1 // ***************************************************************************
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2 // BamMultiReader.h (c) 2010 Erik Garrison
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3 // Marth Lab, Department of Biology, Boston College
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4 // All rights reserved.
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5 // ---------------------------------------------------------------------------
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6 // Last modified: 22 February 2010 (EG)
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7 // ---------------------------------------------------------------------------
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8 // Functionality for simultaneously reading multiple BAM files
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9 // ***************************************************************************
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11 #ifndef BAMMULTIREADER_H
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12 #define BAMMULTIREADER_H
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17 #include <utility> // for pair
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19 using namespace std;
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21 // BamTools includes
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23 #include "BamReader.h"
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25 namespace BamTools {
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27 // index mapping reference/position pairings to bamreaders and their alignments
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28 typedef multimap<pair<int, int>, pair<BamReader*, BamAlignment*> > AlignmentIndex;
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30 class BamMultiReader {
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32 // constructor / destructor
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34 BamMultiReader(void);
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35 ~BamMultiReader(void);
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44 // ----------------------
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45 // BAM file operations
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46 // ----------------------
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50 // performs random-access jump to reference, position
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51 bool Jump(int refID, int position = 0);
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52 // opens BAM files (and optional BAM index files, if provided)
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53 //void Open(const vector<std::string&> filenames, const vector<std::string&> indexFilenames);
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54 void Open(const vector<string> filenames, bool openIndexes = true);
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55 // returns file pointers to beginning of alignments
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58 // ----------------------
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59 // access alignment data
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60 // ----------------------
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61 // updates the reference id marker to match the lower limit of our readers
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62 void UpdateReferenceID(void);
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64 // retrieves next available alignment (returns success/fail) from all files
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65 bool GetNextAlignment(BamAlignment&);
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66 // ... should this be private?
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67 bool HasOpenReaders(void);
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69 // ----------------------
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70 // access auxiliary data
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71 // ----------------------
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73 // returns unified SAM header text for all files
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74 const string GetHeaderText(void) const;
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75 // returns number of reference sequences
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76 const int GetReferenceCount(void) const;
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77 // returns vector of reference objects
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78 const BamTools::RefVector GetReferenceData(void) const;
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79 // returns reference id (used for BamMultiReader::Jump()) for the given reference name
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80 const int GetReferenceID(const std::string& refName) const;
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81 // validates that we have a congruent set of BAM files that are aligned against the same reference sequences
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82 void ValidateReaders() const;
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84 // ----------------------
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85 // BAM index operations
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86 // ----------------------
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88 // creates index for BAM files which lack them, saves to files (default = bamFilename + ".bai")
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89 bool CreateIndexes(void);
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91 //const int GetReferenceID(const string& refName) const;
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94 void PrintFilenames(void);
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95 void DumpAlignmentIndex(void);
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97 // private implementation
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100 // the set of readers and alignments which we operate on, maintained throughout the life of this class
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101 vector<pair<BamReader*, BamAlignment*> > readers;
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103 // readers and alignments sorted by reference id and position, to keep track of the lowest (next) alignment
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104 // when a reader reaches EOF, its entry is removed from this index
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105 AlignmentIndex alignments;
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107 vector<string> fileNames;
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110 } // namespace BamTools
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112 #endif // BAMMULTIREADER_H
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