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DbObjectGuard.h

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//====================================================================
//      DbObjectGuard definition
//--------------------------------------------------------------------
//
//      Package    : DbCnv/DbSvc ( The LHCb Offline System)
//
//  Description: Guard containing object persistency information
//
//      Author     : M.Frank
//  History    :
// +---------+----------------------------------------------+---------
// |    Date |                 Comment                      | Who     
// +---------+----------------------------------------------+---------
// | 11/07/99| Initial version                              | MF
// +---------+----------------------------------------------+---------
//====================================================================
#ifndef DBCNV_DBOBJECTGUARD_H
#define DBCNV_DBOBJECTGUARD_H 1

// STL include files
#include <string>

// Framework include files
#include "GaudiKernel/StreamBuffer.h"
#include "GaudiDb/DbOOMs.h"
#include "GaudiDb/DbVArray.h"
#include "GaudiDb/DbContainer.h"

// Forward declarations
class DbPersistent;
class DbTypeInfo;
class DbObject;
class DbLink;

class DbObjectGuard : public DbPersistentGuard  {
protected:
  mutable long                          m_refCount;
  mutable long                          m_objSize;
  mutable long                          m_size;
  mutable unsigned long                 m_oid[3];
  mutable dbVarray< dbHandle<DbLink> >  m_links;
  mutable StreamBuffer                  m_objBuff;
  mutable StreamBuffer                  m_linkBuff;
  mutable dbHandle<DbContainer>         m_container;
  mutable DbPersistent*                 m_persistent;

  virtual ~DbObjectGuard()   {
  }
public:
  typedef DbPersistent Persistent;
  DbObjectGuard(unsigned char type = TEST_StorageType, Persistent* persistent = 0)
    : m_container(type)
  {
    m_persistent   = persistent;
    m_refCount     = m_size = m_objSize = 0;
    m_oid[0] = m_oid[1] = m_oid[2] = 0xFFFFFFFF;
  }
  DbObjectGuard(unsigned char /*type*/, Persistent* persistent, const dbHandle<DbContainer>& cntH)  {
    m_container    = cntH;
    m_persistent   = persistent;
    m_refCount     = m_size = m_objSize = 0;
    m_oid[0] = m_oid[1] = m_oid[2] = 0xFFFFFFFF;
  }
  virtual unsigned long addRef()  const   {
    return ++m_refCount;
  }
  virtual unsigned long release()  const  {
    return --m_refCount;
  }
  virtual unsigned long* oid()  const   {
    return m_oid;
  }
  virtual unsigned char type()  const   {
    return m_container.type();
  }
  virtual void setContainer (const dbHandle<DbContainer>& cntH)   {
    m_container = cntH;
  }
  virtual dbHandle<DbContainer>& container()  const {
    return m_container;
  }
  virtual void setPersistent (DbPersistent* p) {
    m_persistent = p;
  }
  virtual DbPersistent* persistent()  const {
    return m_persistent;
  }
  virtual void setObjectSize(long siz)   {
    m_objSize = siz;
  }
  virtual long objectSize()  const  {
    return m_objSize;
  }
  virtual void setSize(long siz)  {
    m_size = siz;
  }
  virtual long size()  const  {
    return m_size;
  }
  virtual dbVarray< dbHandle<DbLink> >& links() const   {
    return m_links;
  }
  virtual StreamBuffer& objBuffer() const  {
    return m_objBuff;
  }
  virtual StreamBuffer& linkBuffer() const  {
    return m_linkBuff;
  }
};
#endif  // DBCNV_DBOBJECTGUARD_H

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