public Pivoter(PivotReport pivotReport, ResultSet plainResultSet)
{
_plainResultSet = plainResultSet;
_normalColumns = new List <ColumnInfo>();
_pivotColumns = new List <ColumnInfo>();
IList <ReportColumn> groupByColumns = pivotReport.GroupByColumns;
IList <ReportColumn> crosstabColumns = pivotReport.CrossTabHeaders;
foreach (ReportColumn reportColumn in pivotReport.Columns)
{
_normalColumns.Add(plainResultSet.GetColumnInfo(reportColumn));
}
foreach (ReportColumn reportColumn in pivotReport.CrossTabValues)
{
_pivotColumns.Add(plainResultSet.GetColumnInfo(reportColumn));
}
Dictionary <RowKey, Dictionary <RowKey, int> > rowsById
= new Dictionary <RowKey, Dictionary <RowKey, int> >();
ICollection <RowKey> pivotNameSet = new HashSet <RowKey>();
for (int i = 0; i < plainResultSet.RowCount; i++)
{
RowKey unqualifiedGroupByKey = new RowKey();
foreach (var reportColumn in groupByColumns)
{
unqualifiedGroupByKey.Add(plainResultSet.GetValue(i, reportColumn));
}
RowKey crossTabKey = new RowKey();
foreach (var reportColumn in crosstabColumns)
{
crossTabKey.Add(plainResultSet.GetValue(i, reportColumn));
}
// Add the data from the row into the spot for the GroupByKey and CrossTabKey.
// In case that spot is already taken, an integer is appended to the GroupByKey
// until a vacant spot to hold the data is found.
Dictionary <RowKey, int> pivotNameDict;
for (int iQualifier = 0; ; iQualifier++)
{
var qualifiedGroupByKey = new RowKey();
qualifiedGroupByKey.AddRange(unqualifiedGroupByKey);
qualifiedGroupByKey.Add(iQualifier);
if (!rowsById.TryGetValue(qualifiedGroupByKey, out pivotNameDict))
{
pivotNameDict = new Dictionary <RowKey, int>();
rowsById.Add(qualifiedGroupByKey, pivotNameDict);
}
if (!pivotNameDict.ContainsKey(crossTabKey))
{
break;
}
}
pivotNameDict.Add(crossTabKey, i);
pivotNameSet.Add(crossTabKey);
}
_pivotNames = new List <RowKey>(pivotNameSet);
_pivotNames.Sort();
List <Object[]> rows = new List <object[]>();
foreach (Dictionary <RowKey, int> dict in rowsById.Values)
{
rows.Add(PivotRow(dict));
}
_pivotedResultSet = new ResultSet(GetPivotedColumnInfos(), rows);
}