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  • Committer: Jelmer Vernooij
  • Date: 2010-12-20 11:57:14 UTC
  • mto: This revision was merged to the branch mainline in revision 5577.
  • Revision ID: jelmer@samba.org-20101220115714-2ru3hfappjweeg7q
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bzrlib/registry.py
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# Copyright (C) 2006, 2008 Canonical Ltd
 
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# Copyright (C) 2006-2010 Canonical Ltd
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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"""Classes to provide name-to-object registry-like support."""
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from bzrlib.pyutils import get_named_object
 
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class _ObjectGetter(object):
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    """Maintain a reference to an object, and return the object on request.
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        return the imported object.
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        """
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        if not self._imported:
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            self._do_import()
 
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            self._obj = get_named_object(self._module_name, self._member_name)
 
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            self._imported = True
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        return super(_LazyObjectGetter, self).get_obj()
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    def _do_import(self):
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        if self._member_name:
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            segments = self._member_name.split('.')
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            names = segments[0:1]
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        else:
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            names = [self._member_name]
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        obj = __import__(self._module_name, globals(), locals(), names)
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        if self._member_name:
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            for segment in segments:
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                obj = getattr(obj, segment)
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        self._obj = obj
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        self._imported = True
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    def __repr__(self):
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        return "<%s.%s object at %x, module=%r attribute=%r>" % (
 
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        return "<%s.%s object at %x, module=%r attribute=%r imported=%r>" % (
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            self.__class__.__module__, self.__class__.__name__, id(self),
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            self._module_name, self._member_name)
 
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            self._module_name, self._member_name, self._imported)
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class Registry(object):