public GroupBy(DataMap dataMap, IList <string> groupingColumnNames, IList <string> selectColumnNames = null)
{
_dataMap = dataMap;
_groupingColumnNames = groupingColumnNames;
_selectColumnNames = selectColumnNames;
_groupingColumns = new List <GroupingColumn>();
_maxRowCount = dataMap.MaxRowCount;
_cache = new Dictionary <CacheKey, DataMap>();
foreach (var c in groupingColumnNames)
{
var keyColumn = new GroupingColumn(c, dataMap[c].Unique().UnderlyingList);
_groupingColumns.Add(keyColumn);
foreach (var categoryValue in keyColumn.CategoryValues)
{
var filter = new bool[_maxRowCount];
var data = dataMap[keyColumn.Name].UnderlyingList;
bool exists = false;
for (var i = 0; i < data.Count; ++i)
{
if (data[i].Equals(categoryValue))
{
filter[i] = true;
exists = true;
}
}
if (exists)
{
keyColumn.FilterSet.Add(categoryValue, filter);
}
}
}
}
internal string GetGroupingColumnName()
{
return(GroupingColumn.GetPropertyName());
}
