private int FindFirstMatchingRecord()
{
int rec = -1;
int lo = 0;
int hi = _index.RecordCount - 1;
while (lo <= hi)
{
int i = lo + hi >> 1;
int recNo = _index.GetRecord(i);
int c = Evaluate(recNo);
if (c == 0)
{
rec = i;
}
if (c < 0)
{
lo = i + 1;
}
else
{
hi = i - 1;
}
}
return(rec);
}
internal static DataRow?GetParentRow(DataKey parentKey, DataKey childKey, DataRow childRow, DataRowVersion version)
{
if (!childRow.HasVersion((version == DataRowVersion.Original) ? DataRowVersion.Original : DataRowVersion.Current))
{
if (childRow._tempRecord == -1)
{
return(null);
}
}
object[] values = childRow.GetKeyValues(childKey, version);
if (IsKeyNull(values))
{
return(null);
}
Index index = parentKey.GetSortIndex((version == DataRowVersion.Original) ? DataViewRowState.OriginalRows : DataViewRowState.CurrentRows);
Range range = index.FindRecords(values);
if (range.IsNull)
{
return(null);
}
if (range.Count > 1)
{
throw ExceptionBuilder.MultipleParents();
}
return(parentKey.Table._recordManager[index.GetRecord(range.Min)]);
}
internal override void CheckConstraint(DataRow row, DataRowAction action)
{
if (Table.EnforceConstraints &&
(action == DataRowAction.Add ||
action == DataRowAction.Change ||
(action == DataRowAction.Rollback && row.tempRecord != -1)))
{
if (row.HaveValuesChanged(Columns))
{
Index index = Key.GetSortIndex();
object[] values = row.GetColumnValues(Columns);
if (index.IsKeyInIndex(values))
{
#if DEBUG
if (CompModSwitches.Data_Constraints.TraceVerbose)
{
Debug.WriteLine("UniqueConstraint violation...");
string valuesText = "";
for (int i = 0; i < values.Length; i++)
{
valuesText = Convert.ToString(values[i]) + (i < values.Length - 1 ? ", " : "");
}
Debug.WriteLine(" constraint: " + this.GetDebugString());
Debug.WriteLine(" key values: " + valuesText);
Range range = index.FindRecords(values);
int record = index.GetRecord(range.Min);
Debug.WriteLine(" conflicting record: " + record.ToString());
}
#endif
throw ExceptionBuilder.ConstraintViolation(Columns, values);
}
}
}
}