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  • Committer: John Arbash Meinel
  • Date: 2006-09-12 17:33:23 UTC
  • mto: This revision was merged to the branch mainline in revision 2004.
  • Revision ID: john@arbash-meinel.com-20060912173323-112d28652516fd94
Raise an exception when ScopeReplacer has been misused

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bzrlib/lazy_import.py
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import re
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import sys
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from bzrlib import (
 
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    errors,
 
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    )
 
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class ScopeReplacer(object):
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    """A lazy object that will replace itself in the appropriate scope.
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    def _replace(self):
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        """Actually replace self with other in the given scope"""
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        factory = object.__getattribute__(self, '_factory')
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        scope = object.__getattribute__(self, '_scope')
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        name = object.__getattribute__(self, '_name')
 
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        try:
 
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            factory = object.__getattribute__(self, '_factory')
 
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            scope = object.__getattribute__(self, '_scope')
 
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        except AttributeError, e:
 
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            # Because ScopeReplacer objects only replace a single
 
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            # item, passing them to another variable before they are
 
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            # replaced would cause them to keep getting replaced
 
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            # (only they are replacing the wrong variable). So we
 
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            # make it forbidden, and try to give a good error.
 
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            raise errors.IllegalUseOfScopeReplacer(
 
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                name, msg="Object already cleaned up, did you assign it"
 
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                          "to another variable?",
 
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                extra=e)
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        obj = factory(self, scope, name)
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        scope[name] = obj
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        return obj
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        """Stop holding on to all the extra stuff"""
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        del self._factory
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        del self._scope
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        del self._name
 
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        # We keep _name, so that we can report errors
 
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        # del self._name
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    def __getattribute__(self, attr):
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        obj = object.__getattribute__(self, '_replace')()