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DbContainer.h

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//====================================================================
//      DbContainer handle definitions
//--------------------------------------------------------------------
//
//      Package    : DbCnv ( The LHCb Offline System)
//      Author     : M.Frank
//====================================================================
#ifndef DBCNV_DBCONTAINER_H
#define DBCNV_DBCONTAINER_H

// Forward declarations
class ISelectStatement;
class DbLink;
class DbObject;
class DbCursor;
class DbDataBase;
class DbContainer;
class IDbContainer;
class IDbCursor;
template <class T> class dbHandle;
typedef dbHandle<DbContainer> dbHandle_DbContainer;

// Framework include files
#include "GaudiDb/DbBase.h"
#include "GaudiDb/DbTypeInfo.h"

template <> class dbHandle<DbContainer> : public dbHandleBase<DbContainer>   {
public:
  // friend class declaration
  friend class DbContainer;
  friend class DbContainerImplementation;
private:
  mutable std::string       m_name;
  mutable DbAccessMode      m_mode;
private:
  dbHandle<DbContainer> (DbContainer* ptr);
  void switchPtr(DbContainer* obj)  const;
  DbResult i_addEntry(const dbHandle<DbObject>& handle);
  DbResult i_updateEntry(const dbHandle<DbObject>& handle);
  IDbContainer* info()  const;

public:
  dbHandle () 
  : dbHandleBase<DbContainer>(), m_mode(DbOOMs::READ)  {
  }
  dbHandle(unsigned char type) 
  : dbHandleBase<DbContainer>(), m_mode(DbOOMs::READ)  {
    m_type = type;
  }
  dbHandle(const dbHandle<DbContainer>& copy)
  : dbHandleBase<DbContainer>()  {
    *this = copy;
  }
  virtual ~dbHandle()   {
    switchPtr( 0 );
  }
  dbHandle<DbContainer>& operator=(const dbHandle<DbContainer>& copy)  {
    switchPtr( copy.m_ptr );
    m_name = copy.m_name;
    m_mode = copy.m_mode;
    return *this;
  }
  const std::string& name()   const  {
    return m_name;
  }
  bool isValid()   const  {
    return 0 != m_ptr;
  }  
  long addRef()  const;
  long release()  const;
  long size()    const;
  DbAccessMode openMode()   const;
  dbHandle<DbDataBase> containedIn()    const;
  dbHandle<DbObject> find(const dbHandle<DbLink>& handle)    const;
  DbResult remove(dbHandle<DbObject>& objH);
  template <class T> DbResult addEntry(const dbHandle<T>& objH)   {
    return i_addEntry(objH);
  }
  template <class T> DbResult updateEntry(const dbHandle<T>& objH)   {
    return i_updateEntry(objH);
  }
  DbResult select(ISelectStatement* sel)  const;
  DbResult unselect()  const;
  DbResult close()    const;
  DbResult open(dbHandle<DbDataBase>& file, const std::string& name, const DbTypeInfo& info, DbAccessMode mode)   const;
  DbResult open(dbHandle<DbDataBase>& file, const std::string& name) const;
  IDbCursor* makeCursor() const;
  IOODataBase* db();
  const DbTypeInfo* typeInfo()  const;
  IMessageSvc* msgSvc();
};

#endif // DBCNV_DBCONTAINER_H

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