view commons/core/parsing/MummerParser.py @ 36:44d5973c188c

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#
# Copyright INRA-URGI 2009-2010
# 
# This software is governed by the CeCILL license under French law and
# abiding by the rules of distribution of free software. You can use,
# modify and/ or redistribute the software under the terms of the CeCILL
# license as circulated by CEA, CNRS and INRIA at the following URL
# "http://www.cecill.info".
# 
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# modify and redistribute granted by the license, users are provided only
# with a limited warranty and the software's author, the holder of the
# economic rights, and the successive licensors have only limited
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import re
import sys
from commons.core.parsing.MapperParser import MapperParser
from SMART.Java.Python.structure.Mapping import Mapping
from SMART.Java.Python.structure.SubMapping import SubMapping

class MummerParser(MapperParser):
    """A class that parses the output of Mummer format"""

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


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


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


    def skipFirstLines(self):
        pass


    def parseLine(self, line):
        mapping = Mapping()

        subMapping = SubMapping()

        # handle header
        m = re.search(r"^>\s+(\S+)\s+Reverse\s+Len\s+=\s+(\d+)$", line)
        if m != None:
            subMapping.queryInterval.setName(m.group(1))
            subMapping.queryInterval.setSize(int(m.group(2)))
            subMapping.queryInterval.setDirection(-1)
        else:
            m = re.search(r"^>\s+(\S+)\s+Len\s+=\s+(\d+)$", line)
            if m != None:
                subMapping.queryInterval.setName(m.group(1))
                subMapping.queryInterval.setSize(int(m.group(2)))
                subMapping.queryInterval.setDirection(1)
            else :
                sys.exit("Header line %d '%s' is strange in Mummer file" % (self.currentLineNb, line))

        for line in self.handle:
            self.currentLineNb += 1
            break
        line = line.strip()

        # handle line
        m = re.search(r"^(\w+)\s+(\d+)\s+(\d+)\s+(\d+)$", line)
        if m != None:
            subMapping.targetInterval.setName(m.group(1))
            subMapping.targetInterval.setStart(int(m.group(2)))
            subMapping.queryInterval.setStart(int(m.group(3)))
            subMapping.targetInterval.setSize(int(m.group(4)))
        else:
            sys.exit("Line %d '%s' is strange in Mummer file" % (self.currentLineNb, line))

        mapping.addSubMapping(subMapping)

        return mapping