public IEnumerable <TSnapshot> GetSnapshotsByParent(string parentType, string parentId)
{
ParentKey parentKey = new ParentKey(parentType, parentId);
List <TSnapshot> childSnapshot = null;
if (_parentMap.TryGetValue(parentKey, out childSnapshot))
{
foreach (var snapshot in childSnapshot)
{
yield return(SerializeRoundTripSnapshot(snapshot));
}
}
}
public IEnumerable <EntityReference> GetSnapshotReferencesByParent(string parentType, string parentId)
{
ParentKey parentKey = new ParentKey(parentType, parentId);
List <TSnapshot> childSnapshot = null;
if (_parentMap.TryGetValue(parentKey, out childSnapshot))
{
foreach (var snapshot in childSnapshot)
{
yield return(new EntityReference(EntityTypeLookups.GetEntityType(typeof(TSnapshot)).Name, snapshot.EntityID));
}
}
}
private void RemoveCurrentSnapshot(TSnapshot snapshot)
{
var currentSnapshot = FindCurrentSnapshot(snapshot);
if (currentSnapshot == null)
{
return;
}
if (currentSnapshot.Parent?.EntityID != null)
{
ParentKey parentKey = new ParentKey(currentSnapshot.Parent.EntityType, currentSnapshot.Parent.EntityID);
List <TSnapshot> childList = null;
if (_parentMap.TryGetValue(parentKey, out childList))
{
childList.Remove(currentSnapshot);
}
}
_identityMap.Remove(snapshot.EntityID);
}
public void StoreSnapshot(TSnapshot snapshot)
{
snapshot = SerializeRoundTripSnapshot(snapshot);
RemoveCurrentSnapshot(snapshot);
_identityMap.Add(snapshot.EntityID, snapshot);
if (snapshot.Parent?.EntityID != null)
{
ParentKey parentKey = new ParentKey(snapshot.Parent.EntityType, snapshot.Parent.EntityID);
List <TSnapshot> childList = null;
if (_parentMap.TryGetValue(parentKey, out childList))
{
childList.Add(snapshot);
}
else
{
childList = new List <TSnapshot>();
childList.Add(snapshot);
_parentMap.Add(parentKey, childList);
}
}
}
