virtual public void CopyTo(VirtualCollection <T> target)
{
Flush();
GZipHelper.CopyStream(StoreStream, target.StoreStream);
IndexBlock[] indexList = new IndexBlock[Index.Count];
Index.CopyTo(indexList);
target.Index = new List <IndexBlock>(indexList);
target.Transfer = Transfer;
}
public T Find(Predicate <IndexBlock> selector)
{
IndexBlock indexBlock = Index.Find(selector);
if (indexBlock == null)
{
return(default(T));
}
return(Find(indexBlock));
}
public T Find(IndexBlock indexBlock)
{
StoreStream.Position = indexBlock.StartPos;
int count = (int)(indexBlock.EndPos - indexBlock.StartPos);
byte[] buffer = new byte[count];
StoreStream.Read(buffer, 0, count);
using (var stream = new MemoryStream(buffer))
{
return(Transfer.Deserialize <T>(stream));
}
}
private void RegistIndex(object key, long startPosition, long endPosition)
{
IndexBlock block = Index.Find(it => it.Key == key);
if (block == null)
{
block = new IndexBlock()
{
Key = key, StartPos = startPosition, EndPos = endPosition
};
DoRegistIndex(block);
Index.Add(block);
}
}
protected override void DoRegistIndex(IndexBlock indexBlock)
{
indexTransfer.Serialize(indexBlock, indexStream);
}
abstract protected void DoRegistIndex(IndexBlock indexBlock);
override protected void DoRegistIndex(IndexBlock indexBlock)
{
}