A first step to proper merging
git-svn-id: svn+ssh://localhost/home/henryk/svn/cyberflex-shell/trunk@81 f711b948-2313-0410-aaa9-d29f33439f0b
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@ -54,6 +54,9 @@ class Cardmultiplexer:
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provides support for merging some list and dictionary class attributes
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of the participating classes instead of overriding them."""
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MERGE_DICTS = ("APPLICATIONS", "COMMANDS", "STATUS_WORDS")
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MERGE_LISTS = ()
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def __init__(self, classes, *args, **kwargs):
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"""Creates a new Cardmultiplexer object.
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@ -91,10 +94,14 @@ class Cardmultiplexer:
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(newcls, delcls) = self._update_classes(list(classes), [])
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for cls in newcls:
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cls.__init__(self, *self._init_args, **self._init_kwargs)
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self._merge_attributes()
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def remove_classes(self, classes):
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"""Remove classes from this Cardmultiplexer object."""
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(newcls, delcls) = self._update_classes([], list(classes))
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self._merge_attributes()
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def _update_classes(self, addclasses, delclasses):
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"""This handles the task of figuring out which classes to actually
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@ -132,3 +139,26 @@ class Cardmultiplexer:
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self.__class__ = _classobj("Cardmultiplexer (merged)",
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tuple(classes_needed + [Cardmultiplexer]), {})
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return (diffplus,diffminus)
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def _merge_attributes(self):
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"""Update the local copy of merged attributes."""
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for attr in self.MERGE_DICTS:
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tmpdict = {}
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have_one = False
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for cls in self._classes:
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if hasattr(cls, attr):
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tmpdict.update( getattr(cls, attr) )
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have_one = True
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if have_one:
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setattr(self, attr, tmpdict)
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for attr in self.MERGE_LISTS:
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tmplist = []
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have_one = False
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for cls in self._classes:
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if hasattr(cls, attr):
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tmplist.extend( getattr(cls, attr) )
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have_one = True
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if have_one:
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setattr(self, attr, tmplist)
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