/// <summary>
/// Executes the decision. The execution wrapper around <see cref="Evaluate"/>.
/// </summary>
/// <param name="context">DMN Engine execution context</param>
/// <param name="executionId">Identified of the execution run</param>
/// <returns>Decision result</returns>
/// <exception cref="ArgumentNullException"><paramref name="context"/> is null</exception>
public DmnDecisionResult Execute(DmnExecutionContext context, string executionId = null)
{
if (context == null)
{
throw Logger.Fatal <ArgumentNullException>($"{nameof(context)} is null");
}
Logger.InfoCorr(executionId, $"Executing decision {Name}...");
if (Logger.IsTraceEnabled)
{
foreach (var input in RequiredInputs)
{
Logger.TraceCorr(executionId, $"Decision {Name}, input {input.Name}, value {context.GetVariable(input).Value}");
}
}
// ReSharper disable once InvertIf
if (RequiredDecisions != null)
{
Logger.InfoCorr(executionId, $"Resolving dependencies for decision {Name}...");
foreach (var requiredDecision in RequiredDecisions)
{
Logger.InfoCorr(executionId, $"Executing dependency {requiredDecision.Name} for decision {Name}...");
requiredDecision.Execute(context, executionId);
Logger.InfoCorr(executionId, $"Executed dependency {requiredDecision.Name} for decision {Name}");
}
Logger.InfoCorr(executionId, $"Resolved dependencies for decision {Name}");
}
var result = Evaluate(context, executionId);
context.CreateSnapshot(this, result);
Logger.InfoCorr(executionId, $"Executed decision {Name}");
// ReSharper disable once InvertIf
if (Logger.IsTraceEnabled)
{
if (!result.HasResult)
{
Logger.TraceCorr(executionId, $"Decision {Name} returned no result");
}
else
{
if (result.IsSingleResult)
{
foreach (var output in result.FirstResultVariables)
{
Logger.TraceCorr(executionId, $"Decision {Name} single result, output {output.Name}, value {output.Value}");
}
}
else
{
var idx = 0;
foreach (var singleResult in result.Results)
{
idx++;
foreach (var output in singleResult.Variables)
{
Logger.TraceCorr(executionId, $"Decision {Name} result #{idx}, output {output.Name}, value {output.Value}");
}
}
}
}
}
return(result);
}
