DecayForest Class Reference

Contains several DecayTree objects, which belong all to the same candidate. More...

#include <DecayForest.h>

Collaboration diagram for DecayForest:

Public Member Functions
	DecayForest (const std::string &full_decaystring, bool save_memory=true, bool removeRadiativeGammaFlag=false)
	Create a DecayForest from a full decaystring outputted by ParticleMCDecayString.
const DecayTree &	getTree (unsigned int n) const
	Return nth tree (0 is the reconstructed tree)
const DecayTree &	getReconstructedTree () const
	Get reconstructed tree.
const DecayTree &	getOriginalTree () const
	Get first valid original tree.
unsigned int	getNumberOfTrees () const
	Return number of trees.
unsigned int	getOriginalTreeNumber () const
	Return first valid original tree number.

Static Public Member Functions
static int	decayHashFloatToInt (float decayHash, float decayHashExtended)
	Convert DecayHashes outputted by ParticleMCDecayString module to an integer.

Private Attributes
std::vector< DecayTree >	forest
	vector of DecayTrees
size_t	m_first_valid_original
	The first valid DecayTree.

Detailed Description

Contains several DecayTree objects, which belong all to the same candidate.

Definition at line 24 of file DecayForest.h.

Constructor & Destructor Documentation

DecayForest()

DecayForest ( const std::string &  full_decaystring, bool  save_memory = true, bool  removeRadiativeGammaFlag = false  )

explicit

Create a DecayForest from a full decaystring outputted by ParticleMCDecayString.

Parameters

full_decaystring	full decay string
save_memory	by storing only the reconstructed and first valid original DecayTree
removeRadiativeGammaFlag	remove radiative photons from decay string. Handle with care: In the decay B+ --> e+ nu_e gamma, the gamma would be removed although this might be your signal.

Definition at line 17 of file DecayForest.cc.

{
 
  m_first_valid_original = 0;
  unsigned int start = 0;
  for (unsigned int i = 0; i < full_decaystring.size(); ++i) {
    if (full_decaystring[i] == '|') {
      forest.emplace_back(full_decaystring.substr(start, i - start), removeRadiativeGammaFlag);
      start = i + 1;
      if (save_memory and forest.back().isValid() and forest.size() > 1)
        break;
    }
  }
 
  if (not(save_memory and forest.back().isValid() and forest.size() > 1))
    forest.emplace_back(full_decaystring.substr(start, full_decaystring.size() - start), removeRadiativeGammaFlag);
 
  for (unsigned int j = 1; j < forest.size(); ++j) {
    if (forest[j].isValid()) {
      m_first_valid_original = j;
      break;
    }
  }
 
}

Member Function Documentation

decayHashFloatToInt()

int decayHashFloatToInt ( float  decayHash, float  decayHashExtended  )

static

Convert DecayHashes outputted by ParticleMCDecayString module to an integer.

Definition at line 44 of file DecayForest.cc.

{
 
  // Convert unsigned int decay hash into a float keeping the same bit pattern
  assert(sizeof(float) == sizeof(uint32_t));
 
  union convert {
    uint32_t i;
    float f;
  };
  convert bitconverter;
 
  uint64_t integer = 0;
 
  bitconverter.f = decayHash;
  integer = static_cast<uint64_t>(bitconverter.i) << 32;
  // cppcheck throws false positives here (doesn't understand this use of a union)
  //
  // cppcheck-suppress redundantAssignment
  bitconverter.f = decayHashExtended;
  integer += bitconverter.i;
 
  return integer;
 
}

getNumberOfTrees()

unsigned int getNumberOfTrees ( ) const

inline

Return number of trees.

Definition at line 58 of file DecayForest.h.

{ return forest.size(); }

getOriginalTree()

const DecayTree & getOriginalTree ( ) const

inline

Get first valid original tree.

Definition at line 48 of file DecayForest.h.

{ return forest.at(m_first_valid_original); }

getOriginalTreeNumber()

unsigned int getOriginalTreeNumber ( ) const

inline

Return first valid original tree number.

Definition at line 63 of file DecayForest.h.

{ return m_first_valid_original; }

getReconstructedTree()

const DecayTree & getReconstructedTree ( ) const

inline

Get reconstructed tree.

Definition at line 43 of file DecayForest.h.

{ return forest.at(0); }

getTree()

const DecayTree & getTree ( unsigned int  n ) const

inline

Return nth tree (0 is the reconstructed tree)

Definition at line 38 of file DecayForest.h.

{ return forest.at(n); }

Member Data Documentation

forest

std::vector<DecayTree> forest

private

vector of DecayTrees

Definition at line 66 of file DecayForest.h.

m_first_valid_original

size_t m_first_valid_original

private

The first valid DecayTree.

Definition at line 67 of file DecayForest.h.

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The documentation for this class was generated from the following files:

• analysis/utility/include/DecayForest.h
• analysis/utility/src/DecayForest.cc