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itkFEMObjectFactory.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkFEMObjectFactory.h,v $
00005   Language:  C++
00006   Date:      $Date: 2002/10/01 21:49:54 $
00007   Version:   $Revision: 1.9 $
00008 
00009   Copyright (c) 2002 Insight Consortium. All rights reserved.
00010   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00011 
00012      This software is distributed WITHOUT ANY WARRANTY; without even 
00013      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00014      PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 #ifndef __itkFEMFEMObjectFactory_h
00018 #define __itkFEMFEMObjectFactory_h
00019 
00020 #include "itkFastMutexLock.h"
00021 #include <string>
00022 #include <vector>
00023 
00024 namespace itk {
00025 namespace fem {
00026 
00027 
00028 
00029 
00066 template<class T>
00067 class FEMObjectFactory
00068 {
00069 
00073   typedef typename T::Pointer (*COF)();
00074 
00078   typedef std::string StrClassName;
00079 
00083   typedef std::vector<std::pair<COF,StrClassName> > COF_Array;
00084   
00085 public:
00086 
00090   static typename T::Pointer Create(int id) {
00091     return (Instance().cofs_[id].first)();
00092   }
00093 
00100   static int Register(COF f, const char *str)
00101   {
00102     int clid=-1;
00103     Instance().m_MutexLock.Lock();
00104 //  std::cout<<"OF->"<<str<<"\n";
00105     Instance().cofs_.push_back( COF_Array::value_type(f,str) );
00106     clid=Instance().cofs_.size()-1;
00107     Instance().m_MutexLock.Unlock();
00108     return clid;
00109   }
00110 
00114   static StrClassName ID2ClassName(int id)
00115   {
00116     return Instance().cofs_[id].second;
00117   }
00118 
00125   static int ClassName2ID(StrClassName str)
00126   {
00127     int j=0;
00128     for(typename COF_Array::const_iterator i=Instance().cofs_.begin(); i!=Instance().cofs_.end(); i++) {
00129       if (i->second==str) return j;
00130       j++;
00131     }
00132     return -1;
00133   }
00134 
00135 private:
00136 
00140   COF_Array cofs_;
00141 
00146   mutable SimpleFastMutexLock m_MutexLock;
00147 
00152   FEMObjectFactory();
00153 
00157   FEMObjectFactory(const FEMObjectFactory&);
00158 
00162   ~FEMObjectFactory();
00163 
00167   inline static FEMObjectFactory& Instance();
00168 
00173   static void CleanUP();
00174 
00178   static FEMObjectFactory* obj;
00179 
00180 private:
00186   class Dummy {};
00187 
00192   friend class Dummy;
00193 
00194 };
00195 
00196 
00197 template<class T>
00198 FEMObjectFactory<T>* FEMObjectFactory<T>::obj = 0;
00199 
00200 template<class T>
00201 FEMObjectFactory<T>::FEMObjectFactory() {}
00202 
00203 template<class T>
00204 FEMObjectFactory<T>::FEMObjectFactory(const FEMObjectFactory<T>&) {}
00205 
00206 template<class T>
00207 FEMObjectFactory<T>::~FEMObjectFactory() {}
00208 
00209 template<class T>
00210 FEMObjectFactory<T>& FEMObjectFactory<T>::Instance() 
00211   {
00212   if (!obj) 
00213     { 
00217     obj=new FEMObjectFactory;
00218 
00223     atexit(&CleanUP);
00224           
00225     }
00226 
00230   return *obj;
00231   }
00232 
00233 template<class T>
00234 void FEMObjectFactory<T>::CleanUP() { delete obj; }
00235 
00236 
00237 
00238 
00239 }} // end namespace itk::fem
00240 
00241 #endif // #ifndef __itkFEMFEMObjectFactory_h

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