Mercurial > hg > truffle
diff src/share/vm/runtime/reflection.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | c89f86385056 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/runtime/reflection.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,162 @@ +/* + * Copyright 1997-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// 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 can_relax_access_check_for( + klassOop accessor, klassOop accesee, bool classloader_only); + + // inner class reflection + static void check_for_inner_class(instanceKlassHandle outer, instanceKlassHandle inner, 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 */ + +};