MatchQueryValidator.java 文件源码

private void validateReturnClause() {
    for (String variable : structuredQuery.getReturnVariables()) {
        checkVariableIsDefined(variable, UNDEFINED_VARIABLE_IN_RETURN_CLAUSE_ERROR_MESSAGE);
    }
    for (Pair<String, String> variablePropertyPair :
        structuredQuery.getReturnVariablePropertyPairs()) {
        checkVariableIsDefinedAndPropertyExists(variablePropertyPair);
    }
    for (QueryAggregation queryAggregation : structuredQuery.getQueryAggregations()) {
        if (null != queryAggregation.getVariable()) {
            checkVariableIsDefined(queryAggregation.getVariable(),
                UNDEFINED_VARIABLE_IN_RETURN_CLAUSE_ERROR_MESSAGE);
        } else if (null != queryAggregation.getVariablePropertyPair()) {
            checkVariableIsDefinedAndPropertyExists(queryAggregation.getVariablePropertyPair());
        }
    }
}