#
# Copyright INRA-URGI 2009-2010
# 
# This software is governed by the CeCILL license under French law and
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# modify and/ or redistribute the software under the terms of the CeCILL
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from commons.core.writer.SequenceListWriter import SequenceListWriter


class FastaWriter(SequenceListWriter):
    """
    A class that writes a sequence list into a file with FASTA format
    @ivar fileName: name of the file 
    @type fileName: string
    @ivar handle: handle to the file
    @type handle: file handle
    @ivar header: first lines of the file
    @type header: string
    """


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

    @staticmethod
    def getFileFormats():
        """
        Get the format of the file
        """
        return ["fasta", "mfa"]


    @staticmethod
    def getExtension():
        """
        Get the usual extension for the file
        """
        return "fasta"
        
        
    def getLine(self, sequence):
        """
        Convert a sequence
        @param sequence: sequence to be written
        @type    sequence: class L{Sequence<Sequence>}
        """
        return sequence.printFasta()