package org.apidesign.demo.anagramwithspringandlookup.simplescrambler;

 import java.util.Random;

 import org.apidesign.demo.anagramwithspringandlookup.Scrambler;

 import org.openide.util.lookup.ServiceProvider;

 @ServiceProvider(service=Scrambler.class)

 public class SimpleScrambler implements Scrambler {

     private static final Random random = new Random();

     public String scramble(String word) {

         for (;;) {

             int index1 = random.nextInt(word.length());

             int index2 = random.nextInt(word.length());

             if (index1 == index2) {

                 continue;

             }

             char char1 = word.charAt(index1);

             char char2 = word.charAt(index2);

             StringBuilder sb = new StringBuilder(word);

             sb.setCharAt(index1, char2);

             sb.setCharAt(index2, char1);

             return sb.toString();

         }

     }

 }