UriReader.h

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//==========================================================================
//  AIDA Detector description implementation 
//--------------------------------------------------------------------------
// Copyright (C) Organisation europeenne pour la Recherche nucleaire (CERN)
// All rights reserved.
//
// For the licensing terms see $DD4hepINSTALL/LICENSE.
// For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
//
// Author     : M.Frank
//
//==========================================================================
#ifndef XML_URIREADER_H
#define XML_URIREADER_H
 
// C/C++ include files
#include <string>
 
namespace dd4hep {
 
  namespace xml {
 
 
    class UriReader {
    public:
      /*  User overloaded extensions hole the information necessary 
       *  to perform the entity resolution
       *  
       *  \author   M.Frank
       *  \version  1.0
       *  \ingroup DD4HEP_XML
       */
      struct UserContext {
        UserContext() = default;
        UserContext(const UserContext&) = default;
        virtual ~UserContext() = default;
      };
    public:
      UriReader()  = default;
      virtual ~UriReader();
      virtual UserContext* context() = 0;
      virtual void blockPath(const std::string&  /* path */)  {}
      virtual bool isBlocked(const std::string& /* path */)  const  { return false; }
      virtual bool load(const std::string& system_id, std::string& data);
      virtual bool load(const std::string& system_id, UserContext* context, std::string& data) = 0;
      virtual void parserLoaded(const std::string& system_id);
      virtual void parserLoaded(const std::string& system_id, UserContext* ctxt) = 0;
    };
 
 
    class UriContextReader : public UriReader  {
    protected:
      UriReader* m_reader;
      UriReader::UserContext* m_context;
    public:
      UriContextReader(UriReader* reader, UriReader::UserContext* ctxt);
      UriContextReader(const UriContextReader& copy);
      virtual ~UriContextReader();
      virtual UserContext* context()  override  {  return m_context;  }
      virtual void blockPath(const std::string& path)  override;
      virtual bool isBlocked(const std::string& path)  const  override;
      virtual bool load(const std::string& system_id, std::string& data)  override;
      virtual bool load(const std::string& system_id, UserContext* context, std::string& data)  override;
      virtual void parserLoaded(const std::string& system_id)  override;
      virtual void parserLoaded(const std::string& system_id, UserContext* ctxt)  override;
    };
 
  }       /* End namespace xml               */
}         /* End namespace dd4hep            */
#endif // XML_URIREADER_H