public void GroupBy(string groupColumnNames, string aggregateColumnNames = null)
{
// TODO: Сворачиваем за N^2. Переделать на N*log(N)
List <ValueTableColumn> GroupColumns = GetProcessingColumnList(groupColumnNames, true);
List <ValueTableColumn> AggregateColumns = GetProcessingColumnList(aggregateColumnNames, true);
List <ValueTableRow> new_rows = new List <ValueTableRow>();
foreach (ValueTableRow row in _rows)
{
StructureImpl search = new StructureImpl();
foreach (ValueTableColumn Column in GroupColumns)
{
search.Insert(Column.Name, row.Get(Column));
}
ValueTableRow new_row = null;
foreach (ValueTableRow nrow in new_rows)
{
if (CheckFilterCriteria(nrow, search))
{
new_row = nrow;
break;
}
}
if (new_row == null)
{
new_row = new ValueTableRow(this);
foreach (ValueTableColumn Column in GroupColumns)
{
new_row.Set(Column, row.Get(Column));
}
new_rows.Add(new_row);
}
foreach (ValueTableColumn Column in AggregateColumns)
{
IValue old = new_row.Get(Column);
decimal d_old;
if (old.DataType != Machine.DataType.Number)
{
d_old = 0;
}
else
{
d_old = old.AsNumber();
}
IValue current = row.Get(Column);
decimal d_current;
if (current.DataType != Machine.DataType.Number)
{
d_current = 0;
}
else
{
d_current = current.AsNumber();
}
new_row.Set(Column, ValueFactory.Create(d_old + d_current));
}
}
_rows.Clear();
_rows.AddRange(new_rows);
{
int i = 0;
while (i < _columns.Count())
{
ValueTableColumn Column = _columns.FindColumnByIndex(i);
if (GroupColumns.IndexOf(Column) == -1 && AggregateColumns.IndexOf(Column) == -1)
{
_columns.Delete(Column);
}
else
{
++i;
}
}
}
}
public void GroupBy(string groupColumnNames, string aggregateColumnNames = null)
{
List <ValueTableColumn> GroupColumns = GetProcessingColumnList(groupColumnNames, true);
List <ValueTableColumn> AggregateColumns = GetProcessingColumnList(aggregateColumnNames, true);
foreach (ValueTableColumn group_column in GroupColumns)
{
if (AggregateColumns.Find(x => x.Name == group_column.Name) != null)
{
throw ColumnsMixedException(group_column.Name);
}
}
var uniqueRows = new Dictionary <ValueTableRow, ValueTableRow>(new RowsByColumnsEqComparer(GroupColumns));
int new_idx = 0;
foreach (ValueTableRow row in _rows)
{
if (uniqueRows.ContainsKey(row))
{
ValueTableRow old_row = uniqueRows[row];
foreach (var Column in AggregateColumns)
{
IValue current = row.Get(Column);
if (current.DataType == DataType.Number)
{
decimal sum = old_row.Get(Column).AsNumber() + current.AsNumber();
old_row.Set(Column, ValueFactory.Create(sum));
}
}
}
else
{
ValueTableRow new_row = _rows[new_idx++];
foreach (var Column in GroupColumns)
{
new_row.Set(Column, row.Get(Column));
}
foreach (var Column in AggregateColumns)
{
if (row.Get(Column).DataType != DataType.Number)
{
new_row.Set(Column, ValueFactory.Create(0));
}
else
{
new_row.Set(Column, row.Get(Column));
}
}
uniqueRows.Add(new_row, new_row);
}
}
_rows.RemoveRange(new_idx, _rows.Count() - new_idx);
int i = 0;
while (i < _columns.Count())
{
ValueTableColumn Column = _columns.FindColumnByIndex(i);
if (GroupColumns.IndexOf(Column) == -1 && AggregateColumns.IndexOf(Column) == -1)
{
_columns.Delete(Column);
}
else
{
++i;
}
}
}
