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from ql.ast.nodes.expressions.binary_operators.binary_operator import BinaryOperatorNode
from ql.types.boolean import QLBoolean
from ql.types.undefined import QLUndefined
class OrOperatorNode(BinaryOperatorNode):
def __init__(self, metadata, expression_type, left_expression, right_expression, value):
super(OrOperatorNode, self).__init__(metadata, expression_type,
left_expression, right_expression, value)
self.__valid_types = {
(QLBoolean, QLBoolean): QLBoolean,
}
def get_result_type(self):
if self.__valid_types.get((self.left_expression.expression_type, self.right_expression.expression_type)):
return self.__valid_types.get((self.left_expression.expression_type, self.right_expression.expression_type))
return QLUndefined
def evaluate(self):
self.value = self.left_expression.value or self.right_expression.value
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