ModuleFactory.h

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// $Id: ModuleFactory.h,v 1.2 2007/07/06 20:32:28 fmwk Exp $
//
//
// messier@indiana.edu
#ifndef JOBC_MODULEFACTORY_H
#define JOBC_MODULEFACTORY_H
#include <string>
#include <map>
#ifndef JOBC_MODULE_H
#include "JobControl/Module.h"
#endif

namespace jobc {
  class ModuleFactory {
  public:
    static        ModuleFactory& Instance();
    void          Insert(const char* name, ModuleMaker_t mm);
    ModuleMaker_t LookUp(const char* name);
    
  private:
    typedef std::map<std::string,ModuleMaker_t> ModMakerMap_t;
    
    ModuleFactory() { }
    ModMakerMap_t         fMakerMap; 
    static ModuleFactory* fInstance; 
  };
}

// MODULE_DECL is a macro to declare the existence of a module to a
// program
//
// Modules *MUST* provide a constructor of the form:
//
// MyModule::MyModule(const char* version) : jobcModule("MyModule", version) 
// {
// ...
// }
//
// where "version" is the version tag of the set of configuration
// parameters used to setup the module.
//
#ifndef __CINT__
#define MODULE_DECL(NAME) \
static jobc::Module* gs_Module_Maker(const char* v) { return new NAME(v); } \
class _Module_MakerHelper {\
public:\
  _Module_MakerHelper() { \
    jobc::ModuleFactory::Instance().Insert(#NAME, gs_Module_Maker);\
  }\
}; \
static _Module_MakerHelper gs_Module_MakerHelper;
#endif
//

#endif

---