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IFileManager.cxx

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// IFileManager.cxx: implementation of the IFileManager class.
//

#include "xml/IFileManager.h"
#include "xml/IFile.h"
#include "facilities/error.h"

#include <strstream>
#include <cassert>

namespace xml {
  std::vector<IFileManager::LoadParamFunc> IFileManager::s_calls;
  IFileManager* IFileManager::s_instance = 0;

  // Construction/Destruction
  
  IFileManager::IFileManager() : m_file(0)
    {
      assert(!s_instance);
      s_instance = this;
    }
  
  void IFileManager::load( IFile* file )
    {
      if (file == 0) FATAL_MACRO ("Unable to open initialization file.");
      m_file = file;
      loadParams();
    }
  
  void IFileManager::load(char *filename)
    {
      m_file = new IFile(filename);
      loadParams();
    }
  
  bool  IFileManager::loadParams( LoadParamFunc func )
    {
      static  std::vector<IFileManager::LoadParamFunc>  s_calls;
      
      if (func != 0)  s_calls.push_back(func);
      
      if ((!s_instance) || (!s_instance->m_file))       return false;
      
      // already initialized, handle the setup right now
      if (s_calls.size() > 0)   {
        // catch up on all loadParameters or similar calls
        // which were queued until an instance of the class was
        // created.
        std::vector<LoadParamFunc>::const_iterator      it = s_calls.begin();
        while (it != s_calls.end()) {
          (**it)(*s_instance->m_file);
          it++;
        }
        
        // if a re-initialization is desired, remove this line
        s_calls.clear();
      }
      return true;
    }

  void IFileManager::printOn(std::ostream& out)
    {
      if(m_file) m_file->printOn(out);
    }
  IFileManager::~IFileManager()
    {
      s_instance = 0;
      delete m_file;
    }
  
} // end namespace xml

  

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