private BTreeValue <TKey, TKeyData, TData> ReturnFromLeft(TKey uid, BTreeValue <TKey, TKeyData, TData> current)
{
if (0 == current.BucketBeforeId)
{
return(null);
}
if (null == current.BucketBefore)
{
current.BucketBefore = Index.LoadBucket(current.BucketBeforeId);
}
return(current.BucketBefore.Find(uid));
}
private BTreeValue <TKey, TKeyData, TData> ReturnFromRight(TKey uid, BTreeValue <TKey, TKeyData, TData> current)
{
if (0 == current.BucketAfterId)
{
return(null);
}
if (null == current.BucketAfter)
{
current.BucketAfter = Index.LoadBucket(current.BucketAfterId);
}
return(current.BucketAfter.Find(uid));
}
/// <summary>
/// Generates a user-defined type (UDT) or user-defined aggregate from its binary form.
/// </summary>
/// <param name="r">The <see cref="T:System.IO.BinaryReader"/> stream from which the object is deserialized.</param>
public void Read(BinaryReader r)
{
Id = r.ReadInt32();
var cnt = r.ReadInt32();
BTreeValue <TKey, TKeyData, TData> last = null;
BTreeValue <TKey, TKeyData, TData> current = null;
for (var i = 0; i < cnt; i++)
{
current = new BTreeValue <TKey, TKeyData, TData> {
ContainingBucket = this
};
current.Read(r);
current.BucketBeforeId = r.ReadInt32();
if (0 != current.BucketBeforeId)
{
current.BucketBefore = new BTreeBucket <TKey, TKeyData, TData> {
Index = Index
};
current.BucketBefore.Read(r);
current.BucketBefore.Parent = this;
Index.PlainIndex[current.BucketBefore.Id] = current.BucketBefore;
}
if (null != last)
{
last.BucketAfterId = current.BucketBeforeId;
if (0 != current.BucketBeforeId)
{
last.BucketAfter = current.BucketBefore;
}
}
last = current;
if (cnt - 1 == i)
{
current.BucketAfterId = r.ReadInt32();
if (0 != current.BucketAfterId)
{
current.BucketAfter = new BTreeBucket <TKey, TKeyData, TData>();
current.BucketAfter.Index = Index;
current.BucketAfter.Read(r);
current.BucketAfter.Parent = this;
this.Index.PlainIndex[current.BucketAfter.Id] = current.BucketAfter;
}
}
this.Values.Add(current);
}
}
/// <summary>
/// Метод встраивания значения в текущий букет - добавляет к набору если отсутствует и переупорядочивает
/// </summary>
/// <param name="uid"></param>
/// <param name="keydata"></param>
/// <param name="data"></param>
private void StoreHere(TKey uid, TKeyData keydata, TData[] data)
{
BTreeValue <TKey, TKeyData, TData> value = null;
if (Index.SelfDataOnly)
{
value = new BTreeValue <TKey, TKeyData, TData> {
Key = uid, Value = keydata
};
}
else
{
value = new BTreeValue <TKey, TKeyData, TData> {
Key = uid, Value = Index.CreateDataStorage()
};
}
value.ContainingBucket = this;
int insertIndex = -1;
for (var i = 0; i < Values.Count; i++)
{
if (Values[i].Key.CompareTo(uid) > 0)
{
insertIndex = i;
break;
}
}
if (-1 == insertIndex)
{
Values.Add(value);
}
else
{
Values.Insert(insertIndex, value);
}
MarkChanged();
if (null != data && 0 != data.Length)
{
Index.AppendData(value.Value, data);
}
}
private void StoreLeft(TKey uid, TKeyData keydata, TData[] data, BTreeValue <TKey, TKeyData, TData> current, int ix)
{
if (0 == current.BucketBeforeId)
{
var newbucket = Index.CreateBucket();
current.BucketBeforeId = newbucket.Id;
current.BucketBefore = newbucket;
MarkChanged();
}
if (null == current.BucketBefore)
{
current.BucketBefore = Index.LoadBucket(current.BucketBeforeId);
}
if (0 != ix)
{
Values[ix - 1].BucketAfterId = current.BucketBeforeId;
Values[ix - 1].BucketAfter = current.BucketBefore;
}
current.BucketBefore.EnsureValue(uid, keydata, data);
}
/// <summary>
/// Встраивает объект в родительский
/// </summary>
/// <param name="mediana"></param>
private void StoreValueAfterSplit(BTreeValue <TKey, TKeyData, TData> mediana)
{
bool wasfull = IsFull;
int insertIndex = -1;
for (var i = 0; i < Values.Count; i++)
{
if (Values[i].Key.CompareTo(mediana.Key) > 0)
{
insertIndex = i;
break;
}
}
if (-1 == insertIndex)
{
insertIndex = Values.Count;
Values.Add(mediana);
}
else
{
Values.Insert(insertIndex, mediana);
}
if (0 != insertIndex && Values[insertIndex - 1].BucketAfterId != mediana.BucketBeforeId)
{
Values[insertIndex - 1].BucketAfterId = mediana.BucketBeforeId;
Values[insertIndex - 1].BucketAfter = mediana.BucketBefore;
}
if (Values.Count - 1 != insertIndex && Values[insertIndex + 1].BucketBeforeId != mediana.BucketAfterId)
{
Values[insertIndex + 1].BucketBeforeId = mediana.BucketAfterId;
Values[insertIndex + 1].BucketBefore = mediana.BucketAfter;
}
if (wasfull)
{
DoSplit();
}
}
