class ItemHandler(ValueHandler):
"""
A SAX ContentHandler implementation responsible for loading items.
"""
def __init__(self, repository, parent, afterLoadHooks, new):
super(ItemHandler, self).__init__(repository)
self.loading = repository.isLoading()
self.parent = parent
self.afterLoadHooks = afterLoadHooks
self.item = None
self.new = new
self.values = None
self.references = None
def refStart(self, itemHandler, attrs):
if self.tags[-1] == 'item':
name = attrs['name']
attribute = self.getAttribute(name)
self.attributes.append(attribute)
flags = attrs.get('flags', None)
if flags is not None:
flags = int(flags)
self.references._setFlags(name, flags)
readOnly = flags & Values.READONLY
else:
readOnly = False
cardinality = self.getCardinality(attribute, attrs)
if cardinality != 'single':
if cardinality == 'dict':
self.repository.logger.warning("Warning, 'dict' cardinality for reference attribute %s on %s is deprecated, use 'list' instead", name, self.name or self.uuid)
self._setupRefList(name, attribute, readOnly, attrs)
def _setupRefList(self, name, attribute, readOnly, attrs):
refList = None
otherName = self.getOtherName(name, attribute, attrs)
if 'uuid' in attrs:
uuid = UUID(attrs['uuid'])
else:
uuid = None
if self.update and attrs.get('operation') == 'append':
refList = self.item._references.get(name)
if refList is None:
refList = self.repository._createRefList(None, name, otherName,
True, readOnly, self.new,
uuid)
self.collections.append(refList)
def itemStart(self, itemHandler, attrs):
super(ItemHandler, self).itemStart(itemHandler, attrs)
if self.values is None:
self.values = Values(None)
if self.references is None:
self.references = References(None)
self.refs = []
self.name = None
self.cls = None
self.parentRef = None
self.isContainer = False
self.uuid = UUID(attrs.get('uuid'))
self.version = int(attrs.get('version', '0'))
self.update = update = attrs.get('update')
self.delete = delete = attrs.get('delete')
def _find(spec):
typeAttr = attrs.get('type', 'path')
if typeAttr == 'path':
item = self.parent.find(Path(spec))
elif typeAttr == 'uuid':
item = self.parent.find(UUID(spec))
else:
raise TypeError, typeAttr
if item is None:
raise NoSuchItemError, (spec, self.version)
return item
if update is not None:
item = _find(update)
elif delete is not None:
item = _find(delete)
else:
item = None
if item is not None:
self.item = item
self.cls = type(item)
self.version = item._version
self.name = item.itsName
self.kind = item.itsKind
self.uuid = item.itsUUID
self.parent = item.itsParent
def itemEnd(self, itemHandler, attrs):
from repository.item.Item import Item
if self.withSchema:
status = Item.CORESCHEMA
else:
status = 0
cls = self.cls
if cls is None:
if self.kind is None:
cls = Item
else:
cls = self.kind.getItemClass()
instance = self.repository._reuseItemInstance(self.uuid)
if instance is not None:
if cls is not type(instance):
raise TypeError, 'Class for item has changed from %s to %s' %(type(instance), cls)
item = self.item = instance
status |= item._status & item.PINNED
instance = None
elif self.update or self.delete:
item = self.item
values = item._values
references = item._references
for name, value in self.values.iteritems():
values[name] = value
item.setDirty(Item.VDIRTY, name, values, noMonitors=True)
self.values = values
for name, value in self.references.iteritems():
if not isinstance(value, dict):
dirty = Item.VDIRTY
item.setAttributeValue(name, value, references,
None, False)
else:
dirty = Item.RDIRTY
references[name] = value
item.setDirty(dirty, name, references, noMonitors=True)
self.references = references
status = item._status | Item.NDIRTY
else:
item = self.item = cls.__new__(cls)
item._fillItem(self.name, self.parent, self.kind, uuid = self.uuid,
values = self.values, references = self.references,
afterLoadHooks = self.afterLoadHooks,
version = self.version, status = status,
update = self.update)
if self.isContainer and item._children is None:
item._children = self.repository._createChildren(item, self.new)
