internal static GroupingSegment <TKey, TElement> Create(DirtyTracker tracker, byte[] bytes, int offset, out int byteSize)
{
var segment = new GroupingSegment <TKey, TElement>();
tracker = tracker.CreateChild();
segment.tracker = tracker;
var keyFormatter = Formatter <TKey> .Default;
var listFormatter = Formatter <IList <TElement> > .Default;
int keySize;
segment.key = keyFormatter.Deserialize(ref bytes, offset, tracker, out keySize);
segment.hashCode = BinaryUtil.ReadInt32(ref bytes, offset + keySize);
int listSize;
segment.elements = listFormatter.Deserialize(ref bytes, offset + keySize + 4, tracker, out listSize);
byteSize = keySize + 4 + listSize;
segment.originalBytes = new ArraySegment <byte>(bytes, offset, byteSize);
return(segment);
}
public IEnumerable <TElement> this[TKey key]
{
get
{
GroupingSegment <TKey, TElement> grouping = GetGrouping(key, create: false);
if (grouping != null)
{
return(grouping);
}
return(EmptyArray);
}
}
GroupingSegment <TKey, TElement> GetGrouping(TKey key, bool create)
{
int hashCode = (key == null) ? 0 : comparer.GetHashCode(key) & 0x7FFFFFFF;
IList <GroupingSegment <TKey, TElement> > groupList = groupings[hashCode % groupings.Count];
if (groupList != null)
{
for (int i = 0; i < groupList.Count; i++)
{
var g = groupList[i];
if (g.hashCode == hashCode && comparer.Equals(g.key, key))
{
return(g);
}
}
}
if (create)
{
int index = hashCode % groupings.Count;
var g = new GroupingSegment <TKey, TElement>(key, hashCode);
var list = groupings[index];
if (list == null)
{
list = groupings[index] = new List <GroupingSegment <TKey, TElement> >();
}
list.Add(g);
count++;
return(g);
}
return(null);
}
