This section is direct extraction from Bekwam Blog

Here we will assign the value of primary columns to a HashMap object called fieldname.

Input file is the same input file from tFileList

tJaveRow has the code to assign values.

The code is as follows

java.util.Map<String, String> fieldMap = (java.util.Map<String, String>)globalMap.get("fieldMap");

for( Field f : row10.getClass().getFields() ) {

fieldMap.put((String) f.get(row10), f.getName());

}

Next is Load data 

Dynamic Schema Main          Create Column Mapping        Unpivot          Manage Order