if not (self.update or self.delete):
self.repository._registerItem(item)
self.values._setItem(item)
self.references._setItem(item)
for attribute, value in self.values.iteritems():
if isinstance(value, ItemValue):
value._setOwner(item, attribute)
for refArgs in self.refs:
other = refArgs._setItem(item)
if self.loading:
refArgs._setRef()
elif other is None:
self.afterLoadHooks.append(refArgs._setValue)
else:
refArgs._setValue(self.repository)
self.afterLoadHooks.append(self.setupClass)
if hasattr(cls, 'onItemLoad'):
self.afterLoadHooks.append(item.onItemLoad)
if self.delete:
self.afterLoadHooks.append(item.delete)
def setupClass(self, view):
if self.update and isinstance(self.item, Kind):
self.item.flushCaches('attributes', True)
elif self.kind is not None:
self.kind._setupClass(type(self.item))
def kindEnd(self, itemHandler, attrs):
assert not self.item
super(ItemHandler, self).kindEnd(itemHandler, attrs)
if self.kind is None:
if self.withSchema:
self.afterLoadHooks.append(self._setKind)
else:
raise ValueError, "While loading %s, kind %s not found" %(self.name or self.uuid, self.kindRef)
def _setKind(self, view):
if self.item._kind is None:
self.kind = view.find(self.kindRef)
if self.kind is None:
raise ValueError, 'Kind %s not found' %(self.kindRef)
else:
self.item._kind = self.kind
def parentEnd(self, itemHandler, attrs):
if attrs['type'] == 'uuid':
self.parentRef = UUID(self.data)
else:
self.parentRef = Path(self.data)
self.isContainer = attrs.get('container', 'False') == 'True'
self.parent = self.repository.find(self.parentRef)
if self.parent is None:
self.afterLoadHooks.append(self._move)
def _move(self, view):
if self.item._parent is None:
self.parent = view.find(self.parentRef)
if self.parent is None:
raise ValueError, 'Parent %s not found' %(self.parentRef)
else:
self.item.move(self.parent)
def classEnd(self, itemHandler, attrs):
self.cls = ClassLoader.loadClass(self.data, attrs['module'])
def nameEnd(self, itemHandler, attrs):
self.name = self.data
def refEnd(self, itemHandler, attrs):
if self.tags[-1] == 'item':
attribute = self.attributes.pop()
cardinality = self.getCardinality(attribute, attrs)
otherCard = attrs.get('otherCard', None)
else:
cardinality = 'single'
otherCard = self.tagAttrs[-1].get('otherCard', None)
if cardinality == 'single': # cardinality of tag
typeName = attrs.get('type', 'path')
if typeName == 'path':
ref = Path(self.data)
elif typeName == 'none':
self.references[attrs['name']] = None
return
else:
ref = UUID(self.data)
if self.collections:
refList = self.collections[-1]
self.refs.append(RefArgs(refList._name, None,
refList._otherName, ref,
otherCard=otherCard,
otherAlias=attrs.get('otherAlias'),
previous=self.refName(attrs, 'previous'),
next=self.refName(attrs, 'next'),
alias=attrs.get('alias')))
else:
name = attrs['name']
otherName = self.getOtherName(name, self.getAttribute(name),
attrs)
self.refs.append(RefArgs(name, None, otherName, ref,
otherCard=otherCard,
otherAlias=attrs.get('otherAlias')))
else:
value = self.collections.pop()
self.references[attrs['name']] = value
if value._indexes:
self.afterLoadHooks.append(value._restoreIndexes)
def indexEnd(self, itemHandler, attrs):
if not self.collections:
raise ValueError, self.tagAttrs[-1]['name']
refList = self.collections[-1]
kwds = attrs.copy()
del kwds['type']
del kwds['name']
refList.addIndex(attrs['name'], attrs['type'], **kwds)
def refName(self, attrs, attr):
try:
return self.makeValue(attrs.get(attr + 'Type', 'str'), attrs[attr])
except KeyError:
return None
def getOtherName(self, name, attribute, attrs):
otherName = attrs.get('otherName')
if otherName is None and attribute is not None:
otherName = self.kind.getOtherName(name, None, None, None)
if otherName is None:
raise TypeError, 'Undefined other endpoint for %s.%s of kind %s' %(self.name or self.uuid, name, self.kind.itsPath)
return otherName
class ItemHandler(ValueHandler):
"""
A SAX ContentHandler implementation responsible for loading items.
