XMLFileCatalog.h

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#ifndef GAUDIUTILS_XMLFILECATALOG_H
#define GAUDIUTILS_XMLFILECATALOG_H

#include "GaudiUtils/IFileCatalog.h"
#include "xercesc/dom/DOMDocument.hpp"
#include "xercesc/dom/DOMElement.hpp"
#include "xercesc/parsers/XercesDOMParser.hpp"
#include "xercesc/sax/ErrorHandler.hpp"

// Forward declarations
class IMessageSvc;

/*
 *   Gaudi namespace declaration
 */
namespace Gaudi
{

  class XMLFileCatalog : public implements<IFileCatalog>
  {
  protected:
    typedef const std::string& CSTR;

  public:
    XMLFileCatalog( CSTR url, IMessageSvc* m );
    ~XMLFileCatalog() override = default;

    std::string createFID() const override;
    CSTR connectInfo() const override { return m_file; }
    void init() override;
    void commit() override;
    void rollback() override
    {
      if ( dirty() ) init();
    }
    bool readOnly() const override { return m_rdOnly; }
    bool dirty() const override { return m_update; }
    bool existsPFN( CSTR pfn ) const override { return element( pfn, false ) != 0; }
    std::string lookupPFN( CSTR fid ) const override { return lookupFID( fid ); }
    bool existsLFN( CSTR lfn ) const override { return element( lfn, false ) != 0; }
    std::string lookupLFN( CSTR lfn ) const override { return lookupFID( lfn ); }
    bool existsFID( CSTR fid ) const override { return element( fid, false ) != 0; }
    void getPFN( CSTR fid, Files& files ) const override;
    void getLFN( CSTR fid, Files& files ) const override;
    void getFID( Strings& fids ) const override;
    void deleteFID( CSTR FileID ) const override;
    void registerPFN( CSTR fid, CSTR pfn, CSTR ftype ) const override;
    void registerLFN( CSTR fid, CSTR lfn ) const override;
    void registerFID( CSTR fid ) const override;
    void getMetaData( CSTR fid, Attributes& attr ) const override;
    std::string getMetaDataItem( CSTR fid, CSTR name ) const override;
    void setMetaData( CSTR fid, CSTR name, CSTR value ) const override;
    void dropMetaData( CSTR fid ) const override { dropMetaData( fid, "*" ); }
    void dropMetaData( CSTR fid, CSTR attr ) const override;

  private:
    xercesc::DOMDocument* getDoc( bool throw_if_no_exists = true ) const;
    std::string getfile( bool create );
    void printError( CSTR msg, bool throw_exc = true ) const;
    std::string lookupFID( CSTR lfn ) const;
    xercesc::DOMNode* element( CSTR fid, bool print_err = true ) const;
    xercesc::DOMNode* child( xercesc::DOMNode* par, CSTR tag, CSTR attr = "", CSTR val = "" ) const;
    std::pair<xercesc::DOMElement*, xercesc::DOMElement*> i_registerFID( CSTR fid ) const;
    bool m_rdOnly;
    mutable bool m_update;
    xercesc::DOMDocument* m_doc;
    std::unique_ptr<xercesc::XercesDOMParser> m_parser;
    std::unique_ptr<xercesc::ErrorHandler> m_errHdlr;
    std::string m_file;
    IMessageSvc* m_msgSvc;
  };
  std::string createGuidAsString();
} /* End namespace Gaudi                 */
#endif /* GAUDIUTILS_XMLFILECATALOG_H   */