public virtual IVariableInstance GetVariableInstance(string variableName, bool fetchAllVariables)
{
// Transient variable
if (transientVariabes != null && transientVariabes.ContainsKey(variableName))
{
return(transientVariabes[variableName]);
}
// Check the local single-fetch cache
if (usedVariablesCache.ContainsKey(variableName))
{
return(usedVariablesCache[variableName]);
}
if (fetchAllVariables == true)
{
EnsureVariableInstancesInitialized();
variableInstances.TryGetValue(variableName, out IVariableInstanceEntity variableInstance);
if (variableInstance != null)
{
return(variableInstance);
}
// Go up the hierarchy
IVariableScope parentScope = ParentVariableScope;
if (parentScope != null)
{
return(parentScope.GetVariableInstance(variableName, true));
}
return(null);
}
else
{
if (variableInstances != null && variableInstances.ContainsKey(variableName))
{
return(variableInstances[variableName]);
}
IVariableInstanceEntity variable = GetSpecificVariable(variableName);
if (variable != null)
{
usedVariablesCache[variableName] = variable;
return(variable);
}
// Go up the hierarchy
IVariableScope parentScope = ParentVariableScope;
if (parentScope != null)
{
return(parentScope.GetVariableInstance(variableName, false));
}
return(null);
}
}