Time for action – counting frequent words by coding in Java

In this section, we will redo the transformation from the Time for action – counting frequent words by coding in JavaScript section, but this time we will code in Java rather than in JavaScript.

1. Open the transformation from the Time for action – counting frequent words by coding in JavaScript section of this chapter and save it as a new transformation.
2. Delete the JavaScript step and in its place, add a User Defined Java Class step. You will find it under the Scripting category of steps. You will have the following:
   
3. Double-click on the User Defined Java Class step—UDJC from now on—and in the Processor tab, type the following:

   public boolean processRow(StepMetaInterface smi,StepDataInterface sdi) throws KettleException
   {
      Object[] r = getRow();
      if (r == null) {
         setOutputDone();
         return false;
      }
   
      if (first)
      {
         first = false;
      }
   
      r = createOutputRow(r, data.outputRowMeta...