/// This is the function implemented by each concrete class to actually do the calculation.
/// Args will be converted to a consistent UOMSet, unless there are all UOMless, before calling the actual function calc.
/// If the function requires any other specific UOM it must do the conversion itself.
public override CalcQuantity Calculate_Here(IList <CalcQuantity> args, UOMSet uomSet)
{
if (args.Count != 2)
{
return(new BadCalcQuantity(Name + " must have 2 arguments"));
}
if ((args[0].CalcStatus == CalcStatus.Bad) || (args[1].CalcStatus == CalcStatus.Bad))
{
return(new BadCalcQuantity("Bad arguments"));
}
if ((args[0].CalcStatus == CalcStatus.Good) && (args[1].CalcStatus == CalcStatus.Good))
{
if (args[0].Value == args[1].Value) // TODO: Equations: Tolerance?
{
return(new CalcQuantity(0, CalcStatus.Good, "", args[0].AnonUOM));
}
else
{
return(new CalcQuantity((args[0].Value - args[1].Value), CalcStatus.Bad, "Both sides are known but not equal", args[0].AnonUOM)); // Return imbalance
}
}
else if ((args[0].CalcStatus == CalcStatus.Good) && (args[1].CalcStatus == CalcStatus.Uknown))
{
args[1].CalcStatus = args[0].CalcStatus;
args[1].AnonUOM = args[0].AnonUOM;
args[1].Value = args[0].Value;
return(new CalcQuantity(0, CalcStatus.Good, "", args[0].AnonUOM));
}
else if ((args[1].CalcStatus == CalcStatus.Good) && (args[0].CalcStatus == CalcStatus.Uknown))
{
args[0].CalcStatus = args[1].CalcStatus;
args[0].AnonUOM = args[1].AnonUOM;
args[0].Value = args[1].Value;
return(new CalcQuantity(0, CalcStatus.Good, "", args[0].AnonUOM));
}
else if ((args[0].CalcStatus == CalcStatus.Uknown) && (args[1].CalcStatus == CalcStatus.Uknown))
{
return(new CalcQuantity(0, CalcStatus.Uknown, "", args[0].AnonUOM));
}
return(new BadCalcQuantity("Unexpected failure")); // Should never happen
}
/// <summary>
/// Create a new content item from the database row
/// </summary>
public static Constant NewContentItem(string packageName, TblConstant_Row t1, IList <ParamType> paramTypes, IList <UOMSet> uomSets)
{
ParamType paramType = FindInList <ParamType>(paramTypes, (item) => item.Name.Equals(t1.ParamType));
if (paramType == null)
{
return(null);
}
// -------------
UOMSet uomSet = FindInList <UOMSet>(uomSets, (item) => item.Name.Equals(t1.UnitSet));
if (uomSet == null)
{
return(null);
}
AnonUOM anonUOM = new AnonUOM(paramType.Dimensions, uomSet);
// -------------
Constant constant = new Constant(packageName, t1.Name, t1.Description, paramType, t1.Value, anonUOM);
return(constant);
}
} // Safe symbol to use in pure text scenarios
// ---------------------------
/// <summary>
/// Calculate the function as much as possible.
/// For 'NormalFunction' objects we expect that the result is calculated from the args, and we do not change the args.
/// However, this is not enforced at this time.
/// Special sub-types, such as 'FnEquals', behave differently.
///
/// Args will be converted to a consistent UOMSet, unless they are all UOMless, before calling the actual function calc.
/// If the function requires any other specific UOM it must do the conversion itself.
/// </summary>
/// <param name="args"></param>
/// <returns></returns>
public CalcQuantity Calculate(IList <CalcQuantity> args)
{
CalcQuantity result = new CalcQuantity();
try
{
// ------------------- Loop through all the args, checking and converting
UOMSet uomSet = null;
IList <CalcQuantity> convertedArgs = new List <CalcQuantity>();
bool bStarted = false;
for (int i = 0; i < args.Count; i++)
{
CalcQuantity arg = args[i];
// ------------------- Check for a Bad or missing value
if (IsNormalFunction) // Otherwise more flexibility is allowed so we can't demand that all args are known before calculation
{
switch (arg.CalcStatus)
{
case CalcStatus.Uknown:
case CalcStatus.Bad:
result.CalcStatus = arg.CalcStatus; result.Message = "Missing or bad arguments";
return(result);
default:
break;
}
}
// ------------------- Convert the arg to the same UOMSET
CalcQuantity convertedArg = new CalcQuantity(arg);
bool bDimLess = Dimensions.IsDimenionless(convertedArg?.AnonUOM?.Dimensions);
if (!bDimLess)
{
if ((uomSet == null) & (!bStarted || !IsNormalFunction))
{
bStarted = true;
uomSet = convertedArg?.AnonUOM?.UOMSet;
}
else if (IsNormalFunction && (convertedArg?.AnonUOM?.UOMSet != uomSet))
{
if ((uomSet == null) || (convertedArg?.AnonUOM?.UOMSet == null))
{
result.CalcStatus = CalcStatus.Bad; result.Message = "Some arguments have units while others do not"; // They must all have a specified UOMSet, or none of them have
return(result);
}
else
{
// Convert to the uomSet used by other args
AnonUOM argUOM = convertedArg.AnonUOM;
convertedArg.Value = argUOM.UOMSet.Convert(arg.Value, argUOM.Dimensions, uomSet);
convertedArg.AnonUOM = new AnonUOM(argUOM.Dimensions, uomSet);
}
}
}
convertedArgs.Add(convertedArg);
}
// ------------------- Call the concrete implementations to actually do the calcualtion
result = Calculate_Here(convertedArgs, uomSet);
if (!IsNormalFunction) // Then some args might have been changed by the calculation (e.g. assignment in FnEquals)
{
for (int i = 0; i < convertedArgs.Count; i++)
{
convertedArgs[i].CopyMe(args[i]);
}
}
}
catch (Exception)
{
return(new CalcQuantity(0, CalcStatus.Bad, "Unexpected failure", null));
}
return(result);
}
/// This is the function implemented by each concrete class to actually do the calculation. /// Args will be converted to a consistent UOMSet, unless there are all UOMless, before calling the actual function calc. /// If the function requires any other specific UOM it must do the conversion itself. public abstract CalcQuantity Calculate_Here(IList <CalcQuantity> args, UOMSet uomSet);
public AnonUOM(Dimensions dimensions, UOMSet uOMSet) :
base(dimensions)
{
_uOMSet = uOMSet;
}