public static BTreeNode ReadNode(BTree tree, byte[] buffer, int offset)
{
BTreeNodeDescriptor descriptor = (BTreeNodeDescriptor)Utilities.ToStruct <BTreeNodeDescriptor>(buffer, offset);
switch (descriptor.Kind)
{
case BTreeNodeKind.HeaderNode:
return(new BTreeHeaderNode(tree, descriptor));
case BTreeNodeKind.IndexNode:
case BTreeNodeKind.LeafNode:
throw new NotImplementedException("Attempt to read index/leaf node without key and data types");
default:
throw new NotImplementedException("Unrecognized BTree node kind: " + descriptor.Kind);
}
}
public static BTreeNode ReadNode <TKey>(BTree tree, byte[] buffer, int offset)
where TKey : BTreeKey, new()
{
BTreeNodeDescriptor descriptor = (BTreeNodeDescriptor)Utilities.ToStruct <BTreeNodeDescriptor>(buffer, offset);
switch (descriptor.Kind)
{
case BTreeNodeKind.HeaderNode:
return(new BTreeHeaderNode(tree, descriptor));
case BTreeNodeKind.LeafNode:
return(new BTreeLeafNode <TKey>(tree, descriptor));
case BTreeNodeKind.IndexNode:
return(new BTreeIndexNode <TKey>(tree, descriptor));
default:
throw new NotImplementedException("Unrecognized BTree node kind: " + descriptor.Kind);
}
}
public BTreeHeaderNode(BTree tree, BTreeNodeDescriptor descriptor)
: base(tree, descriptor)
{
}
public BTreeLeafNode(BTree tree, BTreeNodeDescriptor descriptor)
: base(tree, descriptor)
{
}
public BTreeNode(BTree tree, BTreeNodeDescriptor descriptor)
{
_tree = tree;
_descriptor = descriptor;
}
public BTreeIndexNode(BTree tree, BTreeNodeDescriptor descriptor)
: base(tree, descriptor)
{
}