public unsafe void RenameTree(Transaction tx, string fromName, string toName)
{
if (tx.Flags == (TransactionFlags.ReadWrite) == false)
throw new ArgumentException("Cannot rename a new tree with a read only transaction");
if (toName.Equals(Constants.RootTreeName, StringComparison.InvariantCultureIgnoreCase) ||
toName.Equals(Constants.FreeSpaceTreeName, StringComparison.InvariantCultureIgnoreCase))
throw new InvalidOperationException("Cannot create a tree with reserved name: " + toName);
if (tx.ReadTree(toName) != null)
throw new ArgumentException("Cannot rename a tree with the name of an existing tree: " + toName);
Tree fromTree = tx.ReadTree(fromName);
if (fromTree == null)
throw new ArgumentException("Tree " + fromName + " does not exists");
Slice key = (Slice)toName;
tx.State.Root.Delete((Slice)fromName);
var ptr = tx.State.Root.DirectAdd(key, sizeof(TreeRootHeader));
fromTree.State.CopyTo((TreeRootHeader*) ptr);
fromTree.Name = toName;
fromTree.State.IsModified = true;
tx.RemoveTree(fromName);
tx.RemoveTree(toName);
tx.AddTree(toName, fromTree);
if (IsDebugRecording)
DebugJournal.RecordWriteAction(DebugActionType.RenameTree, tx, (Slice)toName, fromName, Stream.Null);
}
public void DeleteTree(Transaction tx, string name)
{
if (tx.Flags == (TransactionFlags.ReadWrite) == false)
throw new ArgumentException("Cannot create a new newRootTree with a read only transaction");
Tree tree = tx.ReadTree(name);
if (tree == null)
return;
foreach (var page in tree.AllPages())
{
tx.FreePage(page);
}
tx.State.Root.Delete((Slice) name);
tx.RemoveTree(name);
}