def get_relation_by_name(cls, relation_name):
"""
Get the class name by file extension.
"""
try:
return rules.RELATIONS.get(relation_name)
except KeyError:
raise exceptions.NotSupportedException("No Relation class found for name %s" % relation_name)
def truncate(self,size=0):
raise exceptions.NotSupportedException()
def dump(self,ConeObject,res,indent=True):
raise exceptions.NotSupportedException()
def dumps(self,ConeObject):
raise exceptions.NotSupportedException()
def load(self,res):
raise exceptions.NotSupportedException()
def loads(self,data):
raise exceptions.NotSupportedException()
def has_ref(self, refs):
"""
Return True if the implementation uses the given ref as input value. Otherwise return False.
"""
raise exceptions.NotSupportedException()