"""
def __init__(self, repository, parent, afterLoadHooks, new):
super(ItemHandler, self).__init__(repository)
self.loading = repository.isLoading()
self.parent = parent
self.afterLoadHooks = afterLoadHooks
self.item = None
self.new = new
self.values = None
self.references = None
def refStart(self, itemHandler, attrs):
if self.tags[-1] == 'item':
name = attrs['name']
attribute = self.getAttribute(name)
self.attributes.append(attribute)
flags = attrs.get('flags', None)
if flags is not None:
flags = int(flags)
self.references._setFlags(name, flags)
readOnly = flags & Values.READONLY
else:
readOnly = False
cardinality = self.getCardinality(attribute, attrs)
if cardinality != 'single':
if cardinality == 'dict':
self.repository.logger.warning(
"Warning, 'dict' cardinality for reference attribute %s on %s is deprecated, use 'list' instead",
name, self.name or self.uuid)
self._setupRefList(name, attribute, readOnly, attrs)
def _setupRefList(self, name, attribute, readOnly, attrs):
refList = None
otherName = self.getOtherName(name, attribute, attrs)
if 'uuid' in attrs:
uuid = UUID(attrs['uuid'])
else:
uuid = None
if self.update and attrs.get('operation') == 'append':
refList = self.item._references.get(name)
if refList is None:
refList = self.repository._createRefList(None, name, otherName,
True, readOnly, self.new,
uuid)
self.collections.append(refList)
def itemStart(self, itemHandler, attrs):
super(ItemHandler, self).itemStart(itemHandler, attrs)
if self.values is None:
self.values = Values(None)
if self.references is None:
self.references = References(None)
self.refs = []
self.name = None
self.cls = None
self.parentRef = None
self.isContainer = False
self.uuid = UUID(attrs.get('uuid'))
self.version = int(attrs.get('version', '0'))
self.update = update = attrs.get('update')
self.delete = delete = attrs.get('delete')
def _find(spec):
typeAttr = attrs.get('type', 'path')
if typeAttr == 'path':
item = self.parent.find(Path(spec))
elif typeAttr == 'uuid':
item = self.parent.find(UUID(spec))
else:
raise TypeError, typeAttr
if item is None:
raise NoSuchItemError, (spec, self.version)
return item
if update is not None:
item = _find(update)
elif delete is not None:
item = _find(delete)
else:
item = None
if item is not None:
self.item = item
self.cls = type(item)
self.version = item._version
self.name = item.itsName
self.kind = item.itsKind
self.uuid = item.itsUUID
self.parent = item.itsParent
def itemEnd(self, itemHandler, attrs):
from repository.item.Item import Item
if self.withSchema:
status = Item.CORESCHEMA
else:
status = 0
cls = self.cls
if cls is None:
if self.kind is None:
cls = Item
else:
cls = self.kind.getItemClass()
instance = self.repository._reuseItemInstance(self.uuid)
if instance is not None:
if cls is not type(instance):
raise TypeError, 'Class for item has changed from %s to %s' % (
type(instance), cls)
item = self.item = instance
status |= item._status & item.PINNED
instance = None
elif self.update or self.delete:
item = self.item
values = item._values
references = item._references
for name, value in self.values.iteritems():
values[name] = value
item.setDirty(Item.VDIRTY, name, values, noMonitors=True)
self.values = values
for name, value in self.references.iteritems():
if not isinstance(value, dict):
dirty = Item.VDIRTY
item.setAttributeValue(name, value, references, None,
False)
else:
dirty = Item.RDIRTY
references[name] = value
item.setDirty(dirty, name, references, noMonitors=True)
self.references = references
status = item._status | Item.NDIRTY
else:
item = self.item = cls.__new__(cls)
item._fillItem(self.name,
self.parent,
self.kind,
uuid=self.uuid,
values=self.values,
references=self.references,
afterLoadHooks=self.afterLoadHooks,
version=self.version,
status=status,
update=self.update)
if self.isContainer and item._children is None:
item._children = self.repository._createChildren(item, self.new)
