SingletonRegistry.h

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// --------------------------------------------------------------------------
//                   OpenMS -- Open-Source Mass Spectrometry
// --------------------------------------------------------------------------
// Copyright The OpenMS Team -- Eberhard Karls University Tuebingen,
// ETH Zurich, and Freie Universitaet Berlin 2002-2012.
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// $Maintainer: Chris Bielow  $
// $Authors: $
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#ifndef OPENMS_CONCEPT_SINGLETONREGISTRY_H
#define OPENMS_CONCEPT_SINGLETONREGISTRY_H

#include <OpenMS/DATASTRUCTURES/String.h>
#include <OpenMS/CONCEPT/Exception.h>

#include <map>
#include <iostream>

namespace OpenMS
{
  class String;
  class FactoryBase;

  class OPENMS_DLLAPI SingletonRegistry
  {
    friend class singletonsNeedNoFriends; //some versions of gcc would warn otherwise

private:
    typedef std::map<String, FactoryBase *> Map;
    typedef Map::const_iterator MapIterator;

    virtual ~SingletonRegistry(){}

    SingletonRegistry(){}

    static SingletonRegistry * instance_()
    {
      if (!singletonRegistryInstance_)
      {
        singletonRegistryInstance_ = new SingletonRegistry();
      }
      return singletonRegistryInstance_;
    }

public:

    static FactoryBase * getFactory(const String & name)
    {
      MapIterator it = instance_()->inventory_.find(name);
      if (it != instance_()->inventory_.end())
      {
        return it->second;
      }
      else
      {
        throw Exception::InvalidValue(__FILE__, __LINE__, __PRETTY_FUNCTION__, "This Factory is not registered with SingletonRegistry!", name.c_str());
      }
    }

    static void registerFactory(const String & name, FactoryBase * instance)
    {
      instance_()->inventory_[name] = instance;
    }

    static bool isRegistered(String name)
    {
      if (instance_()->inventory_.find(name) != instance_()->inventory_.end())
      {
        return true;
      }
      return false;
    }

private:

    Map inventory_;
    static SingletonRegistry * singletonRegistryInstance_;
  };


}
#endif //OPENMS_CONCEPT_SINGLETONREGISTRY_H