Hi,
I'm trying to count occurrences of a specific token in text and output the total number of that token. I get the nullPointer, even though I excluded the cases of data not present in text. Here's what I have:

Imports: {

  import static gate.Utils.*;

  import java.util.*;

  import java.util.stream.*;

  import java.util.HashMap;

  import java.util.Map;

}

 

Phase: DaysCount

Input: Days

Options: control = once

 

Rule: DCount

{Days}

-->

{

  Map<String, Integer> countByStringMap = new TreeMap<String, Integer>();

  

  for (Annotation annotation : inputAS.get("Days")) {

    if(annotation !=null){

    String string = (String) annotation.getFeatures().get("Days");

    Integer count = (Integer) countByStringMap.get(string);

    if (count == null) {

      countByStringMap.put(string, 1);

    } else {

      countByStringMap.put(string, count + 1);

    }

  }

 

  for (Map.Entry entry : countByStringMap.entrySet()) {

     System.out.println( entry.getKey() + "," + entry.getValue());

  }

   }

}