public WTree(IHeap heap)
{
if (heap == null)
{
throw new NullReferenceException("heap");
}
Heap = heap;
if (Heap.Exists(0))
{
//create root branch with fictive type and handle.
RootBranch = new Branch(this, NodeType.Leaf, 1);
//read settings & root cache (always at handle 0).
byte[] buffer = Heap.Read(0);
using (MemoryStream ms = new MemoryStream(buffer))
{
Settings.Deserialize(this, ms);
RootBranch.Cache.Load(this, new BinaryReader(ms));
}
}
else
{
long headerHandle = Heap.ObtainHandle();
if (headerHandle != 0)
{
throw new Exception("Logical Error.");
}
RootBranch = new Branch(this, NodeType.Leaf);
}
CacheThread = new Thread(DoCache);
CacheThread.Start();
}
public WTree(IHeap heap)
{
if (heap == null)
{
throw new NullReferenceException("heap");
}
Heap = heap;
if (Heap.Exists(HANDLE_SETTINGS))
{
//create root branch with dummy handle
RootBranch = new Branch(this, NodeType.Leaf, 0);
//read settings - settings will set the RootBranch.NodeHandle
using (MemoryStream ms = new MemoryStream(Heap.Read(HANDLE_SETTINGS)))
Settings.Deserialize(this, ms);
//read scheme
using (MemoryStream ms = new MemoryStream(Heap.Read(HANDLE_SCHEME)))
scheme = Scheme.Deserialize(new BinaryReader(ms));
////load branch cache
//using (MemoryStream ms = new MemoryStream(Heap.Read(HANDLE_ROOT)))
// RootBranch.Cache.Load(this, new BinaryReader(ms));
isRootCacheLoaded = false;
}
else
{
//obtain reserved handles
var handle = Heap.ObtainHandle();
if (handle != HANDLE_SETTINGS)
{
throw new Exception("Logical error.");
}
scheme = new WaterfallTree.Scheme();
handle = Heap.ObtainHandle();
if (handle != HANDLE_SCHEME)
{
throw new Exception("Logical error.");
}
handle = Heap.ObtainHandle();
if (handle != HANDLE_ROOT)
{
throw new Exception("Logical error.");
}
handle = Heap.ObtainHandle();
if (handle != HANDLE_RESERVED)
{
throw new Exception("Logical error.");
}
RootBranch = new Branch(this, NodeType.Leaf); //the constructor will invoke Heap.ObtainHandle()
isRootCacheLoaded = true;
}
CacheThread = new Thread(DoCache);
CacheThread.Start();
}
