class AliasAnnotations(MutableMapping):
"""Layer draft annotations atop target annotations
"""
def __init__(self, proxy):
self.proxy = proxy
self.draft = self.proxy._DraftProxy__draft
self.target = self.proxy._DraftProxy__target
self.draftAnnotations = IAnnotations(self.draft)
self.targetAnnotations = IAnnotations(self.target)
def __bool__(self):
return self.targetAnnotations.__bool__() or \
self.draftAnnotations.__bool__()
def get(self, key, default=None):
deleted = getattr(self.draft, '_proxyAnnotationsDeleted', set())
if key in deleted:
return default
value = self.draftAnnotations.get(key, _marker)
if value is _marker:
value = self.targetAnnotations.get(key, _marker)
if value is _marker:
return default
return value
def __getitem__(self, key):
value = self.get(key, _marker)
if value is _marker:
raise KeyError(key)
return value
def __iter__(self):
# adhere to MutableMapping interface
for val in self.draftAnnotations.values():
yield val
def __len__(self):
# adhere to MutableMapping interface
return len(self.draftAnnotations)
def keys(self):
deleted = getattr(self.draft, '_proxyAnnotationsDeleted', set())
keys = set(self.draftAnnotations.keys())
keys.update(self.targetAnnotations.keys())
return tuple(keys - deleted)
def __setitem__(self, key, value):
self.draftAnnotations[key] = value
deleted = getattr(self.draft, '_proxyAnnotationsDeleted', set())
if key in deleted:
deleted.remove(key)
self.draft._proxyAnnotationsDeleted = deleted
def setdefault(self, key, default=None):
value = self.get(key, _marker)
if value is _marker:
self[key] = value = default
deleted = getattr(self.draft, '_proxyAnnotationsDeleted', set())
if key in deleted:
deleted.remove(key)
self.draft._proxyAnnotationsDeleted = deleted
return value
def __delitem__(self, key):
self[key] # allow KeyError to be raised if we don't have this key
if key in self.draftAnnotations:
del self.draftAnnotations[key]
deleted = getattr(self.draft, '_proxyAnnotationsDeleted', set())
deleted.add(key)
self.draft._proxyAnnotationsDeleted = deleted
class AliasAnnotations(MutableMapping):
"""Layer draft annotations atop target annotations
"""
def __init__(self, proxy):
self.proxy = proxy
self.draft = self.proxy._DraftProxy__draft
self.target = self.proxy._DraftProxy__target
self.draftAnnotations = IAnnotations(self.draft)
self.targetAnnotations = IAnnotations(self.target)
def __bool__(self):
return self.targetAnnotations.__bool__() or \
self.draftAnnotations.__bool__()
def get(self, key, default=None):
deleted = getattr(self.draft, '_proxyAnnotationsDeleted', set())
if key in deleted:
return default
value = self.draftAnnotations.get(key, _marker)
if value is _marker:
value = self.targetAnnotations.get(key, _marker)
if value is _marker:
return default
return value
def __getitem__(self, key):
value = self.get(key, _marker)
if value is _marker:
raise KeyError(key)
return value
def __iter__(self):
# adhere to MutableMapping interface
for val in self.draftAnnotations.values():
yield val
def __len__(self):
# adhere to MutableMapping interface
return len(self.draftAnnotations)
def keys(self):
deleted = getattr(self.draft, '_proxyAnnotationsDeleted', set())
keys = set(self.draftAnnotations.keys())
keys.update(self.targetAnnotations.keys())
return tuple(keys - deleted)
def __setitem__(self, key, value):
self.draftAnnotations[key] = value
deleted = getattr(self.draft, '_proxyAnnotationsDeleted', set())
if key in deleted:
deleted.remove(key)
self.draft._proxyAnnotationsDeleted = deleted
def setdefault(self, key, default=None):
value = self.get(key, _marker)
if value is _marker:
self[key] = value = default
deleted = getattr(self.draft, '_proxyAnnotationsDeleted', set())
if key in deleted:
deleted.remove(key)
self.draft._proxyAnnotationsDeleted = deleted
return value
def __delitem__(self, key):
self[key] # allow KeyError to be raised if we don't have this key
if key in self.draftAnnotations:
del self.draftAnnotations[key]
deleted = getattr(self.draft, '_proxyAnnotationsDeleted', set())
deleted.add(key)
self.draft._proxyAnnotationsDeleted = deleted
