[Spark SQL]: Dataset can not map into Dataset in java

[Himasha de Silva]

Hi,

 I'm trying to map a Dataset<Row> that read from csv files into a
Dataset<Integer>.
But it gives some errors. Can anyone please help me to figure it out?

Dataset<Row> t_en_data = session.read().option("header","true")
        .option("inferSchema","true")
        .csv("J:\\csv_path\\T_EN");

Dataset<Integer> mappedDataset = t_en_data
        .map((MapFunction<Row, Integer>) row
->row.<Integer>getAs("Duration"), Encoders.INT());
mappedDataset.show(false);


error - https://gist.github.com/anonymous/614a1746162dd12bb0b810add85deda2

Thanks
-- 

Himasha De Silva