public void Write(BinaryWriter w)
{
if (w is null)
{
throw new ArgumentNullException(nameof(w));
}
if (IsNull)
{
throw new HierarchyIdException("24002: SqlHierarchyId.Write failed because 'this' was a NULL instance.");
}
BitWriter bw = new BitWriter(w);
var nodes = this._imp.GetNodes();
for (int i = 0; i < nodes.Length; i++)
{
var subNodes = nodes[i];
for (int j = 0; j < subNodes.Length; j++)
{
long val = subNodes[j];
BitPattern p = KnownPatterns.GetPatternByValue(val);
bool isLast = j == (subNodes.Length - 1);
ulong value = p.EncodeValue(val, isLast);
bw.Write(value, p.BitLength);
}
}
bw.Finish();
}
public void Read(BinaryReader r)
{
if (r is null)
{
throw new ArgumentNullException(nameof(r));
}
var bitR = new BitReader(r);
List <List <long> > result = new List <List <long> >();
while (true)
{
List <long> step = new List <long>();
while (true)
{
var p = KnownPatterns.GetPatternByPrefix(bitR);
if (p == null)
{
goto finish;
}
ulong encodedValue = bitR.Read(p.BitLength);
int value = p.Decode(encodedValue, out bool isLast);
step.Add(value);
if (isLast)
{
break;
}
}
result.Add(step);
}
finish:
this._imp = new HierarchyId(result.Select(a => a.ToArray()).ToArray());
this._isNotNull = !_imp.IsNull;
}
public static string RandomHierarhyId(Random random)
{
StringBuilder sb = new StringBuilder();
sb.Append("/");
var levels = random.Next(4);
for (int i = 0; i < levels; i++)
{
var subLevels = random.Next(1, 4);
for (int j = 0; j < subLevels; j++)
{
var pattern = KnownPatterns.RandomPattern(random);
sb.Append(random.NextLong(pattern.MinValue, pattern.MaxValue + 1).ToString());
if (j < subLevels - 1)
{
sb.Append(".");
}
}
sb.Append("/");
}
return(sb.ToString());
}