1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 #ifndef _UNOTOOLS_ID_HELPER_HXX_ 25 #define _UNOTOOLS_ID_HELPER_HXX_ 26 27 #include <com/sun/star/uno/Sequence.hxx> 28 #include <com/sun/star/lang/XTypeProvider.hpp> 29 #include <osl/mutex.hxx> 30 #include <comphelper/stl_types.hxx> 31 #include <cppuhelper/typeprovider.hxx> 32 #include <tools/debug.hxx> 33 34 //......................................................................... 35 namespace utl 36 { 37 //......................................................................... 38 39 //========================================================================= 40 // to shorten some lines ... 41 typedef ::com::sun::star::uno::Sequence< ::com::sun::star::uno::Type > TypeSequence; 42 43 // compare to Sequences of Types 44 struct TypeSequenceLess : public ::std::binary_function<TypeSequence, TypeSequence, bool> 45 { 46 public: operator ()utl::TypeSequenceLess47 inline bool operator() (const TypeSequence& lhs, const TypeSequence& rhs) const 48 { 49 sal_Int32 nLengthLeft = lhs.getLength(); 50 sal_Int32 nLengthRight = rhs.getLength(); 51 52 // first check the two lengths 53 if (nLengthLeft < nLengthRight) 54 return sal_True; 55 if (nLengthLeft > nLengthRight) 56 return sal_False; 57 58 // both sequences have the same length -> check the type names 59 const ::com::sun::star::uno::Type* pTypesLeft = lhs.getConstArray(); 60 const ::com::sun::star::uno::Type* pTypesRight = rhs.getConstArray(); 61 for (sal_Int32 i=0; i<nLengthLeft; ++i, ++pTypesLeft, ++pTypesRight) 62 { 63 sal_Int32 nTypeNameCompare = pTypesLeft->getTypeName().compareTo(pTypesRight->getTypeName()); 64 if (nTypeNameCompare < 0) 65 return sal_True; 66 if (nTypeNameCompare > 0) 67 return sal_False; 68 } 69 70 // both sequences are equal ... 71 return sal_False; 72 } 73 }; 74 75 // declare the map 76 DECLARE_STL_MAP ( TypeSequence, 77 ::cppu::OImplementationId, 78 TypeSequenceLess, 79 MapType2Id 80 ); 81 82 //......................................................................... 83 } // namespace utl 84 //......................................................................... 85 86 //========================================================================= 87 /** defines a helper class for implementing the XTypeProvider::getImplementationId. 88 it maps sequences of ::com::sun::star::uno::Type to implementation ids 89 (which means sequences of bytes).<BR> 90 As there is no possibility to determine the time where the id's are no longer 91 needed (e.g. because the last instance of the class using this mechanism died) 92 the helper is "refcounted", i.e. there are acquire and release methods. 93 To simplify this there is a class classname##Ref which you may want to 94 use as an member of your classes. 95 <BR><BR> 96 As we don't want a global helper class which handles implementation id's 97 of components from all over the office (supposing somebody want's to use this :) 98 this is only a define. Wherever you have a "closed" area (which is small enough 99 and large enough :), see below) where diffenrent components want to use an id helper, 100 define your own one with this macro.<BR> 101 The more classes use this helper, the later redundant map entries will be 102 cleared. The less classes use it, the earlier map entries which may have 103 been reused will be cleared. 104 */ 105 #define DECLARE_IMPLEMENTATIONID_HELPER(_namespace, classname) \ 106 namespace _namespace { \ 107 class classname \ 108 { \ 109 friend class classname##Ref; \ 110 \ 111 static sal_Int32 s_nReferenced; \ 112 static void* s_pMap; \ 113 \ 114 static ::osl::Mutex s_aMutex; \ 115 \ 116 public: \ 117 static void acquire(); \ 118 static void release(); \ 119 \ 120 static ::com::sun::star::uno::Sequence< sal_Int8 > getImplementationId( \ 121 const ::com::sun::star::uno::Sequence< ::com::sun::star::uno::Type >& _rTypes); \ 122 \ 123 private: \ 124 static void implCreateMap(); \ 125 \ 126 classname() { } \ 127 }; \ 128 \ 129 /*=======================================================================*/ \ 130 class classname##Ref \ 131 { \ 132 public: \ 133 classname##Ref() { classname::acquire(); } \ 134 ~classname##Ref() { classname::release(); } \ 135 }; \ 136 \ 137 } /* _namespace */ \ 138 \ 139 140 /************************************************************************* 141 ************************************************************************** 142 *************************************************************************/ 143 144 /** implement an id helper 145 */ 146 #define IMPLEMENT_IMPLEMENTATIONID_HELPER(_namespace, classname) \ 147 namespace _namespace { \ 148 \ 149 /*=======================================================================*/ \ 150 \ 151 sal_Int32 classname::s_nReferenced(0); \ 152 void* classname::s_pMap = NULL; \ 153 ::osl::Mutex classname::s_aMutex; \ 154 \ 155 /*-----------------------------------------------------------------------*/ \ 156 void classname::acquire() \ 157 { \ 158 ::osl::MutexGuard aGuard(s_aMutex); \ 159 ++s_nReferenced; \ 160 } \ 161 \ 162 /*-----------------------------------------------------------------------*/ \ 163 void classname::release() \ 164 { \ 165 ::osl::MutexGuard aGuard(s_aMutex); \ 166 if (!--s_nReferenced) \ 167 { \ 168 delete static_cast< ::utl::MapType2Id *>( s_pMap ); \ 169 s_pMap = NULL; \ 170 } \ 171 } \ 172 \ 173 /*-----------------------------------------------------------------------*/ \ 174 ::com::sun::star::uno::Sequence< sal_Int8 > classname::getImplementationId( \ 175 const ::com::sun::star::uno::Sequence< ::com::sun::star::uno::Type >& _rTypes) \ 176 { \ 177 ::osl::MutexGuard aGuard(s_aMutex); \ 178 DBG_ASSERT(s_nReferenced, \ 179 "classname::getImplementationId : you need to hold a reference to this class in order to use it !"); \ 180 /* give the calling class a member of type classname##Ref and all is fine .... */ \ 181 \ 182 implCreateMap(); \ 183 \ 184 ::utl::MapType2Id* pMap = static_cast< ::utl::MapType2Id *>(s_pMap); \ 185 \ 186 ::cppu::OImplementationId& rId = (*pMap)[_rTypes]; \ 187 /* this will create an entry for the given type sequence, if necessary */ \ 188 \ 189 return rId.getImplementationId(); \ 190 } \ 191 \ 192 /*-----------------------------------------------------------------------*/ \ 193 void classname::implCreateMap() \ 194 { \ 195 if (s_pMap) \ 196 return; \ 197 s_pMap = new ::utl::MapType2Id(); \ 198 } \ 199 \ 200 \ 201 } /* _namespace */ \ 202 \ 203 204 205 #endif // _UNOTOOLS_ID_HELPER_HXX_ 206 207