question: public static FileFooter convertFileFooter ( List < BlockletInfoColumnar > infoList , int numCols , int [ ] cardinalities , List < ColumnSchema > columnSchemaList , SegmentProperties segmentProperties ) throws IOException { SegmentInfo segmentInfo = new SegmentInfo ( ) ; segmentInfo . setNum_cols ( columnSchemaList . size ( ) ) ; segmentInfo . setColumn_cardinalities ( CarbonUtil . convertToIntegerList ( cardinalities ) ) ; FileFooter footer = new FileFooter ( ) ; footer . setNum_rows ( getTotalNumberOfRows ( infoList ) ) ; footer . setSegment_info ( segmentInfo ) ; for ( BlockletInfoColumnar info : infoList ) { footer . addToBlocklet_index_list ( getBlockletIndex ( info ) ) ; } footer . setTable_columns ( columnSchemaList ) ; for ( BlockletInfoColumnar info : infoList ) { footer . addToBlocklet_info_list ( getBlockletInfo ( info , columnSchemaList , segmentProperties ) ) ; } return footer ; }
target:  It converts list of BlockletInfoColumnar to FileFooter thrift objects