def startElement(self, name, attrs, connection):
if name == ACTION:
self.validateStartTag(name, RULE)
elif name in LEGAL_ACTIONS:
self.validateStartTag(name, ACTION)
# Verify there is only one action tag in the rule.
if self.action is not None:
raise InvalidLifecycleConfigError(
'Only one action tag is allowed in each rule')
self.action = name
elif name in LEGAL_ACTION_PARAMS:
# Make sure this tag is found in an action tag.
if self.current_tag not in LEGAL_ACTIONS:
raise InvalidLifecycleConfigError(
'Tag %s found outside of action' % name)
# Make sure this tag is allowed for the current action tag.
if name not in LEGAL_ACTION_ACTION_PARAMS[self.action]:
raise InvalidLifecycleConfigError(
'Tag %s not allowed in action %s' % (name, self.action))
elif name == CONDITION:
self.validateStartTag(name, RULE)
elif name in LEGAL_CONDITIONS:
self.validateStartTag(name, CONDITION)
# Verify there is no duplicate conditions.
if name in self.conditions:
raise InvalidLifecycleConfigError(
'Found duplicate conditions %s' % name)
else:
raise InvalidLifecycleConfigError('Unsupported tag ' + name)
self.current_tag = name
def validate(self):
"""Validate the rule."""
if not self.action:
raise InvalidLifecycleConfigError(
'No action was specified in the rule')
if not self.conditions:
raise InvalidLifecycleConfigError(
'No condition was specified for action %s' % self.action)
def startElement(self, name, attrs, connection):
if name == LIFECYCLE_CONFIG:
if self.has_root_tag:
raise InvalidLifecycleConfigError(
'Only one root tag is allowed in the XML')
self.has_root_tag = True
elif name == RULE:
if not self.has_root_tag:
raise InvalidLifecycleConfigError('Invalid root tag ' + name)
rule = Rule()
self.append(rule)
return rule
else:
raise InvalidLifecycleConfigError('Unsupported tag ' + name)
def endElement(self, name, value, connection):
self.validateEndTag(name)
if name == RULE:
# We have to validate the rule after it is fully populated because
# the action and condition elements could be in any order.
self.validate()
elif name == ACTION:
self.current_tag = RULE
elif name in LEGAL_ACTIONS:
if name == SET_STORAGE_CLASS and value is not None:
self.action_text = value.strip()
self.current_tag = ACTION
elif name == CONDITION:
self.current_tag = RULE
elif name in LEGAL_CONDITIONS:
self.current_tag = CONDITION
# Some conditions specify a list of values.
if name in LEGAL_REPEATABLE_CONDITIONS:
if name not in self.conditions:
self.conditions[name] = []
self.conditions[name].append(value.strip())
else:
self.conditions[name] = value.strip()
else:
raise InvalidLifecycleConfigError('Unsupported end tag ' + name)
def startElement(self, name, attrs, connection):
if name == ACTION:
self.validateStartTag(name, RULE)
elif name in LEGAL_ACTIONS:
self.validateStartTag(name, ACTION)
# Verify there is only one action tag in the rule.
if self.action is not None:
raise InvalidLifecycleConfigError(
'Only one action tag is allowed in each rule')
self.action = name
elif name == CONDITION:
self.validateStartTag(name, RULE)
elif name in LEGAL_CONDITIONS:
self.validateStartTag(name, CONDITION)
# Verify there is no duplicate conditions.
if (name in self.conditions
and name not in LEGAL_REPEATABLE_CONDITIONS):
raise InvalidLifecycleConfigError(
'Found duplicate non-repeatable conditions %s' % name)
else:
raise InvalidLifecycleConfigError('Unsupported tag ' + name)
self.current_tag = name
def endElement(self, name, value, connection):
self.validateEndTag(name)
if name == RULE:
# We have to validate the rule after it is fully populated because
# the action and condition elements could be in any order.
self.validate()
elif name == ACTION:
self.current_tag = RULE
elif name in LEGAL_ACTIONS:
self.current_tag = ACTION
elif name in LEGAL_ACTION_PARAMS:
self.current_tag = self.action
# Add the action parameter name and value to the dictionary.
self.action_params[name] = value.strip()
elif name == CONDITION:
self.current_tag = RULE
elif name in LEGAL_CONDITIONS:
self.current_tag = CONDITION
# Add the condition name and value to the dictionary.
self.conditions[name] = value.strip()
else:
raise InvalidLifecycleConfigError('Unsupported end tag ' + name)
def validateEndTag(self, tag):
"""Verify end tag against the start tag."""
if tag != self.current_tag:
raise InvalidLifecycleConfigError(
'Mismatched start and end tags (%s/%s)' %
(self.current_tag, tag))
def validateStartTag(self, tag, parent):
"""Verify parent of the start tag."""
if self.current_tag != parent:
raise InvalidLifecycleConfigError(
'Invalid tag %s found inside %s tag' % (tag, self.current_tag))
def endElement(self, name, value, connection):
if name == LIFECYCLE_CONFIG:
pass
else:
raise InvalidLifecycleConfigError('Unsupported end tag ' + name)