SimpleSearchEngineAlgorithm.h

Go to the documentation of this file.

// --------------------------------------------------------------------------
//                   OpenMS -- Open-Source Mass Spectrometry
// --------------------------------------------------------------------------
// Copyright The OpenMS Team -- Eberhard Karls University Tuebingen,
// ETH Zurich, and Freie Universitaet Berlin 2002-2022.
//
// This software is released under a three-clause BSD license:
//  * Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//  * Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//  * Neither the name of any author or any participating institution
//    may be used to endorse or promote products derived from this software
//    without specific prior written permission.
// For a full list of authors, refer to the file AUTHORS.
// --------------------------------------------------------------------------
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL ANY OF THE AUTHORS OR THE CONTRIBUTING
// INSTITUTIONS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// --------------------------------------------------------------------------
// $Maintainer: Timo Sachsenberg $
// $Authors: Timo Sachsenberg $
// --------------------------------------------------------------------------

#include <OpenMS/CONCEPT/ProgressLogger.h>
#include <OpenMS/DATASTRUCTURES/DefaultParamHandler.h>

#include <OpenMS/CHEMISTRY/ModifiedPeptideGenerator.h>
#include <OpenMS/KERNEL/MSExperiment.h>
#include <OpenMS/DATASTRUCTURES/StringView.h>

#include <vector>

namespace OpenMS
{

class OPENMS_DLLAPI SimpleSearchEngineAlgorithm :
  public DefaultParamHandler,
  public ProgressLogger
{
  public:
    SimpleSearchEngineAlgorithm(); 

    enum class ExitCodes
    {
      EXECUTION_OK,
      INPUT_FILE_EMPTY,
      UNEXPECTED_RESULT,
      UNKNOWN_ERROR,
      ILLEGAL_PARAMETERS
    };

    ExitCodes search(const String& in_mzML, 
      const String& in_db, 
      std::vector<ProteinIdentification>& prot_ids,
      std::vector<PeptideIdentification>& pep_ids) const;
  protected:
    void updateMembers_() override;

    struct AnnotatedHit_
    {
      StringView sequence;
      SignedSize peptide_mod_index; 
      double score = 0; 
      double prefix_fraction = 0; 
      double suffix_fraction = 0; 
      double mean_error = 0.0; 
      int isotope_error = 0;
      std::vector<PeptideHit::PeakAnnotation> fragment_annotations;

      static bool hasBetterScore(const AnnotatedHit_& a, const AnnotatedHit_& b)
      {
        if (a.score != b.score) return a.score > b.score;
        // compare the mod_index first, as it is cheaper than the strncmp() of the sequences
        // there doesn't have to be a certain ordering (that makes sense), we just need it to be thread-safe
        if (b.peptide_mod_index != a.peptide_mod_index) return a.peptide_mod_index < b.peptide_mod_index;
        return a.sequence < b.sequence;
      }
    };

    static void preprocessSpectra_(PeakMap& exp, double fragment_mass_tolerance, bool fragment_mass_tolerance_unit_ppm);

    void postProcessHits_(const PeakMap& exp, 
      std::vector<std::vector<SimpleSearchEngineAlgorithm::AnnotatedHit_> >& annotated_hits, 
      std::vector<ProteinIdentification>& protein_ids, 
      std::vector<PeptideIdentification>& peptide_ids, 
      Size top_hits,
      const ModifiedPeptideGenerator::MapToResidueType& fixed_modifications,
      const ModifiedPeptideGenerator::MapToResidueType& variable_modifications,
      Size max_variable_mods_per_peptide,
      const StringList& modifications_fixed,
      const StringList& modifications_variable,
      Int peptide_missed_cleavages,
      double precursor_mass_tolerance,
      double fragment_mass_tolerance,
      const String& precursor_mass_tolerance_unit_ppm,
      const String& fragment_mass_tolerance_unit_ppm,
      const Int precursor_min_charge,
      const Int precursor_max_charge,
      const String& enzyme,
      const String& database_name) const;

    double precursor_mass_tolerance_;
    String precursor_mass_tolerance_unit_;

    Size precursor_min_charge_;
    Size precursor_max_charge_;

    IntList precursor_isotopes_;

    double fragment_mass_tolerance_;

    String fragment_mass_tolerance_unit_;

    StringList modifications_fixed_;

    StringList modifications_variable_;

    Size modifications_max_variable_mods_per_peptide_;

    String enzyme_;

    bool decoys_;

    StringList annotate_psm_;

    Size peptide_min_size_;
    Size peptide_max_size_;
    Size peptide_missed_cleavages_;

    String peptide_motif_;

    Size report_top_hits_;
};

} // namespace