// The data that the rule will run against.
//object data = new { MyNumber = 8 };
var inputData = new Dictionary<string, object> { { "RRLFLD0128", "" } };
// Rule definition retrieved as JSON text
string jsonText = "{\"and\":[{\"<=\":[{\"var\":\"RRLFLD0128\"},25]}]}";
// Parse json into hierarchical structure
var rule = JObject.Parse(jsonText);
// Create an evaluator with default operators.
var evaluator = new JsonLogicEvaluator(EvaluateOperators.Default);
// Apply the rule to the data.
object result = evaluator.Apply(rule, inputData);
}`
The inputData passed to the evaluator.Apply(rule, inputData) causes an exception because we are trying to compare a integer number to an empty string so the parser is unable to map the empty string to a valid number.
For this I modified the method GenericArgsSatisfy in the EvaluateOperator class:
Previously the return method was:
return isAllText ? CheckCriteria(values.Cast<string>().ToArray(), criteriaText) : CheckCriteria(values.Select(a => a == null ? 0d : Double.Parse(a.ToString())).ToArray(), criteriaDouble);
After Modification:
return isAllText ? CheckCriteria(values.Cast<string>().ToArray(), criteriaText) : CheckCriteria(values.Select(a => a == null || (a is string && string.IsNullOrEmpty(a.ToString())) ? 0d : Double.Parse(a.ToString())).ToArray(), criteriaDouble);
Now the function can parse the empty string to null instead of throwing and exception and the apply method produces the desired results.
`static void Main(string[] args) {
The inputData passed to the evaluator.Apply(rule, inputData) causes an exception because we are trying to compare a integer number to an empty string so the parser is unable to map the empty string to a valid number. For this I modified the method GenericArgsSatisfy in the EvaluateOperator class: Previously the return method was:
return isAllText ? CheckCriteria(values.Cast<string>().ToArray(), criteriaText) : CheckCriteria(values.Select(a => a == null ? 0d : Double.Parse(a.ToString())).ToArray(), criteriaDouble);After Modification:return isAllText ? CheckCriteria(values.Cast<string>().ToArray(), criteriaText) : CheckCriteria(values.Select(a => a == null || (a is string && string.IsNullOrEmpty(a.ToString())) ? 0d : Double.Parse(a.ToString())).ToArray(), criteriaDouble);Now the function can parse the empty string to null instead of throwing and exception and the apply method produces the desired results.