EnzymaticDigestion.h

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// --------------------------------------------------------------------------
//                   OpenMS -- Open-Source Mass Spectrometry
// --------------------------------------------------------------------------
// Copyright The OpenMS Team -- Eberhard Karls University Tuebingen,
// ETH Zurich, and Freie Universitaet Berlin 2002-2021.
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// $Maintainer: Chris Bielow, Xiao Liang $
// $Authors: Marc Sturm, Chris Bielow $
// --------------------------------------------------------------------------
 
#pragma once
 
#include <OpenMS/CONCEPT/Types.h>
#include <OpenMS/CHEMISTRY/DigestionEnzyme.h>
 
#include <boost/regex.hpp>
#include <string>
#include <vector>
 
#include <functional> // for std::function
 
namespace OpenMS
{
  class StringView; 
 
  class OPENMS_DLLAPI EnzymaticDigestion
  {
public:
    enum Specificity
    { // note: the value of the first three items is important, since some engines just report the number of required termini (0, 1, 2)
      SPEC_NONE = 0, 
      SPEC_SEMI = 1, 
      SPEC_FULL = 2, 
      SPEC_UNKNOWN = 3,
      SPEC_NOCTERM = 8, 
      SPEC_NONTERM = 9, 
      SIZE_OF_SPECIFICITY = 10
    };
    static const std::string NamesOfSpecificity[SIZE_OF_SPECIFICITY];
 
    static const std::string NoCleavage;
 
    static const std::string UnspecificCleavage;
 
    EnzymaticDigestion();
 
    virtual ~EnzymaticDigestion();
 
    Size getMissedCleavages() const;
 
    void setMissedCleavages(Size missed_cleavages);
 
    String getEnzymeName() const;
 
    virtual void setEnzyme(const DigestionEnzyme* enzyme);
 
    Specificity getSpecificity() const;
 
    void setSpecificity(Specificity spec);
 
    static Specificity getSpecificityByName(const String& name);
 
    Size digestUnmodified(const StringView& sequence, std::vector<StringView>& output, Size min_length = 1, Size max_length = 0) const;
 
    Size digestUnmodified(const StringView& sequence, std::vector<std::pair<Size,Size>>& output, Size min_length = 1, Size max_length = 0) const;
 
    bool isValidProduct(const String& protein, int pep_pos, int pep_length, bool ignore_missed_cleavages = true) const;
 
    bool filterByMissedCleavages(const String& sequence, const std::function<bool(const Int)>& filter) const;
 
protected:
 
    bool isValidProduct_(const String& sequence,
                         int pos,
                         int length,
                         bool ignore_missed_cleavages,
                         bool allow_nterm_protein_cleavage,
                         bool allow_random_asp_pro_cleavage) const;
    std::vector<int> tokenize_(const String& sequence, int start = 0, int end = -1) const;
 
    Size digestAfterTokenize_(const std::vector<int>& fragment_positions, const StringView& sequence, std::vector<StringView>& output, Size min_length = 0, Size max_length = -1) const;
    Size digestAfterTokenize_(const std::vector<int>& fragment_positions, const StringView& sequence, std::vector<std::pair<Size,Size>>& output, Size min_length = 0, Size max_length = -1) const;
 
    Size countMissedCleavages_(const std::vector<int>& cleavage_positions, Size seq_start, Size seq_end) const;
 
    Size missed_cleavages_;
 
    const DigestionEnzyme* enzyme_;
    boost::regex re_;
 
    Specificity specificity_;
  };
 
} // namespace OpenMS