elastic_grammar_query.py 文件源码

def _build_logical_expression(self, grammar, terminal_component_names):
        terminal_component_symbols = eval("symbols('%s')"%(' '.join(terminal_component_names)))
        if isinstance(terminal_component_symbols, Symbol):
            terminal_component_symbols = [terminal_component_symbols]
        name_to_symbol = {terminal_component_names[i]:symbol for i, symbol in enumerate(terminal_component_symbols)}
        terminal_component_names = set(terminal_component_names)

        op_to_symbolic_operation = {'not':operator.invert, 'concat':operator.and_, 'gap':operator.and_, 'union':operator.or_, 'intersect':operator.and_}

        def logical_expression_builder(component):
            if component['id'] in terminal_component_names:
                return name_to_symbol[component['id']]
            else:
                children = component['components']
                return reduce(op_to_symbolic_operation[component['operation']],[logical_expression_builder(child) for child in children])

        return simplify(logical_expression_builder(grammar))