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Viewing changes to src/schooltool/rest/common.py

  • Committer: Justas Sadzevicius
  • Date: 2013-07-17 13:19:49 UTC
  • Revision ID: justas@pov.lt-20130717131949-dr7gc640jt194lw2
Initial egg with larz.restful hooked up and a simple person schema.

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src/schooltool/rest/common.py
 
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from zope.interface import implements, providedBy
 
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from zope.publisher.interfaces import IPublishTraverse
 
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from zope.publisher.interfaces import NotFound
 
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from zope.security.checker import ProxyFactory
 
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from zope.location.location import locate
 
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from schooltool.rest.interfaces import ICommonEntry
 
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from schooltool.rest.interfaces import ST_CONTEXT_IFC, ST_CONTEXT_ATTR
 
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class TraverseViaGet(object):
 
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    implements(IPublishTraverse)
 
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    def publishTraverse(self, request, name):
 
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        marker = object()
 
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        value = self.get(name, marker)
 
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        if (value is marker or
 
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            value is None):
 
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            raise NotFound(self, name, request)
 
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        return value
 
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class Entry(object):
 
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    implements(ICommonEntry)
 
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    __name__ = None
 
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    __parent__ = None
 
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    context = None
 
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    def __init__(self, obj, parent=None):
 
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        self.context = obj
 
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        if parent is not None:
 
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            locate(self, parent)
 
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        self.__name__ = getattr(obj, '__name__', None)
 
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    def __getattr__(self, name):
 
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        for ifc in providedBy(self):
 
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            if name not in ifc:
 
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                continue
 
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            adapter = ifc[name].queryTaggedValue(ST_CONTEXT_IFC)
 
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            if adapter is None:
 
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                continue
 
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            attr = ifc[name].queryTaggedValue(ST_CONTEXT_ATTR)
 
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            if attr is None:
 
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                continue
 
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            context = object.__getattribute__(self, attr)
 
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            target = adapter(ProxyFactory(context))
 
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            return getattr(target, name)
 
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        raise AttributeError(self, name)
 
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    def __setattr__(self, name, value):
 
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        for ifc in providedBy(self):
 
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            if name not in ifc:
 
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                continue
 
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            adapter = ifc[name].queryTaggedValue(ST_CONTEXT_IFC)
 
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            if adapter is None:
 
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                continue
 
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            attr = ifc[name].queryTaggedValue(ST_CONTEXT_ATTR)
 
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            if attr is None:
 
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                continue
 
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            context = object.__getattribute__(self, attr)
 
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            target = adapter(ProxyFactory(context))
 
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            setattr(target, name, value)
 
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            return
 
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        object.__setattr__(self, name, value)