processCSV.java

public List[Match] process(String csv) throws CSVMatchConstraintException{
	List[String] rows = toRows(csv);
	validator.validate(rows) //in case of invalid it will throw an exeption	
	return rows.stream()
		   .map(row => new Match(row(0), row(1), row(2), row(3)))
		   .collect(toList())
	}
}