//it really boils my charcholes that I cant make this thing copy the root level:
// A) it would force this object to be statically typed to TSubject, else it cant use the Proxyfactory's MakeVersioning()
// B) I have to inject a proxy factory, a clone factory, and the object content (else I cant use ProxyFactory's MakeVersioning()
// C) the visitor has no concept of a return type, and fundamentally since I'm trying to clone a tree I need to return the tree's clone.
// D) it means another custom entry in IVisitorFactory (because this visitor will have to take constructor args)
public override void OnEntry(IVersionControlNode controlNode)
{
Debug.Assert(controlNode.Mutations.IsOrderedBy(mutation => mutation.TimeStamp));
copyMutationHistoryIntoNewMemory(controlNode);
updateChildrenToNewMemory(controlNode);
}
public override void OnEntry(IVersionControlNode controlNode)
{
var relatedMutations = controlNode.Mutations.Where(mutation => mutation.TimeStamp > _targetTime);
foreach (var mutation in relatedMutations)
{
mutation.IsActive = false;
}
}
public override void OnEntry(IVersionControlNode controlNode)
{
if (! VisitAllNodes && _hasRunOnce)
{
return;
}
_hasRunOnce = true;
_descendents.Add(controlNode);
}
public static void RecursiveAccept(IVersionControlNode hostingNode, IVersionControlTreeVisitor visitor)
{
visitor.OnEntry(hostingNode);
// ReSharper disable ForCanBeConvertedToForeach -- might cause a concurrency issue. TODO
for (var i = 0; i < hostingNode.Children.Count; i++)
// ReSharper restore ForCanBeConvertedToForeach
{
hostingNode.Children[i].RecursiveAccept(visitor);
}
visitor.OnExit(hostingNode);
}
private void updateChildrenToNewMemory(IVersionControlNode controlNode)
{
var candidatesByIndex = GetCadidatesByIndex(controlNode);
var children = candidatesByIndex.GroupBy(mutation => mutation.Value.TargetSite)
.Select(group => @group.Last())
.Select(mutation => mutation.Value.Arguments.Single().GetVersionControlNode());
controlNode.Children.Clear();
controlNode.Children.AddRange(children);
}
private void copyMutationHistoryIntoNewMemory(IVersionControlNode controlNode)
{
var candidatesByIndex = GetCadidatesByIndex(controlNode);
foreach (var indexCandidatePair in candidatesByIndex)
{
var versioningChild = indexCandidatePair.Value.Arguments.Single();
var versioningPropertyValueClone = versioningChild.GetVersionControlNode().CurrentDepthCopy();
controlNode.Mutations[indexCandidatePair.Key] = new TimestampedPropertyVersionDelta(indexCandidatePair.Value,
versioningPropertyValueClone);
}
}
public static void Accept(IVersionControlNode hostingNode, IVersionControlTreeVisitor visitor)
{
visitor.OnFirstEntry();
hostingNode.RecursiveAccept(visitor);
visitor.OnLastExit();
}
public virtual void OnExit(IVersionControlNode controlNode)
{
}
private IEnumerable<KeyValuePair<int, TimestampedPropertyVersionDelta>> GetCadidatesByIndex(IVersionControlNode node)
{
return from index in Enumerable.Range(0, node.Mutations.Count)
where node.Mutations[index].IsSettingVersioningObject
select new KeyValuePair<int, TimestampedPropertyVersionDelta>(index, node.Mutations[index]);
}
public virtual void OnExit(IVersionControlNode controlNode)
{
}