/// <summary>
///
/// </summary>
/// <param name="variableNames"></param>
/// <param name="fetchAllVariables"></param>
/// <returns></returns>
public virtual IDictionary <string, IVariableInstance> GetVariableInstances(IEnumerable <string> variableNames, bool fetchAllVariables)
{
IDictionary <string, IVariableInstance> requestedVariables = new Dictionary <string, IVariableInstance>();
ISet <string> variableNamesToFetch = new HashSet <string>(variableNames);
// The values in the fetch-cache will be more recent, so they can override any existing ones
foreach (string variableName in variableNames)
{
if (transientVariabes != null && transientVariabes.ContainsKey(variableName))
{
requestedVariables[variableName] = transientVariabes[variableName];
variableNamesToFetch.Remove(variableName);
}
else if (usedVariablesCache.ContainsKey(variableName))
{
requestedVariables[variableName] = usedVariablesCache[variableName];
variableNamesToFetch.Remove(variableName);
}
}
if (fetchAllVariables)
{
// getVariables() will go up the execution hierarchy, no need to do it here
// also, the cached values will already be applied too
IDictionary <string, IVariableInstance> allVariables = VariableInstances;
foreach (string variableName in variableNamesToFetch)
{
requestedVariables[variableName] = allVariables[variableName];
}
return(requestedVariables);
}
else
{
// Go up if needed
IVariableScope parent = ParentVariableScope;
if (parent != null)
{
requestedVariables.PutAll(parent.GetVariableInstances(variableNamesToFetch, fetchAllVariables));
}
// Fetch variables on this scope
IList <IVariableInstanceEntity> variables = GetSpecificVariables(variableNamesToFetch);
foreach (IVariableInstanceEntity variable in variables)
{
requestedVariables[variable.Name] = variable;
}
return(requestedVariables);
}
}