root/juggler/branches/1.0/Kernel/vjDependencyManager.h

/*************** <auto-copyright.pl BEGIN do not edit this line> **************
 *
 * VR Juggler is (C) Copyright 1998, 1999, 2000, 2001, 2002
 *   by Iowa State University
 *
 * Original Authors:
 *   Allen Bierbaum, Christopher Just,
 *   Patrick Hartling, Kevin Meinert,
 *   Carolina Cruz-Neira, Albert Baker
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * -----------------------------------------------------------------
 * File:          $RCSfile$
 * Date modified: $Date$
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 *************** <auto-copyright.pl END do not edit this line> ***************/


#ifndef _VJ_DEP_MGR_H_
#define _VJ_DEP_MGR_H_
//#pragma once

#include <vjConfig.h>
#include <Kernel/vjDepChecker.h>
#include <Config/vjConfigChunk.h>
#include <typeinfo>
#include <Utils/vjSingleton.h>


//: Object used for creating devices
//!NOTE: Singleton
class vjDependencyManager
{
private:
   // Singleton so must be private
   vjDependencyManager() : mDepCheckers(), mDefaultChecker()
   {
      mDepCheckers = std::vector<vjDepChecker*>(0);
      vjASSERT(mDepCheckers.size() == 0);
      //debugDump();
   }

public:
   // Called to register a new checker with the system
   void registerChecker(vjDepChecker* checker)
   {
      vjASSERT(checker != NULL);
      mDepCheckers.push_back(checker);          // Add the checker to the list
      vjDEBUG(vjDBG_KERNEL,vjDBG_CONFIG_LVL)
              << "vjDependencyManager: Registered: "
              << std::setiosflags(std::ios::right) << std::setw(25) << std::setfill(' ') << checker->getCheckerName().c_str() << std::resetiosflags(std::ios::right)
              << "  type: " << typeid(*checker).name() << std::endl
              << vjDEBUG_FLUSH;
      debugDump();
   }



   //: Are the dependencies satisfied for the given chunk?
   //
   //!RETURNS: true - dependencies are currently satisifed for the chunk
   bool depSatisfied(vjConfigChunk* chunk)
   {
      vjASSERT(NULL != chunk);
      vjDepChecker* checker = findDepChecker(chunk);
      return checker->depSatisfied(chunk);
   }

   void debugOutDependencies(vjConfigChunk* chunk,int dbg_lvl)
   {
      vjASSERT(NULL != chunk);
      vjDepChecker* checker = findDepChecker(chunk);
      checker->debugOutDependencies(chunk,dbg_lvl);
   }

private:
   //: Returns a dependency checker for the given chunk
   //! RETURNS: If checker found, it is returned
   //+          Otherwise, it returns the default checker
   vjDepChecker* findDepChecker(vjConfigChunk* chunk);

   void debugDump();

private:
   std::vector<vjDepChecker*> mDepCheckers;     //: List of the device constructors
   vjDepChecker               mDefaultChecker;  //: The default checker

vjSingletonHeader(vjDependencyManager);
/*
public:     // ------ SINGLETON ----- ///
   //: Return singleton instance of the class
   static vjDependencyManager* instance()
   {
      if(mInstance == NULL)
      {
         mInstance = new vjDependencyManager();
      }

      return mInstance;
   }

private:
   static vjDependencyManager* mInstance;
   */
};

#endif