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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: 2003/09/10 14:29:43 $
00007   Version:   $Revision: 1.12 $
00008 
00009   Copyright (c) Insight Software 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     Instance().cofs_.push_back( COF_Array::value_type(f,str) );
00105     clid = static_cast<int>( Instance().cofs_.size()-1 );
00106     Instance().m_MutexLock.Unlock();
00107     return clid;
00108   }
00109 
00113   static StrClassName ID2ClassName(int id)
00114   {
00115     return Instance().cofs_[id].second;
00116   }
00117 
00124   static int ClassName2ID(StrClassName str)
00125   {
00126     int j=0;
00127     for(typename COF_Array::const_iterator i=Instance().cofs_.begin(); i!=Instance().cofs_.end(); i++) {
00128       if (i->second==str) return j;
00129       j++;
00130     }
00131     return -1;
00132   }
00133 
00134 private:
00135 
00139   COF_Array cofs_;
00140 
00145   mutable SimpleFastMutexLock m_MutexLock;
00146 
00151   FEMObjectFactory();
00152 
00156   FEMObjectFactory(const FEMObjectFactory&);
00157 
00161   ~FEMObjectFactory();
00162 
00166   inline static FEMObjectFactory& Instance();
00167 
00172   static void CleanUP();
00173 
00177   static FEMObjectFactory* obj;
00178 
00179 private:
00185   class Dummy {};
00186 
00191   friend class Dummy;
00192 
00193 };
00194 
00195 
00196 template<class T>
00197 FEMObjectFactory<T>* FEMObjectFactory<T>::obj = 0;
00198 
00199 template<class T>
00200 FEMObjectFactory<T>::FEMObjectFactory() {}
00201 
00202 template<class T>
00203 FEMObjectFactory<T>::FEMObjectFactory(const FEMObjectFactory<T>&) {}
00204 
00205 template<class T>
00206 FEMObjectFactory<T>::~FEMObjectFactory() {}
00207 
00208 template<class T>
00209 FEMObjectFactory<T>& FEMObjectFactory<T>::Instance() 
00210   {
00211   if (!obj) 
00212     { 
00216     obj=new FEMObjectFactory;
00217 
00222     atexit(&CleanUP);
00223           
00224     }
00225 
00229   return *obj;
00230   }
00231 
00232 template<class T>
00233 void FEMObjectFactory<T>::CleanUP() { delete obj; }
00234 
00235 
00236 
00237 
00238 }} // end namespace itk::fem
00239 
00240 #endif // #ifndef __itkFEMFEMObjectFactory_h

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