/// <summary>
/// Shallow copy the Collection into a new instance and return it.
/// </summary>
public virtual object Clone()
{
var lid = new LinkedListOnDisk
{
File = File,
DataBlockSize = DataBlockSize,
HintSizeOnDisk = HintSizeOnDisk,
currentEntry = currentEntry,
DataAddress = DataAddress,
MruManager = MruManager,
MruMinCapacity = MruMinCapacity,
MruMaxCapacity = MruMaxCapacity,
SyncRoot = this.SyncRoot,
DataBlockDriver = this.DataBlockDriver,
FirstItem = new LinkedItemOnDisk(File.DataBlockSize)
};
lid.CurrentItem = lid.FirstItem;
lid.LastItem = new LinkedItemOnDisk(File.DataBlockSize);
int systemDetectedBlockSize;
lid.FileStream = File.UnbufferedOpen(out systemDetectedBlockSize);
lid.isOpen = true;
lid.IsCloned = true;
lid.Name = Name; // string.Format("{0} Clone", Name);
lid.OnDiskBinaryWriter = new OnDiskBinaryWriter(File.Server.Encoding);
lid.OnDiskBinaryReader = new OnDiskBinaryReader(File.Server.Encoding);
return(lid);
}
/// <summary>
/// Shared Block on Disk purifies data and only saves one
/// copy of Meta data in it.
/// </summary>
/// <param name="biod"></param>
/// <param name="db"></param>
protected override void PurifyMeta(LinkedItemOnDisk biod, Sop.DataBlock db)
{
if (db.SizeOccupied > 0)
{
//** purify data by separating meta data from it so meta data won't be serialized more than once
int metaDataSize = LinkedListOnDisk.SizeOfMetaData(this);
int newSize = db.SizeOccupied - metaDataSize;
byte[] newData = new byte[newSize];
Array.Copy(db.Data, metaDataSize, newData, 0, newSize);
//** assign data to block for serialization
biod.Data = newData;
}
}
public ListOnDiskEnumerator(LinkedListOnDisk lid)
{
this._listOnDisk = lid;
this.Reset();
}