/* * 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_REFLECTION_HPP #define SHARE_VM_RUNTIME_REFLECTION_HPP #include "oops/oop.hpp" #include "runtime/fieldDescriptor.hpp" #include "runtime/reflectionCompat.hpp" #include "utilities/accessFlags.hpp" #include "utilities/growableArray.hpp" // Class Reflection contains utility methods needed for implementing the // reflection api. // // Used by functions in the JVM interface. // // NOTE that in JDK 1.4 most of reflection is now implemented in Java // using dynamic bytecode generation. The Array class has not yet been // rewritten using bytecodes; if it were, most of the rest of this // class could go away, as well as a few more entry points in jvm.cpp. class FieldStream; class Reflection: public AllStatic { private: // Access checking static bool reflect_check_access(klassOop field_class, AccessFlags acc, klassOop target_class, bool is_method_invoke, TRAPS); // Conversion static klassOop basic_type_mirror_to_arrayklass(oop basic_type_mirror, TRAPS); static oop basic_type_arrayklass_to_mirror(klassOop basic_type_arrayklass, TRAPS); static objArrayHandle get_parameter_types(methodHandle method, int parameter_count, oop* return_type, TRAPS); static objArrayHandle get_exception_types(methodHandle method, TRAPS); // Creating new java.lang.reflect.xxx wrappers static Handle new_type(symbolHandle signature, KlassHandle k, TRAPS); public: // Constants defined by java reflection api classes enum SomeConstants { PUBLIC = 0, DECLARED = 1, MEMBER_PUBLIC = 0, MEMBER_DECLARED = 1, MAX_DIM = 255 }; // Boxing. Returns boxed value of appropriate type. Throws IllegalArgumentException. static oop box(jvalue* v, BasicType type, TRAPS); // Unboxing. Returns type code and sets value. static BasicType unbox_for_primitive(oop boxed_value, jvalue* value, TRAPS); static BasicType unbox_for_regular_object(oop boxed_value, jvalue* value); // Widening of basic types. Throws IllegalArgumentException. static void widen(jvalue* value, BasicType current_type, BasicType wide_type, TRAPS); // Reflective array access. Returns type code. Throws ArrayIndexOutOfBoundsException. static BasicType array_get(jvalue* value, arrayOop a, int index, TRAPS); static void array_set(jvalue* value, arrayOop a, int index, BasicType value_type, TRAPS); // Returns mirror on array element type (NULL for basic type arrays and non-arrays). static oop array_component_type(oop mirror, TRAPS); // Object creation static arrayOop reflect_new_array(oop element_mirror, jint length, TRAPS); static arrayOop reflect_new_multi_array(oop element_mirror, typeArrayOop dimensions, TRAPS); // Verification static bool verify_class_access(klassOop current_class, klassOop new_class, bool classloader_only); static bool verify_field_access(klassOop current_class, klassOop resolved_class, klassOop field_class, AccessFlags access, bool classloader_only, bool protected_restriction = false); static bool is_same_class_package(klassOop class1, klassOop class2); static bool is_same_package_member(klassOop class1, klassOop class2, TRAPS); static bool can_relax_access_check_for( klassOop accessor, klassOop accesee, bool classloader_only); // inner class reflection // raise an ICCE unless the required relationship can be proven to hold // If inner_is_member, require the inner to be a member of the outer. // If !inner_is_member, require the inner to be anonymous (a non-member). // Caller is responsible for figuring out in advance which case must be true. static void check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner, bool inner_is_member, TRAPS); // // Support for reflection based on dynamic bytecode generation (JDK 1.4) // // Create a java.lang.reflect.Method object based on a method static oop new_method(methodHandle method, bool intern_name, bool for_constant_pool_access, TRAPS); // Create a java.lang.reflect.Constructor object based on a method static oop new_constructor(methodHandle method, TRAPS); // Create a java.lang.reflect.Field object based on a field descriptor static oop new_field(fieldDescriptor* fd, bool intern_name, TRAPS); //--------------------------------------------------------------------------- // // Support for old native code-based reflection (pre-JDK 1.4) // // NOTE: the method and constructor invocation code is still used // for startup time reasons; see reflectionCompat.hpp. // //--------------------------------------------------------------------------- #ifdef SUPPORT_OLD_REFLECTION private: // method resolution for invoke static methodHandle resolve_interface_call(instanceKlassHandle klass, methodHandle method, KlassHandle recv_klass, Handle receiver, TRAPS); // Method call (shared by invoke_method and invoke_constructor) static oop invoke(instanceKlassHandle klass, methodHandle method, Handle receiver, bool override, objArrayHandle ptypes, BasicType rtype, objArrayHandle args, bool is_method_invoke, TRAPS); // Narrowing of basic types. Used to create correct jvalues for // boolean, byte, char and short return return values from interpreter // which are returned as ints. Throws IllegalArgumentException. static void narrow(jvalue* value, BasicType narrow_type, TRAPS); // Conversion static BasicType basic_type_mirror_to_basic_type(oop basic_type_mirror, TRAPS); static bool match_parameter_types(methodHandle method, objArrayHandle types, int parameter_count, TRAPS); // Creating new java.lang.reflect.xxx wrappers static oop new_field(FieldStream* st, TRAPS); public: // Field lookup and verification. static bool resolve_field(Handle field_mirror, Handle& receiver, fieldDescriptor* fd, bool check_final, TRAPS); // Reflective field access. Returns type code. Throws IllegalArgumentException. static BasicType field_get(jvalue* value, fieldDescriptor* fd, Handle receiver); static void field_set(jvalue* value, fieldDescriptor* fd, Handle receiver, BasicType value_type, TRAPS); // Reflective lookup of fields. Returns java.lang.reflect.Field instances. static oop reflect_field(oop mirror, symbolOop field_name, jint which, TRAPS); static objArrayOop reflect_fields(oop mirror, jint which, TRAPS); // Reflective lookup of methods. Returns java.lang.reflect.Method instances. static oop reflect_method(oop mirror, symbolHandle method_name, objArrayHandle types, jint which, TRAPS); static objArrayOop reflect_methods(oop mirror, jint which, TRAPS); // Reflective lookup of constructors. Returns java.lang.reflect.Constructor instances. static oop reflect_constructor(oop mirror, objArrayHandle types, jint which, TRAPS); static objArrayOop reflect_constructors(oop mirror, jint which, TRAPS); // Method invokation through java.lang.reflect.Method static oop invoke_method(oop method_mirror, Handle receiver, objArrayHandle args, TRAPS); // Method invokation through java.lang.reflect.Constructor static oop invoke_constructor(oop method_mirror, objArrayHandle args, TRAPS); #endif /* SUPPORT_OLD_REFLECTION */ }; #endif // SHARE_VM_RUNTIME_REFLECTION_HPP