[Spark 1.5.2]: Iterate through Dataframe columns and put it in map

[Divya Gehlot]

Hi,

I need to iterate through columns in dataframe based on certain condition
and put it in map .

Dataset
Column1  Column2
Car       Model1
Bike       Model2
Car         Model2
Bike       Model 2

I want to iterate through above dataframe and put it in map where car is
key and model1 and model 2 as values


Thanks,
Regards,
Divya