def __init__(self, entity_class, custom_clause_factories=None):
"""
Constructs a SqlFilterSpecificationVisitor
:param entity_class: an entity class that is mapped with SQLAlchemy
:param custom_clause_factories: a map containing custom clause factory
functions for selected (attribute name, operator) combinations.
"""
FilterSpecificationVisitor.__init__(self)
self.__entity_class = entity_class
if custom_clause_factories is None:
custom_clause_factories = {}
self.__custom_clause_factories = custom_clause_factories
def __init__(self, entity_class, custom_clause_factories=None):
"""
Constructs a SqlFilterSpecificationVisitor
:param entity_class: an entity class that is mapped with SQLAlchemy
:param custom_clause_factories: a map containing custom clause factory
functions for selected (attribute name, operator) combinations.
"""
FilterSpecificationVisitor.__init__(self)
self.__entity_class = entity_class
if custom_clause_factories is None:
custom_clause_factories = {}
self.__custom_clause_factories = custom_clause_factories
def visit_nullary(self, spec):
key = (spec.attr_name, spec.operator.name)
if key in self.__custom_clause_factories:
self._push(self.__custom_clause_factories[key](spec.attr_value))
else:
FilterSpecificationVisitor.visit_nullary(self, spec)
def visit_nullary(self, spec):
key = (spec.attr_name, spec.operator.name)
if key in self.__custom_clause_factories:
self._push(self.__custom_clause_factories[key](spec.attr_value))
else:
FilterSpecificationVisitor.visit_nullary(self, spec)
