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from multimethods import multimethod
from ql.ast.nodes.expressions.binary_operators.binary_operator import BinaryOperatorNode
from ql.ast.nodes.expressions.literals.literal import LiteralNode
from ql.ast.nodes.expressions.unary_operators.unary_operator import UnaryOperatorNode
from ql.ast.nodes.expressions.variable import VariableNode
from ql.ast.nodes.statements.form_statement import FormNode
from ql.ast.nodes.statements.if_statement import IfNode
from ql.ast.nodes.statements.question_statement import QuestionNode
class DependencyVisitor:
def __init__(self):
self.__all_dependencies = []
self.__current_dependencies = []
@property
def identifier_dependencies(self):
return self.__all_dependencies
@multimethod(FormNode)
def visit(self, node):
for child in node.block:
child.accept(self)
@multimethod(IfNode)
def visit(self, node):
node.condition.accept(self)
for child in node.block:
child.accept(self)
@multimethod(QuestionNode)
def visit(self, node):
if node.computed:
self.__current_dependencies = []
node.answer.accept(self)
self.__all_dependencies.append((node.identifier, self.__current_dependencies, node.metadata))
@multimethod(BinaryOperatorNode)
def visit(self, node):
node.left_expression.accept(self)
node.right_expression.accept(self)
@multimethod(UnaryOperatorNode)
def visit(self, node):
node.expression.accept(self)
@multimethod(VariableNode)
def visit(self, node):
self.__current_dependencies.append(node.identifier)
@multimethod(LiteralNode)
def visit(self, node):
pass
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