Selector.h

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/***********************************************************************************\
* (c) Copyright 1998-2019 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
*                                                                                   *
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* granted to it by virtue of its status as an Intergovernmental Organization        *
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\***********************************************************************************/
//====================================================================
//  NTuple name space: Selector class definition
//--------------------------------------------------------------------
//
//  Package    : Gaudi/NTupleSvc ( The LHCb Offline System)
//  Author     : M.Frank
//
//  +---------+----------------------------------------------+--------+
//  |    Date |                 Comment                      | Who    |
//  +---------+----------------------------------------------+--------+
//  | 10/10/00| Initial version.                             | MF     |
//  +---------+----------------------------------------------+--------+
//====================================================================
#ifndef GAUDI_NTUPLESVC_SELECTOR_H
#define GAUDI_NTUPLESVC_SELECTOR_H 1

// Framework include files
#include "GaudiKernel/SelectStatement.h"

// Forward declarations
namespace NTuple {
  class Tuple;
}

namespace NTuple {

  class GAUDI_API Selector : public SelectStatement {
  protected:
    IInterface* m_parent;
    bool m_firstCall;
    StatusCode m_status;

  public:
    Selector( IInterface* svc ) : m_parent( svc ), m_firstCall( true ) {}
    virtual ~Selector() = default;
    bool firstCall() const { return m_firstCall; }
    StatusCode initResult() const { return m_status; }
    bool operator()( void* nt ) override;
    virtual bool operator()( NTuple::Tuple* nt );
    virtual StatusCode initialize( NTuple::Tuple* nt );
  };
} // namespace NTuple
#endif // GAUDI_NTUPLESVC_SELECTOR_H