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// -*- C++ -*-
//
// ColourBase.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2011 Leif Lonnblad
//
// ThePEG is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef ThePEG_ColourBase_H
#define ThePEG_ColourBase_H
// This is the declaration of the ColourBase class.
#include "ThePEG/EventRecord/EventInfoBase.h"
#include "ThePEG/EventRecord/ColourLine.h"
namespace ThePEG {
/**
* ColourBase is the base class to be used to supply a
* Particle with information about its colour
* state. This base class supplies information about the
* <code>ColourLine</code>s to which the particle is
* connected. This should be sufficient for most uses. If any other
* info is required for a particle, it may be supplied by an object of
* a sub-class of <code>ColourBase</code>, the additional information
* would then have to be extracted by dynamically casting to the
* sub-class.
*
* @see Particle
* @see ColourLine
*/
class ColourBase: public EventInfoBase {
public:
/** ColourLine is a good friend. */
friend class ColourLine;
public:
/**
* Destructor.
*/
virtual ~ColourBase();
public:
/**
* Return the anti-colour line to which this particle is connected.
*/
tColinePtr antiColourLine() const { return theAntiColourLine; }
/**
* Return the colour line to which this particle is connected.
*/
tColinePtr colourLine() const { return theColourLine; }
/**
* Return the anti-colour lines to which this particle is
* connected. (Always only one colour line for this base class.)
*/
virtual vector<tcColinePtr> antiColourLines() const;
/**
* Return the colour lines to which this particle is
* connected. (Always only one colour line for this base class.)
*/
virtual vector<tcColinePtr> colourLines() const;
/**
* Return true if the particle is connected to the given (\a anti-)
* colour \a line.
*/
virtual bool hasColourLine(tcColinePtr line, bool anti = false) const;
/**
* Return true if the particle is connected to the given anti-colour
* \a line.
*/
bool hasAntiColourLine(tcColinePtr line) const {
return hasColourLine(line, true);
}
protected:
/**
* Set the anti-colour \a line to which this particle is connected.
*/
virtual void antiColourLine(tColinePtr line) {
theAntiColourLine = line;
}
/**
* Set the (\a anti-) colour line to which this particle is connected.
*/
virtual void colourLine(tColinePtr l, bool anti = false) {
if ( anti ) antiColourLine(l);
else theColourLine = l;
}
/**
* Remove the anti-colour \a line to which this particle is connected.
*/
virtual void removeAntiColourLine(tcColinePtr line) {
if ( antiColourLine() == line ) theAntiColourLine = tColinePtr();
}
/**
* Remove the (\a anti-) colour line to which this particle is connected.
*/
virtual void removeColourLine(tcColinePtr line, bool anti = false) {
if ( anti ) removeAntiColourLine(line);
else if ( colourLine() == line ) theColourLine = tColinePtr();
}
public:
/**
* Rebind to cloned objects. When a ColourBase is cloned, a shallow
* copy is done first, then all <code>ColourLine</code>s etc, are
* cloned, and finally this method is used to see to that the
* pointers in the cloned ColourBase points to the cloned
* <code>ColourLine</code>s etc.
*/
virtual void rebind(const EventTranslationMap & trans);
/**
* Standard function for writing to a persistent stream.
*/
void persistentOutput(PersistentOStream &) const;
/**
* Standard functions for reading from a persistent stream.
*/
void persistentInput(PersistentIStream &, int);
/**
* Standard Init function. @see Base::Init().
*/
static void Init();
/**
* Standard clone method.
*/
virtual EIPtr clone() const;
private:
/**
* The anti-colour line to which this particle is connected.
*/
ColinePtr theAntiColourLine;
/**
* The colour line to which this particle is connected.
*/
ColinePtr theColourLine;
private:
/**
* Describe concrete class with persistent data.
*/
static ClassDescription<ColourBase> initColourBase;
/**
* Private and non-existent assignment operator.
*/
ColourBase & operator=(const ColourBase &);
};
/** @cond TRAITSPECIALIZATIONS */
ThePEG_DECLARE_CLASS_TRAITS(ColourBase,EventInfoBase);
/** @endcond */
}
#endif /* ThePEG_ColourBase_H */
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