public override void Initialize(EntityExtensions extensions)
{
if (!RuleDebugger.CheckNoNotifyPropertyChangedWarning(extensions.Target))
{
return;
}
var r = new RecursionObject {
Extensions = extensions, Strategy = this
};
// Wire notify property changed
((INotifyPropertyChanged)extensions.Target).PropertyChanged += r.OnPropertyChanged;
// Wire notify collection changed
foreach (var collection in GetCollections(extensions.Target))
{
if (RuleDebugger.CheckNoNotifyCollectionChangedWarning(collection))
{
((INotifyCollectionChanged)collection).CollectionChanged += r.OnCollectionChanged;
}
}
// Set parent
foreach (var childObject in GetAllChildObjects(extensions.Target))
{
childObject.Parent = extensions;
}
}
public bool Validate(bool forceValidate = false)
{
if (!(forceValidate || Condition(Extensions.Target)))
{
return(BrokenRule == null);
}
RuleDebugger.Info("Validating rule " + Name);
bool status;
using (new RuleEvaluationContext(this))
status = OnValidate();
if (!status)
{
if (BrokenRule == null)
{
OnRuleBroke();
}
else
{
UpdateBrokenRule(BrokenRule);
}
}
else if (status && BrokenRule != null)
{
OnRuleRepaired();
}
RuleDebugger.Info("Validation status: " + (status ? "valid" : "failed"));
return(status);
}
public static T Suppresses <T>(this T rule, Rule rule2)
where T : Rule
{
if (string.IsNullOrEmpty(rule.Name))
{
rule.Name = "tempName_" + Guid.NewGuid();
RuleDebugger.Warning("Rule was given a temporary name for the sake of suppression.");
}
rule2.SuppressedRules.Add(rule.Name);
return(rule);
}
internal void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
{
var extensions = Strategy.GetProperty(Extensions.Target, e.PropertyName);
if (extensions != null)
{
// Set parent to null
object oldValue;
_objects.TryGetValue(e.PropertyName, out oldValue);
if (oldValue != null)
{
((IEntityExtensions)oldValue).Parent = null;
}
// Set parent to value
extensions.Parent = Extensions;
_objects[e.PropertyName] = extensions;
}
var collection = Strategy.GetCollection(Extensions.Target, e.PropertyName);
if (RuleDebugger.CheckNoNotifyCollectionChangedWarning(collection))
{
var ncc = (INotifyCollectionChanged)collection;
// Unwire collection
object oldValue;
if (_objects.TryGetValue(e.PropertyName, out oldValue))
{
var oldncc = (INotifyCollectionChanged)oldValue;
oldncc.CollectionChanged -= OnCollectionChanged;
// Set old to null
foreach (var element in Strategy.GetCollectionElements((IEnumerable)oldncc))
{
element.Parent = null;
}
}
// Wire new
ncc.CollectionChanged += OnCollectionChanged;
// Set child parent to value
foreach (var element in Strategy.GetCollectionElements(collection))
{
element.Parent = Extensions;
}
}
//// Todo: Item[]
}
private bool WireCollectionElement(object obj)
{
var npc = obj as INotifyPropertyChanged;
if (npc != null)
{
npc.PropertyChanged += OnCollectionElementChanged;
return(true);
}
var message = string.Format(
"{0}: \"{1}\" doesn't imlement INotifyCollectionChanged.",
obj.GetType().Name, obj);
RuleDebugger.CheckInternal(RuleDebugger.NoNotifyPropertyChangedWarning, message);
return(false);
}
public bool Validate()
{
RuleDebugger.Info("Validating rule " + Name);
bool status;
using (new RuleEvaluationContext(this))
status = OnValidate();
if (!status && BrokenRule == null)
{
OnRuleBroke();
}
else if (status && BrokenRule != null)
{
OnRuleRepaired();
}
RuleDebugger.Info("Validation status: " + (status ? "valid" : "failed"));
return(status);
}
protected override Expression VisitConstant(ConstantExpression c)
{
RuleDebugger.CheckClosureWarning(c.Type, _expression);
return(base.VisitConstant(c));
}