public async Task<object> ExecuteAsync(object[] parameters, IExecutionContext executionContext, CancellationToken cancellationToken)
{
if (parameters == null) throw new ArgumentNullException(nameof(parameters));
cancellationToken.ThrowIfCancellationRequested();
//Make sure that the # of parameters match.
if (parameters.Length != Arguments.Count)
{
throw new ArgumentMismatchException($"The function '{Name}' contains {Arguments.Count} arguments but {parameters.Length} were specified.");
}
int argumentIndex = 0;
//Copy the parameter values to the variable values
foreach (var argument in Arguments)
{
//Look for the variable with the same id.
var variable = Variables.FirstOrDefault(v => v.Id == argument.Id);
//Check to make sure we found it.
if (variable == null)
{
throw new ArgumentException($"Argument variable missing for argument '{argument.Name}' in function '{Name}'.");
}
//Copy the value
variable.Value = parameters[argumentIndex];
argumentIndex++;
}
//Clear all of the errors
Elements.ForAll(e =>
{
var errorSource = e as IErrorSource;
errorSource?.ClearErrors();
});
//Create the executor.
var executor = new StatementExecutor();
//Execute the function.
await executor.ExecuteAsync(executionContext, Elements, cancellationToken);
//Find the return variable
var returnVariable = Variables.FirstOrDefault(v => v.Id == ReturnValueVariable.ReturnVariableId);
//return the returnVariable value (or null)
return returnVariable?.Value;
}
public async Task ExecuteAsync(IExecutionContext executionContext, CancellationToken token)
{
var executor = new StatementExecutor();
await executor.ExecuteAsync(executionContext, Elements, token);
}
