| private GetAggregateValue ( int records, AggregateType kind ) : object | ||
| records | int | |
| kind | AggregateType | |
| return | object | |
internal override object Eval(DataRow row, DataRowVersion version)
{
if (_childTable == null)
{
throw ExprException.AggregateUnbound(ToString());
}
DataRow[] rows;
if (_local)
{
rows = new DataRow[_childTable.Rows.Count];
_childTable.Rows.CopyTo(rows, 0);
}
else
{
if (row == null)
{
throw ExprException.EvalNoContext();
}
if (_relation == null)
{
throw ExprException.AggregateUnbound(ToString());
}
rows = row.GetChildRows(_relation, version);
}
int[] records;
if (version == DataRowVersion.Proposed)
{
version = DataRowVersion.Default;
}
List <int> recordList = new List <int>();
for (int i = 0; i < rows.Length; i++)
{
if (rows[i].RowState == DataRowState.Deleted)
{
if (DataRowAction.Rollback != rows[i]._action)
{
continue;
}
Debug.Assert(DataRowVersion.Original == version, "wrong version");
version = DataRowVersion.Original;
}
else if ((DataRowAction.Rollback == rows[i]._action) && (rows[i].RowState == DataRowState.Added))
{
continue;
}
if (version == DataRowVersion.Original && rows[i]._oldRecord == -1)
{
continue;
}
recordList.Add(rows[i].GetRecordFromVersion(version));
}
records = recordList.ToArray();
return(_column.GetAggregateValue(records, _type));
}
internal override object Eval(DataRow row, DataRowVersion version)
{
#if DEBUG
if (CompModSwitches.AggregateNode.TraceVerbose)
{
Debug.WriteLine("Eval " + this.ToString() + ", version " + version.ToString());
}
#endif
if (table == null)
{
throw ExprException.AggregateUnbound(this.ToString());
}
DataRow[] rows;
if (local)
{
rows = new DataRow[table.Rows.Count];
table.Rows.CopyTo(rows, 0);
}
else
{
if (row == null)
{
throw ExprException.EvalNoContext();
}
if (relation == null)
{
throw ExprException.AggregateUnbound(this.ToString());
}
rows = row.GetChildRows(relation, version);
}
#if DEBUG
if (CompModSwitches.AggregateNode.TraceVerbose)
{
Debug.WriteLine("Eval " + this.ToString() + ", # of Rows: " + rows.Length.ToString());
}
#endif
int[] records;
if (version == DataRowVersion.Proposed)
{
version = DataRowVersion.Default;
}
records = new int[rows.Length];
for (int i = 0; i < rows.Length; i++)
{
records[i] = rows[i].GetRecordFromVersion(version);
}
return(column.GetAggregateValue(records, type));
}