public object EvaluateFlowInputCondition(Flow fl)
{
string key = string.Format("Flow_{0}_{1}", fl.From.Id, fl.To.Id);
return ExecuteScript(key, delegate()
{
return fl.InputCondition;
});
}
public object EvaluateFlowInputCondition(Flow fl)
{
throw new NotImplementedException();
}
/// <summary>
/// Check flow input condition
/// </summary>
/// <param name="fl"></param>
/// <returns></returns>
private bool EvaluateFlowInputCondition(Flow fl)
{
if (fl.InputCondition == null || fl.InputCondition.Length == 0) return true; //empty condition is true
IProcessScript ctx = CreateProcessScriptContext();
object v = ctx.EvaluateFlowInputCondition(fl);
return Convert.ToBoolean(v);
}
private static int CompareFlowOrder(Flow f1, Flow f2)
{
if (f1.EvalOrder < 0) return 1;
if (f2.EvalOrder < 0) return -1;
if (f1.EvalOrder < f2.EvalOrder)
return -1;
else if (f1.EvalOrder > f2.EvalOrder)
return 1;
else
return 0;
}
internal void AddFlowOut(Flow f)
{
if (f.From != this) throw new Exception("Invalid flow source");
if (f.To == null) throw new Exception("Missing flow target");
Flow tm;
if (_flowsOut.TryGetValue(f.To.Id, out tm))
{
if (tm != f) throw new Exception("Flow already defined to " + f.To.Id);
}
else
{
_flowsOut[f.To.Id] = f;
}
}
/// <summary>
/// Check flow input condition
/// </summary>
/// <param name="fl"></param>
/// <returns></returns>
private bool EvaluateFlowInputCondition(Flow fl)
{
if (fl.InputCondition == null || fl.InputCondition.Length == 0) return true; //empty condition is true
IScriptContext ctx = CreateProcessScriptContext();
string expr = fl.InputCondition.Trim();
if (!expr.EndsWith(";")) expr += ";";
log.Debug("Evaluating flow {0} input condition: {1}", fl.ToString(), expr);
object res = Script.RunCode(expr, ctx);
log.Debug("Result: {0}", res);
return Convert.ToBoolean(res);
}
