public object Execute(VariableContext context = null)
{
var funcName = _function.Execute(context);
if (funcName is Variable outFuncVar && outFuncVar.ValueType == DataTypeEnum.Function)
{
if (_parameters is PositionalParameters)
{
var lVars = RetrieveListOfParameters(context);
return(outFuncVar.UserFunction.Execute(lVars, context));
}
if (_parameters is NamedParameters nParams)
{
return(outFuncVar.UserFunction.Execute(null, context, nParams));
}
}
if (funcName is Variable outFuncName && outFuncName.ValueType == DataTypeEnum.String)
{
List <Variable> lVars = new List <Variable> ();
if (_parameters is PositionalParameters)
{
lVars = RetrieveListOfParameters(context);
if (VariableContextHelper.RetrieveBkm(outFuncName, context, out var bkmMeta))
{
return(DMNDoerHelper.EvalBkm(bkmMeta.BKMModel, context, lVars));
}
if (context.DecisionServiceMetaByName.TryGetValue(outFuncName, out var decisionService))
{
return(DMNDoerHelper.EvalDecisionService(decisionService, context, lVars));
}
}
if (_parameters is NamedParameters namedParam)
{
if (VariableContextHelper.RetrieveBkm(outFuncName, context, out var bkmMeta))
{
lVars = BKMConvertNamedParameter(namedParam, bkmMeta.BKMModel, context);
return(DMNDoerHelper.EvalBkm(bkmMeta.BKMModel, context, lVars));
}
if (context.DecisionServiceMetaByName.TryGetValue(outFuncName, out var decisionService))
{
lVars = DecisionServiceConvertNamedParameter(namedParam, decisionService, context);
return(DMNDoerHelper.EvalDecisionService(decisionService, context, lVars));
}
}
var funcMeta = BuiltInFactory.GetFunc(outFuncName);
if (_parameters is NamedParameters nParam)
{
lVars = BuiltInFactory.ConvertNamedParameter(nParam, funcMeta.Item2, context);
}
return(funcMeta.Item1.Execute(lVars));
}
throw new FEELException("Function name is not a variable of string type");
}
