DbSelect.h

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/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/
 
//====================================================================
// $Id: DbSelect.h 726071 2016-02-25 09:23:05Z krasznaa $
//
//  Package    : pool/StorageSvc (The pool framework)
//
//  @author      M.Frank
//
//====================================================================
// $Header: /cvs/PF/pool/StorageSvc/StorageSvc/DbSelect.h,v 1.9 2007/11/20 16:43:06 frankb Exp $
#ifndef POOL_DBSELECT_H
#define POOL_DBSELECT_H
 
// Framework include files
#include "PersistentDataModel/Token.h"
#include "StorageSvc/DbStatus.h"
 
// C++ include files
#include <string>
#include <typeinfo>
 
/*
 *  POOL namespace declaration
 */
namespace pool    {
 
  // Forward declaration
  class DbSelectContext;
  class DbDatabase;
  class DbContainer;
 
  class DbSelect  {
  public:
 
    struct Pointer {
      virtual ~Pointer() {}
      virtual const std::type_info& type() const = 0;
    };
    template <class T> struct Ptr : public Pointer {
      T* m_ptr;
      Ptr(T* p) : m_ptr(p)                    {                           }
      virtual ~Ptr()                          { deletePtr(m_ptr); }
      virtual const std::type_info& type() const  { return typeid(T);     }
    };
  private:
    DbSelectContext*  m_context;
    std::string  m_criteria;
    DbSelect() : m_context(0) {}
    DbSelect(const DbSelect&) = delete;
    DbSelect& operator= (const DbSelect&) = delete;
  public:
    DbSelect(const std::string& crit);
    virtual ~DbSelect();
    const std::string& criteria() const { return m_criteria; }
    Token::OID_t& link() const;
    void setStatement(Pointer* p);
    Pointer* statement() const;
    DbDatabase& database() const;
    void setDatabase(const DbDatabase& dbcH);
    DbContainer& container() const;
    void setContainer(DbContainer& cntH);
    const Guid& shapeID() const;
    void setShapeID(const Guid& id);
    DbStatus start(DbDatabase& dbH, const std::string& cntName);
    DbStatus next(Token*& refpToken);
  };
}      // End namespace pool
#endif // POOL_DBSELECT_H