lang/factory.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3 #
   4 # Copyright 2007 Zuza Software Foundation
   5 #
   6 # This file is part of translate.
   7 #
   8 # translate is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # translate is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with translate; if not, write to the Free Software
  20 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21
  22 """This module provides a factory to instantiate language classes."""
  23
  24 from translate.lang import common
  25 from translate.lang import data
  26
  27 prefix = "code_"
  28
  29 def getlanguage(code):
  30     """This returns a language class.
  31
  32     @param code: The ISO 639 language code
  33     """
  34     if code:
  35         code = code.replace("-", "_")
  36     try:
  37         try:
  38             if code is None:
  39                 raise ImportError ("Can't determine language code")
  40             exec("from translate.lang import %s" % code)
  41             exec("langclass = %s.%s" % (code, code))
  42             return langclass(code)
  43         except SyntaxError, e:
  44             # Someone is probably trying to import a language of which the code
  45             # is a reserved word in python (like Icelandic (is) / Oriya (or))
  46             # The convention to handle these is to have it in a file like
  47             # code_is, for example.
  48             exec("from translate.lang import %s%s" % (prefix, code))
  49             exec("langclass = %s%s.%s%s" % (prefix, code, prefix, code))
  50             return langclass(code)
  51     except ImportError, e:
  52         if code and code.startswith(prefix):
  53             code = code[:len(prefix)]
  54         simplercode = data.simplercode(code)
  55         if simplercode:
  56             relatedlanguage = getlanguage(simplercode)
  57             if isinstance(relatedlanguage, common.Common):
  58                 relatedlanguage = relatedlanguage.__class__(code)
  59             return relatedlanguage
  60         else:
  61             return common.Common(code)