); } FieldInfo* field() const { instanceKlass* ik = instanceKlass::cast(field_holder()); return ik->field(_index); } public: Symbol* name() const { return field()->name(_cp); } Symbol* signature() const { return field()->signature(_cp); } 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 field()->offset(); } Symbol* generic_signature() const; int index() const { return _index; } typeArrayOop 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 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