public override void InitializeNextPass(IRow row, RoleMappedSchema schema)
{
Contracts.Assert(PassNum < 1);
Contracts.AssertValue(schema.Label);
Contracts.AssertValue(schema.Group);
var score = schema.GetUniqueColumn(MetadataUtils.Const.ScoreValueKind.Score);
_labelGetter = RowCursorUtils.GetLabelGetter(row, schema.Label.Index);
_scoreGetter = row.GetGetter <Single>(score.Index);
_newGroupDel = RowCursorUtils.GetIsNewGroupDelegate(row, schema.Group.Index);
if (schema.Weight != null)
{
_weightGetter = row.GetGetter <Single>(schema.Weight.Index);
}
if (UnweightedCounters.GroupSummary)
{
ValueGetter <StringBuilder> groupIdBuilder = RowCursorUtils.GetGetterAsStringBuilder(row, schema.Group.Index);
_groupSbUpdate = () => groupIdBuilder(ref _groupSb);
}
else
{
_groupSbUpdate = () => { }
};
}