/// <summary>
/// Method to open an sbn index file
/// </summary>
/// <param name="sbnFilename">The sbn index filename></param>
/// <returns>An sbn index query structure</returns>
public static SbnQueryOnlyTree Open(string sbnFilename)
{
if (string.IsNullOrEmpty(sbnFilename))
{
throw new ArgumentNullException(sbnFilename);
}
if (!File.Exists(sbnFilename))
{
throw new FileNotFoundException("File not found", sbnFilename);
}
var sbxFilename = Path.ChangeExtension(sbnFilename, "sbx");
if (!File.Exists(sbxFilename))
{
throw new FileNotFoundException("File not found", sbxFilename);
}
var res = new SbnQueryOnlyTree(sbnFilename, sbxFilename);
var sbxHeader = new SbnHeader();
sbxHeader.Read(new BinaryReader(res._sbxStream));
if (res._sbnHeader.NumRecords != sbxHeader.NumRecords)
{
throw new SbnException("Sbn and Sbx do not serve the same number of features!");
}
return(res);
}
private SbnQueryOnlyNode(SbnQueryOnlyTree tree, int nid, byte[] splitBounds)
{
_tree = tree;
Nid = nid;
_minX = splitBounds[0];
_minY = splitBounds[1];
_maxX = splitBounds[2];
_maxY = splitBounds[3];
_features = ReadBins(nid, _tree._sbnBinIndex);
if (Level <= _tree.MaxCacheLevel)
{
_tree._sbnBinIndex.CacheNode(this);
}
}
internal static void CreateRoot(SbnQueryOnlyTree tree)
{
var root = new SbnQueryOnlyNode(tree, 1, new byte[] { 0, 0, 255, 255 });
}