/// <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)
{
PlainIndex.Clear();
RootBucket = new BTreeBucket <TKey, TKeyData, TData> {
Index = this
};
RootBucket.Read(r);
RootBucketId = RootBucket.Id;
PlainIndex[RootBucketId] = RootBucket;
}
/// <summary>
///
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public BTreeBucket <TKey, TKeyData, TData> LoadBucket(int id)
{
if (null == Storage)
{
throw new Exception("no storage configured");
}
var bucket = new BTreeBucket <TKey, TKeyData, TData> {
Id = id, Index = this
};
PlainIndex[id] = bucket;
Storage.ReadBucket(id, bucket);
return(bucket);
}
/// <summary>
/// Создает новый букет
/// </summary>
/// <returns></returns>
public BTreeBucket <TKey, TKeyData, TData> CreateBucket()
{
if (null == Storage)
{
throw new Exception("no storage configured");
}
var uid = Storage.CreateBucket(BucketSize);
var bucket = new BTreeBucket <TKey, TKeyData, TData> {
Id = uid, Index = this
};
PlainIndex[uid] = bucket;
return(bucket);
}
private void DoSplitUp()
{
MarkChanged();
var mediana = Values[Index.BucketSize / 2];
mediana.ContainingBucket = null;
mediana.BucketBeforeId = Id;
mediana.BucketBefore = this;
var rightBucket = Index.CreateBucket();
rightBucket.MarkChanged();
mediana.BucketAfterId = rightBucket.Id;
mediana.BucketAfter = rightBucket;
var rest = Values.Skip(Index.BucketSize / 2 + 1).ToArray();
if (mediana.Value == null)
{
throw new Exception("here!!");
}
Values.Remove(mediana);
foreach (var value in rest)
{
rightBucket.Values.Add(value);
value.ContainingBucket = rightBucket;
Values.Remove(value);
}
BTreeBucket <TKey, TKeyData, TData> target = Parent;
if (IsRoot)
{
target = Index.CreateBucket();
mediana.ContainingBucket = target;
target.IsRoot = true;
Index.RootBucket = target;
Index.RootBucketId = target.Id;
this.IsRoot = false;
target.MarkChanged();
target.Values.Add(mediana);
Parent = target;
}
else
{
mediana.ContainingBucket = target;
Parent.StoreValueAfterSplit(mediana);
}
rightBucket.Parent = target;
target.MarkChanged();
}
private void CheckRoot()
{
if (null == RootBucket)
{
if (0 == RootBucketId)
{
RootBucketId = Storage.GetRoot();
}
if (0 == RootBucketId)
{
RootBucketId = Storage.CreateBucket(BucketSize);
}
RootBucket = LoadBucket(RootBucketId);
RootBucket.IsRoot = true;
}
}
/// <summary>
///
/// </summary>
/// <param name="uid"></param>
/// <param name="size"></param>
/// <param name="targetBucket"></param>
public void WriteBucket(int uid, int size, BTreeBucket <TKey, TKeyData, TData> targetBucket)
{
}
/// <summary>
/// Загрузить букет
/// </summary>
/// <param name="uid"></param>
/// <param name="targetBucket"></param>
public void ReadBucket(int uid, BTreeBucket <TKey, TKeyData, TData> targetBucket)
{
}
