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/// \file processes/phonon/src/G4PhononTrackMap.hh
/// \brief Implementation of the G4PhononTrackMap base class
//
// $Id: G4PhononTrackMap.cc 76503 2013-11-12 08:20:50Z gcosmo $
//
// 20131111  Move Clear() function to .cc file

#include "G4PhononTrackMap.hh"
#include "G4ThreeVector.hh"
#include "G4Track.hh"
#include <map>

namespace { const G4ThreeVector nullVec(0.,0.,0.); }	// For convenience below

// Singleton instance, must be created at first request

G4ThreadLocal G4PhononTrackMap* G4PhononTrackMap::theTrackMap = 0;


// Pseudo-constructor creates singleton instance

G4PhononTrackMap* G4PhononTrackMap::GetPhononTrackMap() {
  if (!theTrackMap) theTrackMap = new G4PhononTrackMap;
  return theTrackMap;
}

void G4PhononTrackMap::Clear() {
  theMap.clear();			// Remove all entries from map
}



// Check if specified track is already loaded

G4bool G4PhononTrackMap::Find(const G4Track* track) const {
  return (!track || theMap.find(track) != theMap.end());
}


// Remove specified track from map (used by EndTracking)

void G4PhononTrackMap::RemoveTrack(const G4Track* track) {
  TrkIDKmap::iterator entry = theMap.find(track);
  if (entry != theMap.end()) theMap.erase(entry);
}


// Update the wavevector for specified track, add track if non-existent

void G4PhononTrackMap::SetK(const G4Track* track, const G4ThreeVector& K) {
  if (track) theMap[track] = K;
}


// Access current wavevector for specified track (NULL if doesn't exist)

const G4ThreeVector& G4PhononTrackMap::GetK(const G4Track* track) const {
  TrkIDKmap::const_iterator entry = theMap.find(track);
  return (entry != theMap.end()) ? entry->second : nullVec;
}