public bool Evaluate(out IJsonValue value, IJSONDocument document)
{
//ArithmeticOperation consideration...
value = null;
object functionResult = null;
if (_executionType.Equals(FunctionExecutionType.Scalar))
{
if (_funcImpl == null)
{
return(false);
}
var values = new List <IJsonValue>();
foreach (var argument in _arguments)
{
IJsonValue result;
if (!argument.Evaluate(out result, document))
{
return(false);
}
values.Add(result);
}
if (_arguments.Count != values.Count)
{
return(false);
}
var arguments = new object[values.Count];
for (int i = 0; i < values.Count; i++)
{
arguments[i] = JsonWrapper.UnWrap(values[i]);
}
try
{
functionResult = _funcImpl.Execute(FunctionName, arguments);
}
catch (System.Reflection.TargetParameterCountException)
{
throw;
}
catch (System.ArgumentException)
{
throw;
}
catch (Exception exception)
{
if (LoggerManager.Instance.QueryLogger != null && LoggerManager.Instance.QueryLogger.IsErrorEnabled)
{
LoggerManager.Instance.QueryLogger.Error("UDFs", exception.Message);
}
throw;
}
value = JsonWrapper.Wrap(functionResult);
return(true);
}
if (_executionType.Equals(FunctionExecutionType.Aggregate))
{
string evaluation = "$" + ToString();
object outValue;
value = JsonWrapper.Wrap(!document.TryGet(evaluation, out outValue) ? 0 : outValue);
return(true);
}
return(false);
}