/// <summary>
/// Provides the graph of this function if it has been statically defined
/// </summary>
/// <param name="context">the context used to create the graph</param>
/// <param name="parameter"></param>
/// <param name="explain"></param>
/// <returns></returns>
public override Graph CreateGraph(InterpretationContext context, Parameter parameter, ExplanationPart explain)
{
Graph retVal = null;
Graph graph = createGraphForValue(context, context.FindOnStack(Function).Value, explain, parameter);
if (graph != null)
{
double speed = GetDoubleValue(context.FindOnStack(Speed).Value);
double solutionX = graph.SolutionX(speed);
if (solutionX == double.MaxValue)
{
// No value found, return Unknown
Range distanceType = (Range)EFSSystem.FindByFullName("Default.BaseTypes.Distance");
EnumValue unknownDistance = distanceType.findEnumValue("Unknown");
retVal = Graph.createGraph(distanceType.getValueAsDouble(unknownDistance));
}
else
{
// Create the graph for this solution
retVal = Graph.createGraph(solutionX);
}
}
else
{
Function.AddError("Cannot create graph for " + Function);
}
return(retVal);
}
/// <summary>
/// Provides the value of the function
/// </summary>
/// <param name="context"></param>
/// <param name="actuals">the actual parameters values</param>
/// <param name="explain"></param>
/// <returns>The value for the function application</returns>
public override IValue Evaluate(InterpretationContext context, Dictionary <Actual, IValue> actuals,
ExplanationPart explain)
{
IValue retVal = null;
int token = context.LocalScope.PushContext();
AssignParameters(context, actuals);
Function function = context.FindOnStack(Function).Value as Function;
if (function != null)
{
double speed = GetDoubleValue(context.FindOnStack(Speed).Value);
Parameter parameter = (Parameter)function.FormalParameters[0];
int token2 = context.LocalScope.PushContext();
context.LocalScope.SetGraphParameter(parameter);
Graph graph = function.CreateGraph(context, (Parameter)function.FormalParameters[0], explain);
context.LocalScope.PopContext(token2);
if (graph != null)
{
double solutionX = graph.SolutionX(speed);
if (solutionX == double.MaxValue)
{
Range distanceType = (Range)EFSSystem.FindByFullName("Default.BaseTypes.Distance");
retVal = distanceType.findEnumValue("Unknown");
}
else
{
retVal = new DoubleValue(EFSSystem.DoubleType, solutionX);
}
}
else
{
Function.AddError("Cannot evaluate graph for function while computing the distance for the given speed");
}
}
else
{
Function.AddError("Cannot get function for " + Function);
}
context.LocalScope.PopContext(token);
return(retVal);
}
/// <summary>
/// Provides the model element referenced by this shortcut
/// </summary>
/// <returns></returns>
public Namable GetReference()
{
return((Namable)EFSSystem.FindByFullName(ShortcutName));
}
