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authorChris McDonough <chrism@plope.com>2010-10-25 10:29:31 -0400
committerChris McDonough <chrism@plope.com>2010-10-25 10:29:31 -0400
commit64372401084889a440c9d990a0febc221e3e4b5c (patch)
treec8939a341505d19f19fa6918d264b4e1d95326f8 /repoze/bfg/location.py
parentc8e78c2037806f3e5dab57de635bf80865b7061d (diff)
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first pass at converting bfg to pyramid namespace
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diff --git a/repoze/bfg/location.py b/repoze/bfg/location.py
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-##############################################################################
-#
-# Copyright (c) 2003 Zope Corporation and Contributors.
-# All Rights Reserved.
-#
-# This software is subject to the provisions of the Zope Public License,
-# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
-# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
-# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
-# FOR A PARTICULAR PURPOSE.
-#
-##############################################################################
-
-def inside(model1, model2):
- """Is ``model1`` 'inside' ``model2``? Return ``True`` if so, else
- ``False``.
-
- ``model1`` is 'inside' ``model2`` if ``model2`` is a
- :term:`lineage` ancestor of ``model1``. It is a lineage ancestor
- if its parent (or one of its parent's parents, etc.) is an
- ancestor.
- """
- while model1 is not None:
- if model1 is model2:
- return True
- model1 = model1.__parent__
-
- return False
-
-def lineage(model):
- """
- Return a generator representing the :term:`lineage` of the
- :term:`model` object implied by the ``model`` argument. The
- generator first returns ``model`` unconditionally. Then, if
- ``model`` supplies a ``__parent__`` attribute, return the object
- represented by ``model.__parent__``. If *that* object has a
- ``__parent__`` attribute, return that object's parent, and so on,
- until the object being inspected either has no ``__parent__``
- attribute or which has a ``__parent__`` attribute of ``None``.
- For example, if the object tree is::
-
- thing1 = Thing()
- thing2 = Thing()
- thing2.__parent__ = thing1
-
- Calling ``lineage(thing2)`` will return a generator. When we turn
- it into a list, we will get::
-
- list(lineage(thing2))
- [ <Thing object at thing2>, <Thing object at thing1> ]
- """
- while model is not None:
- yield model
- # The common case is that the AttributeError exception below
- # is exceptional as long as the developer is a "good citizen"
- # who has a root object with a __parent__ of None. Using an
- # exception here instead of a getattr with a default is an
- # important micro-optimization, because this function is
- # called in any non-trivial application over and over again to
- # generate URLs and paths.
- try:
- model = model.__parent__
- except AttributeError:
- model = None
-