text: //
  //  Copyright (C) 2003-2006 Rational Discovery LLC
  //
  //  @@ All Rights Reserved @@
  //  This file is part of the RDKit.
  //  The contents are covered by the terms of the BSD license
  //  which is included in the file license.txt, found at the root
  //  of the RDKit source tree.
  //
  #ifndef __RD_CATALOGENTRY_H__
  #define __RD_CATALOGENTRY_H__
  
  #include <iostream>
  #include <string>
  
  namespace RDCatalog {
  
  //! Abstract base class to be used to represent an entry in a Catalog
  class CatalogEntry {
   public:
    virtual ~CatalogEntry() = 0;
  
    //! sets our bit Id
    void setBitId(int bid) { d_bitId = bid; };
  
    //! returns our bit Id
    int getBitId() const { return d_bitId; };
  
    //! returns a text description of this entry
    virtual std::string getDescription() const = 0;
  
    //! serializes (pickles) to a stream
    virtual void toStream(std::ostream &ss) const = 0;
    //! returns a string with a serialized (pickled) representation
    virtual std::string Serialize() const = 0;
    //! initializes from a stream pickle
    virtual void initFromStream(std::istream &ss) = 0;
    //! initializes from a string pickle
    virtual void initFromString(const std::string &text) = 0;
  
   private:
    int d_bitId;  //!< our bit Id. This needs to be signed so that we can mark
                  //uninitialized entries.
  };
  }
  
  #endif
  