TypeCode_Traits.h
Go to the documentation of this file.
00001 // -*- C++ -*- 00002 00003 //============================================================================= 00004 /** 00005 * @file TypeCode_Traits.h 00006 * 00007 * $Id: TypeCode_Traits.h 69182 2005-11-03 17:38:46Z ossama $ 00008 * 00009 * @author Ossama Othman <ossama@dre.vanderbilt.edu> 00010 */ 00011 //============================================================================= 00012 00013 #ifndef TAO_TYPECODE_TRAITS_H 00014 #define TAO_TYPECODE_TRAITS_H 00015 00016 #include /**/ "ace/pre.h" 00017 00018 #include "tao/CORBA_String.h" 00019 #include "tao/AnyTypeCode/TypeCode.h" 00020 00021 #if !defined (ACE_LACKS_PRAGMA_ONCE) 00022 # pragma once 00023 #endif /* ACE_LACKS_PRAGMA_ONCE */ 00024 00025 TAO_BEGIN_VERSIONED_NAMESPACE_DECL 00026 00027 namespace TAO 00028 { 00029 class Null_RefCount_Policy; 00030 class True_RefCount_Policy; 00031 00032 namespace TypeCode 00033 { 00034 00035 // enum Storage { STATIC_TYPECODE, DYNAMIC_TYPECODE }; 00036 00037 // template<Storage S> struct Traits; 00038 00039 // ---- 00040 // @@ Work around limitations in MSVC++ 6. 00041 typedef char const * STATIC_TYPECODE; 00042 typedef CORBA::String_var DYNAMIC_TYPECODE; 00043 00044 template<typename S> struct Traits; 00045 // ---- 00046 00047 template<> 00048 struct Traits<STATIC_TYPECODE> 00049 { 00050 typedef char const * string_type; 00051 00052 /** 00053 * A pointer to the @c CORBA::TypeCode_ptr rather than the 00054 * @c CORBA::TypeCode_ptr itself is stored since that address is 00055 * well-defined. We may not know the value of the 00056 * @c CORBA::TypeCode_ptr when creating a static object that 00057 * refers to it, hence the indirection. 00058 */ 00059 typedef CORBA::TypeCode_ptr const * typecode_type; 00060 00061 typedef TAO::Null_RefCount_Policy refcount_policy_type; 00062 00063 static char const * get_string (string_type const & str) 00064 { 00065 return str; 00066 } 00067 00068 static CORBA::TypeCode_ptr get_typecode (typecode_type const & tc) 00069 { 00070 return (tc == 0 ? CORBA::TypeCode::_nil () : *tc); 00071 } 00072 }; 00073 00074 template<> 00075 struct Traits<DYNAMIC_TYPECODE> 00076 { 00077 typedef CORBA::String_var string_type; 00078 typedef CORBA::TypeCode_var typecode_type; 00079 typedef TAO::True_RefCount_Policy refcount_policy_type; 00080 00081 static char const * get_string (string_type const & str) 00082 { 00083 return str.in (); 00084 } 00085 00086 static CORBA::TypeCode_ptr get_typecode (typecode_type const & tc) 00087 { 00088 return tc.in (); 00089 } 00090 }; 00091 00092 // --------------- 00093 00094 // Traits based on TypeCode type template parameters. 00095 00096 template<> 00097 struct Traits<Traits<STATIC_TYPECODE>::typecode_type> 00098 { 00099 typedef Traits<STATIC_TYPECODE>::typecode_type typecode_type; 00100 00101 static CORBA::TypeCode_ptr get_typecode (typecode_type const & tc) 00102 { 00103 return (tc == 0 ? CORBA::TypeCode::_nil () : *tc); 00104 } 00105 }; 00106 00107 template<> 00108 struct Traits<Traits<DYNAMIC_TYPECODE>::typecode_type> 00109 { 00110 typedef Traits<DYNAMIC_TYPECODE>::typecode_type typecode_type; 00111 00112 static CORBA::TypeCode_ptr get_typecode (typecode_type const & tc) 00113 { 00114 return tc.in (); 00115 } 00116 00117 }; 00118 00119 } // End namespace TypeCode 00120 } // End namespace TAO 00121 00122 TAO_END_VERSIONED_NAMESPACE_DECL 00123 00124 #include /**/ "ace/post.h" 00125 00126 #endif /* TAO_TYPECODE_TRAITS_H */
