IRndmGen.h

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* (c) Copyright 1998-2025 CERN for the benefit of the LHCb and ATLAS collaborations *
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* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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#pragma once
 
#include <GaudiKernel/IInterface.h>
#include <string>
#include <vector>
 
// Declaration of the interface ID ( interface id, major version, minor version)
static const InterfaceID IID_IRndmBit( 150, 1, 0 );
static const InterfaceID IID_IRndmFlat( 151, 1, 0 );
static const InterfaceID IID_IRndmChi2( 152, 1, 0 );
static const InterfaceID IID_IRndmGamma( 153, 1, 0 );
static const InterfaceID IID_IRndmGauss( 154, 1, 0 );
static const InterfaceID IID_IRndmLandau( 155, 1, 0 );
static const InterfaceID IID_IRndmPoisson( 156, 1, 0 );
static const InterfaceID IID_IRndmStudentT( 157, 1, 0 );
static const InterfaceID IID_IRndmBinomial( 158, 1, 0 );
static const InterfaceID IID_IRndmExponential( 159, 1, 0 );
static const InterfaceID IID_IRndmBreitWigner( 160, 1, 0 );
static const InterfaceID IID_IRndmBreitWignerCutOff( 161, 1, 0 );
static const InterfaceID IID_IRndmDefinedPdf( 162, 1, 0 );
static const InterfaceID IID_IRndmGaussianTail( 163, 1, 0 );

class GAUDI_API IRndmGen : virtual public IInterface {
public:
  DeclareInterfaceID( IRndmGen, 2, 0 );
 
  class Param {
  protected:
    const InterfaceID m_type;
 
  public:
    Param( const InterfaceID& type = IID_IRndmFlat ) : m_type( type ) {}
    virtual ~Param() = default;
    virtual const InterfaceID& type() const { return m_type; }
    virtual Param* clone() const = 0;
  };

  virtual StatusCode initialize( const IRndmGen::Param& par ) = 0;
  virtual StatusCode finalize() = 0;
  virtual const InterfaceID& type() const = 0;
  virtual long ID() const = 0;
  virtual const IRndmGen::Param* parameters() const = 0;
  virtual double shoot() const = 0;
  virtual StatusCode shootArray( std::vector<double>& array, long howmany, long start = 0 ) const = 0;

  virtual ~IRndmGen() = default;
};