/// <summary>
/// Gets a value from the tree
/// </summary>
/// <param name="Key"></param>
/// <returns></returns>
public Record GetValue(Record Key)
{
Record x = this.GetKeyValue(Key);
if (x == null)
{
return(null);
}
return(Record.Split(x, this._ValueFields));
}
/// <summary>
/// Gets a value from the tree
/// </summary>
/// <param name="Key"></param>
/// <returns></returns>
public Record GetValue2(Record Composite)
{
Record x = this.GetKeyValue(Composite);
if (x == null)
{
return(null);
}
return(Record.Split(x, this._ValueFields));
}
/// <summary>
/// Gets a record, invluding the key and value
/// </summary>
/// <param name="Key"></param>
/// <returns></returns>
public Record GetKeyValue2(Record Composite)
{
// Check the last key first //
if (this._LastKey != null)
{
if (Record.Compare(Record.Split(Composite, this._KeyFields), this._LastKey) == 0)
{
return(this._Cluster.Storage.GetPage(this._LastRef.PAGE_ID).Select(this._LastRef.ROW_ID));
}
}
// Get the record key //
RecordKey x = this._Cluster.FindFirst(Composite, true);
// This should really only trigger if the table is empty; actually, this should never trigger //
if (x.IsNotFound)
{
return(null);
}
// Select the record, and if it's null, return //
Record y = this._Cluster.Storage.TrySelect(x);
if (y == null)
{
return(null);
}
// Need to check if we didn't find the actual record //
if (Record.Compare(y, Composite, this._KeyFields) == 0)
{
this._LastRef = x;
this._LastKey = Record.Split(Composite, this._KeyFields);
return(y);
}
// Not found //
return(null);
}
/// <summary>
/// Splits a record according to a key
/// </summary>
/// <param name="R"></param>
/// <param name="K"></param>
/// <returns></returns>
public static Record operator *(Record R, Key K)
{
return(Record.Split(R, K));
}