//Creates a compute list with reference of indirect info to this list.
public ComputeList Clone()
{
ComputeList computeList = new ComputeList();
return computeList;
}
public void Optimize()
{
if (m_calculator == null)
{
System.Diagnostics.Debug.WriteLine("OptimizeManager.Optimize: m_calculator == null");
return;
}
//Contains dependices linked to expressions in calculator.
Hashtable optimizables = new Hashtable();
// If FindDependices returns false, the key is marked as not-optimizable.
Hashtable notOptimizables = new Hashtable();
//(28.07.2006 11:58)
//Reduce unecessary calls to the property.
m_functions = m_calculator.Functions;
#region "Finding Dependicies"
//Find all dependicies.
Expression[] expressions = m_calculator.GetExpressions();
foreach (Expression exp in expressions)
{
ArrayList deps = new ArrayList();
// Get all the dependices of expression.
// Use the variable name of expression key as relative.
if (!FindDependices(exp.Key, exp.Tree, deps, exp.Key.Substring(0, exp.Key.IndexOf(Calculator.PROPERTY_CHAR)), null, false))
{
// Mark as not optimizable.
if (!notOptimizables.Contains(exp.Key))
{
notOptimizables.Add(exp.Key, exp.Key);
}
}
else
{
// Check for direct property dependence.
object expObject = exp.Variable;
if (expObject is IOptimizable)
{
IOptimizable expOpt = (IOptimizable)expObject;
PropertyDependicy[] propDeps = expOpt.PropertyDependices;
if (propDeps != null)
{
foreach (PropertyDependicy propDep in propDeps)
{
if (propDep.ParentProperty == exp.PropName)
{
deps.Add(exp.Variable.Name + Calculator.PROPERTY_CHAR + propDep.ChildProperty);
}
}
}
}
if (deps.Count != 0)
{
DependicyInfo dependicy = new DependicyInfo();
dependicy.Key = exp.Key;
//Analyse each dependicy.
string[] depsTable = new string[deps.Count];
bool optimizable = true;
for (int i = 0; i <= depsTable.Length - 1; i++)
{
string nodeValue = (string)deps[i];
if (!optimizables.Contains(nodeValue))
{
//Create dependicy info.
DependicyInfo depNode = new DependicyInfo();
depNode.Key = nodeValue;
//Detect type.
depNode.Type = DependicyType(nodeValue);
//See if the dependicy is not optimizable.
if (depNode.Type == DependicyInfo.DEPENDICY_TYPE_NOT_LEGAL)
{
optimizable = false;
break;
}
else if (depNode.Type == DependicyInfo.DEPENDICY_TYPE_VARIABLE)
{
//See if variable inherits from IOptimizable.
object obj = m_calculator.Variable(depNode.Key);
if (!(obj is IOptimizable))
{
optimizable = false;
break;
}
}
else if (depNode.Type == DependicyInfo.DEPENDICY_TYPE_PROPERTY)
{
//See if variable inherits from IOptimizable.
int dotIndex = depNode.Key.IndexOf(Calculator.PROPERTY_CHAR);
string varName = depNode.Key.Substring(0, dotIndex);
object obj = m_calculator.Variable(varName);
if (!(obj is IOptimizable))
{
optimizable = false;
break;
}
}
//Add dependicy as optimizable.
optimizables.Add(nodeValue, depNode);
depsTable[i] = depNode.Key;
}
else
{
//Optimizable already exists.
depsTable[i] = nodeValue;
}
}
if (!optimizable)
{
notOptimizables.Add(exp.Key, exp.Key);
}
else
{
//Add as optimizable.
dependicy.Type = DependicyInfo.DEPENDICY_TYPE_EXPRESSION;
dependicy.Deps = depsTable;
//Remove temporary optimizable.
if (optimizables.Contains(exp.Key))
{
optimizables.Remove(exp.Key);
}
optimizables.Add(exp.Key, dependicy);
}
}
else
{
// Expression depends on no other.
DependicyInfo dep = new DependicyInfo();
dep.Deps = new string[] {};
dep.Type = DependicyInfo.DEPENDICY_TYPE_EXPRESSION;
dep.Key = exp.Key;
// Remove temporary optimizable.
if (optimizables.Contains(exp.Key))
{
optimizables.Remove(exp.Key);
}
optimizables.Add(dep.Key, dep);
}
}
}
#endregion
// Remove all not-optimizables from optimizables.
foreach (string key in notOptimizables.Values)
{
if (optimizables.Contains(key))
{
optimizables.Remove(key);
}
}
//Remove all optimalizables that depends on not-optimalizables.
Hashtable lastNotOptimizables = notOptimizables;
//Continue to remove optimizables that depends on not-optimizables
//until table of optimizables is clean.
while (lastNotOptimizables.Count != 0)
{
//Find all optimizables that depends on newly removed optimizables.
