PeptideAndProteinQuant.h

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//                   OpenMS -- Open-Source Mass Spectrometry
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// Copyright The OpenMS Team -- Eberhard Karls University Tuebingen,
// ETH Zurich, and Freie Universitaet Berlin 2002-2017.
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// $Maintainer: Hendrik Weisser $
// $Authors: Hendrik Weisser $
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#ifndef OPENMS_ANALYSIS_QUANTITATION_PEPTIDEANDPROTEINQUANT_H
#define OPENMS_ANALYSIS_QUANTITATION_PEPTIDEANDPROTEINQUANT_H

#include <OpenMS/DATASTRUCTURES/DefaultParamHandler.h>
#include <OpenMS/KERNEL/ConsensusMap.h>
#include <OpenMS/KERNEL/FeatureMap.h>
#include <OpenMS/METADATA/PeptideIdentification.h>
#include <OpenMS/METADATA/ProteinIdentification.h>

namespace OpenMS
{
  class OPENMS_DLLAPI PeptideAndProteinQuant :
    public DefaultParamHandler
  {
public:

    typedef std::map<UInt64, double> SampleAbundances;

    struct PeptideData
    {
      std::map<Int, SampleAbundances> abundances;

      SampleAbundances total_abundances;

      std::set<String> accessions;

      Size id_count;

      PeptideData() :
        id_count(0) {}
    };

    typedef std::map<AASequence, PeptideData> PeptideQuant;

    struct ProteinData
    {
      std::map<String, SampleAbundances> abundances;

      SampleAbundances total_abundances;

      Size id_count;

      ProteinData() :
        id_count(0) {}
    };

    typedef std::map<String, ProteinData> ProteinQuant;

    struct Statistics
    {
      Size n_samples;

      Size quant_proteins, too_few_peptides;

      Size quant_peptides, total_peptides;

      Size quant_features, total_features, blank_features, ambig_features;

      Statistics() :
        n_samples(0), quant_proteins(0), too_few_peptides(0),
        quant_peptides(0), total_peptides(0), quant_features(0),
        total_features(0), blank_features(0), ambig_features(0) {}
    };

    PeptideAndProteinQuant();

    ~PeptideAndProteinQuant() {}

    void readQuantData(FeatureMap& features);

    void readQuantData(ConsensusMap& consensus);

    void readQuantData(std::vector<ProteinIdentification>& proteins,
                       std::vector<PeptideIdentification>& peptides);

    void quantifyPeptides(const std::vector<PeptideIdentification>& peptides =
                          std::vector<PeptideIdentification>());


    void quantifyProteins(const ProteinIdentification& proteins = 
                          ProteinIdentification());

    const Statistics& getStatistics();

    const PeptideQuant& getPeptideResults();

    const ProteinQuant& getProteinResults();

private:

    Statistics stats_;

    PeptideQuant pep_quant_;

    ProteinQuant prot_quant_;


    PeptideHit getAnnotation_(std::vector<PeptideIdentification>& peptides);

    void quantifyFeature_(const FeatureHandle& feature, const PeptideHit& hit);

    template <typename T>
    void orderBest_(const std::map<T, SampleAbundances> abundances,
                    std::vector<T>& result)
    {
      typedef std::pair<Size, double> PairType;
      std::multimap<PairType, T, std::greater<PairType> > order;
      for (typename std::map<T, SampleAbundances>::const_iterator ab_it =
             abundances.begin(); ab_it != abundances.end(); ++ab_it)
      {
        double total = 0.0;
        for (SampleAbundances::const_iterator samp_it = ab_it->second.begin();
             samp_it != ab_it->second.end(); ++samp_it)
        {
          total += samp_it->second;
        }
        if (total <= 0.0) continue;         // not quantified
        PairType key = std::make_pair(ab_it->second.size(), total);
        order.insert(std::make_pair(key, ab_it->first));
      }
      result.clear();
      for (typename std::multimap<PairType, T, std::greater<PairType> >::
           iterator ord_it = order.begin(); ord_it != order.end(); ++ord_it)
      {
        result.push_back(ord_it->second);
      }
    }

    void normalizePeptides_();

    String getAccession_(const std::set<String>& pep_accessions,
                         std::map<String, String>& accession_to_leader);

    void countPeptides_(std::vector<PeptideIdentification>& peptides);

    void updateMembers_();

  };   // class

} // namespace

#endif // OPENMS_ANALYSIS_QUANTITATION_PEPTIDEANDPROTEINQUANT_H