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MapForward.java
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MapForward.java
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package protein;
import java.util.ArrayList;
import java.util.List;
import org.apache.spark.api.java.function.PairFlatMapFunction;
import scala.Tuple2;
public class MapForward implements PairFlatMapFunction<Tuple2<String, String>, String, String> {
public java.util.Iterator<Tuple2<String,String>> call(Tuple2 <String, String> line){
String nodeMadre = line._1.split(" ")[0];
String root = line._1.split(" ")[1];
String[] vicini = line._2.split(" ")[0].split(",");
String color = line._2.split(" ")[2];
Integer distance = Integer.parseInt(line._2.split(" ")[1]);
String path = line._2.split(" ")[3];
List<Tuple2<String, String>> result = new ArrayList<Tuple2<String, String>>();
if (color.equalsIgnoreCase("GRAY")) {
for(int i=0; i<vicini.length; i++) {
if(!path.startsWith(vicini[i]))
result.add(new Tuple2<String, String> (vicini[i] +" "+ root, "null" +" "+ (distance+1) +" "+ "GRAY" +" "+ nodeMadre +","+ path));
}
result.add(new Tuple2<String, String> (nodeMadre +" "+ root, line._2.split(" ")[0] +" "+ distance +" "+ "BLACK" +" "+ path));
}else result.add(line);
return result.iterator();
}
}