/// <summary>
/// Remove ObjectToRemove from the Collection if found, else throws an exception
/// </summary>
public void Remove(object item)
{
if (!Contains(item))
{
return;
}
Sop.DataBlock currBlock = this.GetCurrentDataBlock(true);
if (GetId(currBlock) >= 0)
{
MruManager.Remove(GetId(currBlock), true);
}
DataBlockDriver.Remove(this, currBlock);
}
//internal override bool RemoveInMemory(long DataAddress, Transaction.ITransactionLogger Transaction)
//{
// if (LastItem != null)
// LastItem.Clear();
// if (FirstItem != null)
// FirstItem.Clear();
// CurrentItem = null;
// base.RemoveInMemory(DataAddress, Transaction);
// return true;
//}
private void RemoveAt(long dataAddress, bool willMove)
{
if (willMove && !MoveTo(dataAddress))
{
return;
}
if (IsDeletedBlocksList && Count == 1)
{
return;
}
Sop.DataBlock currBlock = this.GetCurrentDataBlock(true);
if (FirstItem.DiskBuffer.DataAddress == dataAddress)
{
MoveFirst();
if (MoveNext())
{
FirstItem.DiskBuffer.DataAddress = CurrentItem.DiskBuffer.DataAddress;
CurrentItem.PreviousItemAddress = -1;
Sop.DataBlock db = WriteToBlock(CurrentItem, CurrentItem.DiskBuffer);
DataBlockDriver.SetDiskBlock(this, db, false);
}
else
{
long address = FirstItem.DiskBuffer.DataAddress;
FirstItem.DiskBuffer.DataAddress = LastItem.DiskBuffer.DataAddress = -1;
CurrentItem = FirstItem;
Sop.DataBlock db = WriteToBlock(CurrentItem, CurrentItem.DiskBuffer);
db.DataAddress = address;
DataBlockDriver.SetDiskBlock(this, db, false);
db.DataAddress = -1;
}
}
else if (LastItem.DiskBuffer.DataAddress == dataAddress)
{
if (MovePrevious() || FirstItem.DiskBuffer.DataAddress == CurrentItem.DiskBuffer.DataAddress)
{
LastItem.DiskBuffer.DataAddress = CurrentItem.DiskBuffer.DataAddress;
CurrentItem.NextItemAddress = -1;
Sop.DataBlock db = WriteToBlock(CurrentItem, CurrentItem.DiskBuffer);
DataBlockDriver.SetDiskBlock(this, db, false);
}
else
{
throw new InvalidOperationException("Can't go previous but First is not the only item.");
}
}
else
{
LinkedItemOnDisk curr = CurrentItem;
LinkedItemOnDisk prev = null, next = null;
if (MoveTo(curr.PreviousItemAddress))
{
prev = CurrentItem;
}
if (MoveTo(curr.NextItemAddress))
{
next = CurrentItem;
}
if (prev != null && next != null)
{
prev.NextItemAddress = curr.NextItemAddress;
next.PreviousItemAddress = curr.PreviousItemAddress;
Sop.DataBlock db = WriteToBlock(prev, prev.DiskBuffer);
DataBlockDriver.SetDiskBlock(this, db, false);
db = WriteToBlock(next, next.DiskBuffer);
DataBlockDriver.SetDiskBlock(this, db, false);
}
}
if (MruManager.Count > 0)
{
MruManager.Remove(dataAddress, true);
}
DataBlockDriver.Remove(this, currBlock);
}