private static IEnumerable <RuleViewModelBase> TraverseRulesTree(this RuleParentViewModelBase parent)
{
foreach (var rule in parent.Rules)
{
yield return(rule);
var ruleParent = rule as RuleParentViewModelBase;
if (ruleParent == null)
{
continue;
}
foreach (var childRule in ruleParent.TraverseRulesTree())
{
yield return(childRule);
}
}
}
public static bool IsParentOf(this RuleParentViewModelBase ruleParent, RuleViewModelBase rule)
{
return(ruleParent.TraverseRulesTree()
.Any(r => r == rule));
}
public RuleViewModelBase Create(IRule rule, RuleParentViewModelBase parent)
{
return(_typeActivators[rule.GetType()](rule, parent));
}