private HierarchicalRowInfo GetNextBestRowInfo(IDataReader reader, List <HierarchicalRowInfo> toRead, CancellationToken token, int index)
{
Contract.Requires(reader != null);
Contract.Requires(toRead != null && Contract.ForAll(toRead, t => t != null));
token.ThrowIfCancellationRequested();
if (index > 0 && !reader.NextResult())
{
if (toRead.Any(f => f.ShouldThrowIfNotFound(toRead)))
{
throw new StoredProcedureResultsException(typeof(T), toRead.Select(f => f.ItemType).ToArray());
}
return(HierarchicalRowInfo.Empty);
}
token.ThrowIfCancellationRequested();
if (resultTypesInOrder != null)
{
if (index >= resultTypesInOrder.Count)
{
return(null);
}
var type = resultTypesInOrder[index];
return(toRead.First(f => f.ItemType == type));
}
HierarchicalRowInfo result = null;
var colNames = Enumerable.Range(0, reader.FieldCount).Select(i => reader.GetName(i)).ToArray();
var fewestRemaining = Int32.MaxValue;
foreach (var hri in toRead)
{
int i;
if (hri.MatchesColumns(colNames, out i))
{
if (i < fewestRemaining)
{
fewestRemaining = i;
result = hri;
}
}
}
return(result);
}
public HierarchicalRowInfo(
HierarchicalRowInfo parent = null,
Type itemType = null,
string parentKeyColumnName = null,
string itemKeyColumnName = null,
IRowFactory rowFactory = null,
bool isOptional = false,
bool isArray = false)
{
this.parent = parent;
ItemType = itemType;
ParentKeyColumnName = parentKeyColumnName;
ItemKeyColumnName = itemKeyColumnName;
RowFactory = rowFactory;
IsOptional = isOptional;
IsArray = isArray;
}
