#
# 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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# software by the user in light of its specific status of free software,
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from commons.core.writer.TranscriptListWriter import TranscriptListWriter


class Gff2Writer(TranscriptListWriter):
    """
    A class that writes a transcript list into a file with GFF2 format
    @ivar fileName: name of the file 
    @type fileName: string
    @ivar handle: handle to the file
    @type handle: file handle
    """


    def __init__(self, fileName, verbosity = 0):
        """
        Constructor
        @param fileName: name of the file 
        @type fileName: string
        @param verbosity: verbosity
        @type verbosity: int
        """
        self.header = ""
        self.title = ""
        super(Gff2Writer, self).__init__(fileName, verbosity)
            

    @staticmethod
    def getFileFormats():
        """
        Get the format of the file
        """
        return ["gff2"]
        
        
    @staticmethod
    def getExtension():
        """
        Get the usual extension for the file
        """
        return "gff2"
        
        
    def setTitle(self, title):
        """
        Set the title of the transcripts
        @param title: the title of the transcripts
        @type    title: string
        """
        self.title = title


    def printTranscript(self, transcript):
        """
        Export the given transcript with GFF2 format
        @param transcript: transcript to be printed
        @type transcript: class L{Transcript<Transcript>}
        @return: a string
        """
        return transcript.printGff2(self.title)