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55 lines
1.8 KiB
Python
55 lines
1.8 KiB
Python
# coding: utf8
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from __future__ import unicode_literals
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import functools
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class Underscore(object):
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doc_extensions = {}
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span_extensions = {}
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token_extensions = {}
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def __init__(self, extensions, obj, start=None, end=None):
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object.__setattr__(self, '_extensions', extensions)
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object.__setattr__(self, '_obj', obj)
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# Assumption is that for doc values, _start and _end will both be None
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# Span will set non-None values for _start and _end
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# Token will have _start be non-None, _end be None
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# This lets us key everything into the doc.user_data dictionary,
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# (see _get_key), and lets us use a single Underscore class.
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object.__setattr__(self, '_doc', obj.doc)
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object.__setattr__(self, '_start', start)
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object.__setattr__(self, '_end', end)
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def __getattr__(self, name):
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if name not in self._extensions:
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raise AttributeError(name)
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default, method, getter, setter = self._extensions[name]
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if getter is not None:
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return getter(self._obj)
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elif method is not None:
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return functools.partial(method, self._obj)
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else:
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return self._doc.user_data.get(self._get_key(name), default)
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def __setattr__(self, name, value):
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if name not in self._extensions:
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raise AttributeError(name)
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default, method, getter, setter = self._extensions[name]
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if setter is not None:
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return setter(self._obj, value)
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else:
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self._doc.user_data[self._get_key(name)] = value
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def set(self, name, value):
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return self.__setattr__(name, value)
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def get(self, name):
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return self.__getattr__(name)
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def has(self, name):
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return name in self._extensions
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def _get_key(self, name):
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return ('._.', name, self._start, self._end)
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