Advanced Data Analytics Using Python_ With Machine Learning, Deep Learning and NLP Examples ( 2023)

Chapter 7
Analytics at Scale
Here is the WordCounterBDAS utility class:
import java.util.ArrayList;
import java.util.HashMap;
/**
*
*/
/**
* @author SayanM
*
*/
public final class WordCounterBDAS extends RootBDAS{
@Override
HashMap<String, ArrayList<String>> mapper_task
(String line) {
// TODO Auto-generated method stub
String[] words = line.split(" ");
HashMap<String, ArrayList<String>> result = new
HashMap<String, ArrayList<String>>();
for(String w : words)
{
if(result.containsKey(w))
{
ArrayList<String> vals = result.
get(w);
vals.add("1");
result.put(w, vals);
}
else
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