if not (self.update or self.delete):
self.repository._registerItem(item)
self.values._setItem(item)
self.references._setItem(item)
for attribute, value in self.values.iteritems():
if isinstance(value, ItemValue):
value._setOwner(item, attribute)
for refArgs in self.refs:
other = refArgs._setItem(item)
if self.loading:
refArgs._setRef()
elif other is None:
self.afterLoadHooks.append(refArgs._setValue)
else:
refArgs._setValue(self.repository)
self.afterLoadHooks.append(self.setupClass)
if hasattr(cls, 'onItemLoad'):
self.afterLoadHooks.append(item.onItemLoad)
if self.delete:
self.afterLoadHooks.append(item.delete)
def setupClass(self, view):
if self.update and isinstance(self.item, Kind):
self.item.flushCaches('attributes', True)
elif self.kind is not None:
self.kind._setupClass(type(self.item))
def kindEnd(self, itemHandler, attrs):
assert not self.item
super(ItemHandler, self).kindEnd(itemHandler, attrs)
if self.kind is None:
if self.withSchema:
self.afterLoadHooks.append(self._setKind)
else:
raise ValueError, "While loading %s, kind %s not found" % (
self.name or self.uuid, self.kindRef)
def _setKind(self, view):
if self.item._kind is None:
self.kind = view.find(self.kindRef)
if self.kind is None:
raise ValueError, 'Kind %s not found' % (self.kindRef)
else:
self.item._kind = self.kind
def parentEnd(self, itemHandler, attrs):
if attrs['type'] == 'uuid':
self.parentRef = UUID(self.data)
else:
self.parentRef = Path(self.data)
self.isContainer = attrs.get('container', 'False') == 'True'
self.parent = self.repository.find(self.parentRef)
if self.parent is None:
self.afterLoadHooks.append(self._move)
def _move(self, view):
if self.item._parent is None:
self.parent = view.find(self.parentRef)
if self.parent is None:
raise ValueError, 'Parent %s not found' % (self.parentRef)
else:
self.item.move(self.parent)
def classEnd(self, itemHandler, attrs):
self.cls = ClassLoader.loadClass(self.data, attrs['module'])
def nameEnd(self, itemHandler, attrs):
self.name = self.data
def refEnd(self, itemHandler, attrs):
if self.tags[-1] == 'item':
attribute = self.attributes.pop()
cardinality = self.getCardinality(attribute, attrs)
otherCard = attrs.get('otherCard', None)
else:
cardinality = 'single'
otherCard = self.tagAttrs[-1].get('otherCard', None)
if cardinality == 'single': # cardinality of tag
typeName = attrs.get('type', 'path')
if typeName == 'path':
ref = Path(self.data)
elif typeName == 'none':
self.references[attrs['name']] = None
return
else:
ref = UUID(self.data)
if self.collections:
refList = self.collections[-1]
self.refs.append(
RefArgs(refList._name,
None,
refList._otherName,
ref,
otherCard=otherCard,
otherAlias=attrs.get('otherAlias'),
previous=self.refName(attrs, 'previous'),
next=self.refName(attrs, 'next'),
alias=attrs.get('alias')))
else:
name = attrs['name']
otherName = self.getOtherName(name, self.getAttribute(name),
attrs)
self.refs.append(
RefArgs(name,
None,
otherName,
ref,
otherCard=otherCard,
otherAlias=attrs.get('otherAlias')))
else:
value = self.collections.pop()
self.references[attrs['name']] = value
if value._indexes:
self.afterLoadHooks.append(value._restoreIndexes)
def indexEnd(self, itemHandler, attrs):
if not self.collections:
raise ValueError, self.tagAttrs[-1]['name']
refList = self.collections[-1]
kwds = attrs.copy()
del kwds['type']
del kwds['name']
refList.addIndex(attrs['name'], attrs['type'], **kwds)
def refName(self, attrs, attr):
try:
return self.makeValue(attrs.get(attr + 'Type', 'str'), attrs[attr])
except KeyError:
return None
def getOtherName(self, name, attribute, attrs):
otherName = attrs.get('otherName')
if otherName is None and attribute is not None:
otherName = self.kind.getOtherName(name, None, None, None)
if otherName is None:
raise TypeError, 'Undefined other endpoint for %s.%s of kind %s' % (
self.name or self.uuid, name, self.kind.itsPath)
return otherName