Hashtable tempNotOptimizables = new Hashtable();
foreach (DependicyInfo dep in optimizables.Values)
{
if (dep.Type == DependicyInfo.DEPENDICY_TYPE_EXPRESSION)
{
foreach (string depName in dep.Deps)
{
if (lastNotOptimizables[depName] != null)
{
tempNotOptimizables.Add(dep.Key, dep.Key);
//Remove child property dependices of dependicy.
int propIndex = depName.IndexOf(Calculator.PROPERTY_CHAR);
string variableName = depName.Substring(0, propIndex);
object obj = m_calculator.Variable(variableName);
if (obj is IOptimizable)
{
IOptimizable opt = (IOptimizable)obj;
if (opt.PropertyDependices != null)
{
foreach (PropertyDependicy propertyDep in opt.PropertyDependices)
{
if (propertyDep.ParentProperty == depName.Substring(propIndex + 1))
{
string childKey = variableName + Calculator.PROPERTY_CHAR + propertyDep.ChildProperty;
if (!tempNotOptimizables.Contains(childKey))
{
tempNotOptimizables.Add(childKey, childKey);
}
}
}
}
}
break;
}
}
}
}
//Remove from optimizables in end to not get enumeration exception.
foreach (string expName in tempNotOptimizables.Values)
{
optimizables.Remove(expName);
if (!notOptimizables.Contains(expName))
notOptimizables.Add(expName, expName);
}
lastNotOptimizables = tempNotOptimizables;
}
//Remove recursive.
foreach (DependicyInfo opt in optimizables.Values)
{
SortedList history = new SortedList();
Hashtable processed = new Hashtable(optimizables.Count);
RemoveRecursive(opt, optimizables, notOptimizables, history, processed);
}
//Remove all not-optimizables from optimizables.
foreach (string key in notOptimizables.Values)
{
if (optimizables.Contains(key))
{
optimizables.Remove(key);
}
}
IVariable[] variables = m_calculator.GetVariables();
foreach (IVariable variable in variables)
{
if (variable is IOptimizable)
{
IOptimizable obj = (IOptimizable)variable;
obj.PropertyChanged -= new PropertyChangedEventHandler(PropertyChanged);
}
}
#region "Dependicy Reversing"
//Build optimize graphs.
//Reverse the dependices.
Hashtable eventGraph = new Hashtable();
Hashtable objectMap = new Hashtable();
//(29.11.2006 12:15)
Hashtable processedEvents = new Hashtable();
foreach (DependicyInfo opt in optimizables.Values)
{
if (opt.Deps != null)
{
AddToEventList(opt, opt.Deps, optimizables, eventGraph, objectMap, processedEvents);
//An expression should update it self if it differ from it's previous value.
if (opt.Type == DependicyInfo.DEPENDICY_TYPE_EXPRESSION)
{
string varName = opt.Key.Substring(0, opt.Key.IndexOf(Calculator.PROPERTY_CHAR));
object obj = m_calculator.Variable(varName);
if (obj is IOptimizable)
{
IOptimizable optObj = (IOptimizable)obj;
if (!eventGraph.Contains(opt.Key))
{
if (!objectMap.Contains(optObj))
{
optObj.PropertyChanged += new PropertyChangedEventHandler(PropertyChanged);
objectMap.Add(optObj, varName);
}
eventGraph.Add(opt.Key, new ArrayList());
}
//Add to event list.
ArrayList events = (ArrayList)eventGraph[opt.Key];
if (!events.Contains(opt.Key))
{
events.Add(m_calculator.GetExpressionObject(opt.Key));
}
}
}
}
}
#endregion
m_computeList = new ComputeList();
m_eventGraph = eventGraph;
#region "Single Object Reference"
//Single expressions using object references, are not necessary to compute.
ArrayList objectReferences = new ArrayList();
foreach (string key in notOptimizables.Values)
{
string exp = m_calculator.GetExpression(key);
if (exp != null && System.Text.RegularExpressions.Regex.IsMatch(exp.Trim(), Calculator.NAME_REGEX))
{
objectReferences.Add(key);
}
}
foreach (string key in objectReferences)
{
notOptimizables.Remove(key);
}
//Remember the object references for later use.
m_objectReferences = objectReferences;
//Create list of not optimizable expressions.
ArrayList expressionList = new ArrayList();
foreach (string key in notOptimizables.Values)
{
Expression exp = m_calculator.GetExpressionObject(key);
if (exp != null)
{
expressionList.Add(exp);
}
}
#endregion
m_notOptimizables = new Expression[expressionList.Count];
expressionList.CopyTo(m_notOptimizables);
}