*join all file names, driectory names and text content together*

def _join_all_filenames_and_text(
            self):
        """
        *join all file names, driectory names and text content together*
        """
        self.log.info('starting the ``_join_all_filenames_and_text`` method')

        contentString = u""
        for i in self.directoryContents:
            contentString += u"%(i)s\n" % locals()
            if os.path.isfile(os.path.join(i)):
                if i[-4:] in [".png", ".jpg", ".gif"]:
                    continue
                readFile = codecs.open(i, encoding='ISO-8859-1', mode='r')
                if ".DS_Store" in i:
                    continue
                data = readFile.read()
                contentString += u"%(data)s\n" % locals()
                readFile.close()

        self.contentString = contentString

        self.log.info('completed the ``_join_all_filenames_and_text`` method')
        return None