public BTree(int t, long root, Func <IFile, IFile, int> comparer, StreamManager manager)
{
this.t = t;
this.manager = manager;
this.comparer = comparer;
this.root = manager.DiskRead(root);
}
public void Open(Stream db)
{
if (open)
{
throw new InvalidOperationException("Debe CERRAR el stream antes de poder abrirlo de nuevo");
}
if (!db.CanRead)
{
var q = new FileStream("test.txt", FileMode.Open);
manager = new StreamManager(t, q);
open = true;
if (q.Length == 0)
{
path = new BTree(t, comparer[0], manager);
path.manager.OpenStream();
date = new BTree(t, comparer[1], manager);
date.manager.OpenStream();
size = new BTree(t, comparer[2], manager);
size.manager.OpenStream();
}
else
{
var trees = manager.LoadBTrees();
path = trees.item1;
path.manager.OpenStream();
date = trees.item2;
date.manager.OpenStream();
size = trees.item3;
size.manager.OpenStream();
}
}
else
{
manager = new StreamManager(t, db);
open = true;
if (db.Length == 0)
{
path = new BTree(t, comparer[0], manager);
path.manager.OpenStream();
date = new BTree(t, comparer[1], manager);
date.manager.OpenStream();
size = new BTree(t, comparer[2], manager);
size.manager.OpenStream();
}
else
{
var trees = manager.LoadBTrees();
path = trees.item1;
path.manager.OpenStream();
date = trees.item2;
date.manager.OpenStream();
size = trees.item3;
size.manager.OpenStream();
}
}
}
public BTree(int t, Func <IFile, IFile, int> comparer, StreamManager manager)
{
this.t = t;
manager.OpenStream();
this.manager = manager;
this.comparer = comparer;
root = AllocateNode();
root.leaf = true;
manager.UpdateRoot(root.offset, Array.IndexOf(MyFinder.comparer, comparer));
manager.DiskWrite(root);
}