internal override List <RawRecord> CrossApply(RawRecord record)
{
List <RawRecord> results = new List <RawRecord>();
FieldObject unfoldTarget = getUnfoldTargetFunc.Evaluate(record);
if (unfoldTarget is PathField)
{
PathField path = (PathField)unfoldTarget;
foreach (PathStepField pathStep in path.Path.Cast <PathStepField>())
{
if (pathStep == null)
{
continue;
}
RawRecord flatRecord = new RawRecord();
Compose1Field compose1StepField = pathStep.StepFieldObject as Compose1Field;
Debug.Assert(compose1StepField != null, "compose1StepField != null");
//
// Extract only needed columns from Compose1Field
//
foreach (string unfoldColumn in populateColumns)
{
flatRecord.Append(compose1StepField[unfoldColumn]);
}
results.Add(flatRecord);
}
}
else if (unfoldTarget is CollectionField)
{
CollectionField inputCollection = (CollectionField)unfoldTarget;
foreach (FieldObject singleObj in inputCollection.Collection)
{
if (singleObj == null)
{
continue;
}
RawRecord flatRecord = new RawRecord();
Compose1Field compose1ObjField = singleObj as Compose1Field;
Debug.Assert(compose1ObjField != null, "compose1ObjField != null");
//
// Extract only needed columns from Compose1Field
//
foreach (string unfoldColumn in populateColumns)
{
flatRecord.Append(compose1ObjField[unfoldColumn]);
}
results.Add(flatRecord);
}
}
else if (unfoldTarget is MapField)
{
MapField inputMap = (MapField)unfoldTarget;
foreach (EntryField entry in inputMap)
{
RawRecord entryRecord = new RawRecord();
foreach (string columnName in this.populateColumns)
{
entryRecord.Append(columnName.Equals(GraphViewKeywords.KW_TABLE_DEFAULT_COLUMN_NAME)
? entry
: (FieldObject)null);
}
results.Add(entryRecord);
}
}
else
{
RawRecord flatRecord = unfoldTarget.FlatToRawRecord(this.populateColumns);
results.Add(flatRecord);
}
return(results);
}
