/// <summary>
/// Attempts to add the provided key/value to the Tree.
/// </summary>
/// <param name="key">the key to add</param>
/// <param name="value">the value to add</param>
/// <returns>returns true if successful, false if a duplicate key was found</returns>
public bool TryAdd(TKey key, TValue value)
{
if (LeafStorage.TryInsert(key, value))
{
if (IsDirty && AutoFlush)
{
m_header.SaveHeader(Stream);
}
return(true);
}
return(false);
}
/// <summary>
/// Creates a new root node by combining the current root node with the provided node data.
/// </summary>
/// <param name="leafKey"></param>
/// <param name="leafNodeIndex"></param>
private void CreateNewRootNode(TKey leafKey, uint leafNodeIndex)
{
if (RootNodeLevel + 1 > 250)
{
throw new Exception("Tree is full. Tree cannot exceede 250 levels in depth.");
}
int nodeLevel = RootNodeLevel + 1;
if (nodeLevel > m_nodes.Length)
{
SetCapacity(nodeLevel);
}
//Get the ID for the new root node.
uint oldRootNode = RootNodeIndexAddress;
RootNodeIndexAddress = m_getNextNewNodeIndex();
RootNodeLevel += 1;
//Create the empty node
SortedTreeNodeBase <TKey, SnapUInt32> rootNode = GetNode(RootNodeLevel);
rootNode.CreateEmptyNode(RootNodeIndexAddress);
//Insert the first entry in the root node.
m_tmpKey.SetMin();
m_tmpValue.Value = oldRootNode;
rootNode.TryInsert(m_tmpKey, m_tmpValue);
//Insert the second entry in the root node.
m_tmpValue.Value = leafNodeIndex;
rootNode.TryInsert(leafKey, m_tmpValue);
OnRootHasChanged();
//foreach (var node in m_nodes)
// node.Clear();
}
public static void TestNode <TKey, TValue>(SortedTreeNodeBase <TKey, TValue> node, TreeNodeRandomizerBase <TKey, TValue> randomizer, int count)
where TKey : SnapTypeBase <TKey>, new()
where TValue : SnapTypeBase <TValue>, new()
{
int Max = count;
uint rootKey = 0;
byte rootLevel = 0;
uint nextKeyIndex = 2;
bool hasChanged = false;
Func <uint> getNextKey = () =>
{
nextKeyIndex++;
return(nextKeyIndex - 1);
};
StringBuilder sb = new StringBuilder();
using (BinaryStream bs = new BinaryStream())
{
const int pageSize = 512;
SparseIndex <TKey> sparse = new SparseIndex <TKey>();
sparse.Initialize(bs, pageSize, getNextKey, 0, 1);
node.Initialize(bs, pageSize, getNextKey, sparse);
node.CreateEmptyNode(1);
TKey key = new TKey();
TKey key2 = new TKey();
TValue value = new TValue();
TValue value2 = new TValue();
randomizer.Reset(Max);
for (int x = 0; x < Max; x++)
{
randomizer.Next();
//Add the next point
randomizer.GetRandom(x, key, value);
//node.WriteNodeData(sb);
if (!node.TryInsert(key, value))
{
throw new Exception();
}
//node.WriteNodeData(sb);
//File.WriteAllText("c:\\temp\\temp.log", sb.ToString());
//Check if all points exist
for (int y = 0; y <= x; y++)
{
randomizer.GetRandom(y, key, value);
if (!node.TryGet(key, value2))
{
throw new Exception();
}
if (!value.IsEqualTo(value2))
{
throw new Exception();
}
}
//Check if scanner works.
SortedTreeScannerBase <TKey, TValue> scanner = node.CreateTreeScanner();
scanner.SeekToStart();
for (int y = 0; y <= x; y++)
{
randomizer.GetInSequence(y, key, value);
if (!scanner.Read(key2, value2))
{
throw new Exception();
}
if (!key.IsEqualTo(key2))
{
throw new Exception();
}
if (!value.IsEqualTo(value2))
{
throw new Exception();
}
}
if (scanner.Read(key2, value2))
{
throw new Exception();
}
}
node = node;
}
}
internal static void TestSpeed <TKey, TValue>(SortedTreeNodeBase <TKey, TValue> nodeInitializer, TreeNodeRandomizerBase <TKey, TValue> randomizer, int count, int pageSize)
where TKey : SnapTypeBase <TKey>, new()
where TValue : SnapTypeBase <TValue>, new()
{
int Max = count;
uint nextKeyIndex = 2;
Func <uint> getNextKey = () =>
{
nextKeyIndex++;
return(nextKeyIndex - 1);
};
using (BinaryStream bs = new BinaryStream())
{
randomizer.Reset(Max);
for (int x = 0; x < Max; x++)
{
randomizer.Next();
}
TKey key = new TKey();
TValue value = new TValue();
SortedTreeNodeBase <TKey, TValue> node = null;
System.Console.WriteLine(StepTimer.Time(count, (sw) =>
{
nextKeyIndex = 2;
node = nodeInitializer.Clone(0);
SparseIndex <TKey> sparse = new SparseIndex <TKey>();
sparse.Initialize(bs, pageSize, getNextKey, 0, 1);
node.Initialize(bs, pageSize, getNextKey, sparse);
node.CreateEmptyNode(1);
sw.Start();
for (int x = 0; x < Max; x++)
{
//Add the next point
randomizer.GetRandom(x, key, value);
if (!node.TryInsert(key, value))
{
throw new Exception();
}
}
sw.Stop();
}));
System.Console.WriteLine(StepTimer.Time(count, () =>
{
for (int x = 0; x < Max; x++)
{
//Add the next point
randomizer.GetRandom(x, key, value);
if (!node.TryGet(key, value))
{
throw new Exception();
}
}
}));
System.Console.WriteLine(StepTimer.Time(count, () =>
{
SortedTreeScannerBase <TKey, TValue> scanner = node.CreateTreeScanner();
scanner.SeekToStart();
while (scanner.Read(key, value))
{
;
}
}));
node = node;
}
}