DbHandleBase.h

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
//====================================================================
//  Pool Handle Base class definitions
//--------------------------------------------------------------------
//
//  Package    : StorageSvc  (The POOL project)
//  @author      M.Frank
//====================================================================
#ifndef POOL_DBHANDLEBASE_H
#define POOL_DBHANDLEBASE_H 1
 
// Framework include files
#include "StorageSvc/DbType.h"
 
/*
 *  POOL namespace declaration
 */
namespace pool    {
 
  template <class T> class DbHandleBase   {
  protected:
    typedef  T                       _DataType;
    typedef  DbHandleBase<_DataType> Base;
    T*                      m_ptr;
    DbType                  m_type;
 
    ~DbHandleBase() {  m_type.check();                  }
    DbHandleBase() : m_ptr(0), m_type(0)  {             }
 
    // Copy/move handled by derived classes.
    DbHandleBase (const DbHandleBase&) = delete;
    DbHandleBase (DbHandleBase&&) = delete;
    DbHandleBase& operator= (const DbHandleBase&) = delete;
    DbHandleBase& operator= (DbHandleBase&&) = delete;
 
    void setType(const DbType& typ)       { m_type=typ; }
    void setPtr(T* ptr)                   { m_ptr=ptr;  }
 
  public:
    T* operator->()               { return m_ptr;       }
    const T* operator->() const   { return m_ptr;       }
    bool operator!() const        { return !isValid();  }
    const T* ptr() const          { return m_ptr;       }
    T* ptr()                      { return m_ptr;       }
    bool isValid() const          { return 0 != m_ptr;  }
    const DbType& type() const    { return m_type;      }
  };
}       // End namespace pool
#endif  // POOL_DBHANDLEBASE_H