annotate commons/core/parsing/MaqParser.py @ 36:44d5973c188c

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#
# Copyright INRA-URGI 2009-2010
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# This software is governed by the CeCILL license under French law and
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import re
import sys
from SMART.Java.Python.structure.Mapping import Mapping
from commons.core.parsing.MapperParser import MapperParser


class MaqParser(MapperParser):
    """A class that parses the output of Maq"""

    def __init__(self, fileName, verbosity = 0):
        super(MaqParser, self).__init__(fileName, verbosity)


    def __del__(self):
        super(MaqParser, self).__del__()


    def getFileFormats():
        return ["maq"]
    getFileFormats = staticmethod(getFileFormats)


    def skipFirstLines(self):
        pass


    def parseLine(self, line):
        m = re.search(r"^\s*(\S+)\s+(\S+)\s+(\d+)\s+([+-])\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\S+)\s+(\S+)\s*$", line)
        if m == None:
            sys.exit("\nLine %d '%s' does not have a MAQ format" % (self.currentLineNb, line))

        mapping = Mapping()

        mapping.targetInterval.setStart(int(m.group(3)))
        mapping.targetInterval.setSize(int(m.group(14)))
        mapping.targetInterval.setChromosome(m.group(2))

        mapping.queryInterval.setStart(1)
        mapping.queryInterval.setSize(int(m.group(14)))
        mapping.queryInterval.setName(m.group(1))

        mapping.setDirection(m.group(4))
        mapping.setSize(int(m.group(14)))
        mapping.setNbMismatches(int(m.group(10)))
        mapping.setRank(1)
        mapping.setNbOccurrences(int(m.group(12)) + int(m.group(13)))

        return mapping