IIODataManager.h

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00001 #ifndef GAUDIUTILS_IIODATAMANAGER_H
00002 #define GAUDIUTILS_IIODATAMANAGER_H
00003 // $Id:
00004 
00005 // Framework include files
00006 #include "GaudiKernel/IInterface.h"
00007 
00008 // C++ include files
00009 #include <string>
00010 #include <vector>
00011 
00012 /*
00013  *  LHCb namespace declaration
00014  */
00015 namespace Gaudi  {
00016 
00025   class GAUDI_API IDataConnection  {
00026   protected:
00028     std::string              m_name;
00030     std::string              m_fid;
00032     std::string              m_pfn;
00034     int                      m_age;
00036     const IInterface*        m_owner;
00037   public:
00039     enum IoType   { READ=1<<1,UPDATE=1<<2,CREATE=1<<3,RECREATE=(1<<4)+(1<<3) };
00041     enum IoStatus { BAD_DATA_CONNECTION=4 };
00042   public:
00044     IDataConnection(const IInterface* own, const std::string& nam)
00045     : m_name(nam), m_owner(own) {}
00047     virtual ~IDataConnection() {}
00049     const std::string& name() const       {     return m_name;       }
00051     void setFID(const std::string& fid)   {     m_fid = fid;         }
00053     const std::string& fid() const        {     return m_fid;        }
00055     const std::string& pfn() const        {     return m_pfn;        }
00057     void setPFN(const std::string& fn)    {     m_pfn = fn;          }
00059     void ageFile()                        {     ++m_age;             }
00061     void resetAge()                       {     m_age = 0;           }
00063     int age() const                       {     return m_age;        }
00065     const IInterface* owner() const       {     return m_owner;      }
00067     virtual StatusCode connectRead() = 0;
00069     virtual StatusCode connectWrite(IoType type) = 0;
00071     virtual StatusCode disconnect() = 0;
00073     virtual bool isConnected() const = 0;
00075     virtual StatusCode read(void* const data, size_t len) = 0;
00077     virtual StatusCode write(const void* data, int len) = 0;
00079     virtual long long int seek(long long int where, int origin) = 0;
00080   };
00081 
00088   class GAUDI_API IIODataManager : virtual public IInterface {
00089   public:
00091     DeclareInterfaceID(IIODataManager,2,0);
00092 
00094     typedef IDataConnection           Connection;
00095     typedef std::vector<Connection*>  Connections;
00096     typedef Connection::IoType        IoType;
00097     enum FileType { UNKNOWN=1, PFN, LFN, FID };
00098 
00100     virtual StatusCode connectRead(bool keep_open, IDataConnection* con) = 0;
00102     virtual StatusCode connectWrite(IDataConnection* con,IoType mode=Connection::CREATE,const std::string& doctype="UNKNOWN") = 0;
00104     virtual StatusCode disconnect(IDataConnection* con) = 0;
00106     virtual Connection* connection(const std::string& dsn) const = 0;
00108     virtual Connections connections(const IInterface* owner) const = 0;
00110     virtual StatusCode read(IDataConnection* con, void* const data, size_t len) = 0;
00112     virtual StatusCode write(IDataConnection* con, const void* data, int len) = 0;
00114     virtual long long int seek(IDataConnection* con, long long int where, int origin) = 0;
00115   };
00116 }         // End namespace Gaudi
00117 #endif    // GAUDIUTILS_IIODATAMANAGER_H
Gaudi Framework, version v21r9

IIODataManager.h
