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1 #
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2 # Copyright INRA-URGI 2009-2010
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3 #
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4 # This software is governed by the CeCILL license under French law and
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5 # abiding by the rules of distribution of free software. You can use,
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6 # modify and/ or redistribute the software under the terms of the CeCILL
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7 # license as circulated by CEA, CNRS and INRIA at the following URL
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8 # "http://www.cecill.info".
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9 #
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10 # As a counterpart to the access to the source code and rights to copy,
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11 # modify and redistribute granted by the license, users are provided only
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12 # with a limited warranty and the software's author, the holder of the
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13 # economic rights, and the successive licensors have only limited
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14 # liability.
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15 #
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16 # In this respect, the user's attention is drawn to the risks associated
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17 # with loading, using, modifying and/or developing or reproducing the
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18 # software by the user in light of its specific status of free software,
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19 # that may mean that it is complicated to manipulate, and that also
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20 # therefore means that it is reserved for developers and experienced
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21 # professionals having in-depth computer knowledge. Users are therefore
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22 # encouraged to load and test the software's suitability as regards their
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23 # requirements in conditions enabling the security of their systems and/or
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24 # data to be ensured and, more generally, to use and operate it in the
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25 # same conditions as regards security.
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26 #
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27 # The fact that you are presently reading this means that you have had
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28 # knowledge of the CeCILL license and that you accept its terms.
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29 #
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30 import sys
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31 from SMART.Java.Python.structure.Mapping import Mapping
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32
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33
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34 class MapperParser(object):
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35 """An interface that parses the output of a generic mapper"""
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36
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37 def __init__(self, fileName, verbosity = 0):
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38 super(MapperParser, self).__init__()
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39 self.verbosity = verbosity
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40 self.nbMappings = None
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41 self.chromosomes = None
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42 self.size = None
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43 self.currentMapping = Mapping()
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44 self.handle = open(fileName)
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45 self.currentLineNb = 0
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46 self.skipFirstLines()
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47 self.fileName = fileName
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48 self.startingPoint = self.handle.tell()
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49
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50
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51 def __del__(self):
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52 self.handle.close()
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53
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54
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55 def reset(self):
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56 self.handle.seek(self.startingPoint)
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57 self.currentLineNb = 0
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58
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59
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60 def getNextMapping(self):
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61 for line in self.handle:
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62 mapping = self.parseLine(line)
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63 self.currentLineNb += 1
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64 if mapping != None:
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65 return mapping
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66 return False
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67
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68
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69 def getIterator(self):
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70 self.reset()
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71 mapping = self.getNextMapping()
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72 while mapping:
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73 yield mapping
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74 mapping = self.getNextMapping()
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75
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76
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77 def getInfos(self):
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78 self.chromosomes = set()
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79 self.nbMappings = 0
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80 self.size = 0
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81 self.reset()
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82 if self.verbosity >= 10:
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83 print "Getting information."
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84 for mapping in self.getIterator():
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85 transcript = mapping.getTranscript()
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86 self.chromosomes.add(transcript.getChromosome())
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87 self.nbMappings += 1
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88 self.size += transcript.getSize()
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89 if self.verbosity >= 10 and self.nbMappings % 100000 == 0:
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90 sys.stdout.write(" %d mappings read\r" % (self.nbMappings))
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91 sys.stdout.flush()
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92 self.reset()
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93 if self.verbosity >= 10:
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94 print " %d mappings read" % (self.nbMappings)
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95 print "Done."
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96
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97
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98 def getNbMappings(self):
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99 if self.nbMappings != None:
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100 return self.nbMappings
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101 self.getInfos()
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102 return self.nbMappings
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103
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104
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105 def getNbItems(self):
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106 return self.getNbMappings()
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107
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108
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109 def getChromosomes(self):
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110 if self.chromosomes != None:
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111 return self.chromosomes
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112 self.getInfos()
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113 return self.chromosomes
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114
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115
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116 def getSize(self):
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117 if self.size != None:
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118 return self.size
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119 self.getInfos()
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120 return self.size
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121
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122
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123 def getNbNucleotides(self):
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124 return self.getSize()
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125
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126
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127 def setDefaultTagValue(self, name, value):
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128 for mapping in self.getIterator():
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129 mapping.setTagValue(name, value)
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