title: Maps and strings in Drools rules
body: <p>I have following Drools rule to which I send map filled with element , but when it gets executed I have element . Why do I get null when it should be "Y" for the value? When I put breakpoint in ACDebug.debug() method and inspect map after $map.put() was executed it looks good, it has "Y" for the value, but after my rules get executed I have null? Has anyone have similar problem? </p>
  
  <pre><code>import java.util.Map;
  import java.util.HashMap;
  import edu.abc.ACDebug;
  
  rule "POSTPROCESSOR 8"
      ruleflow-group "supress-processor"
      when
          $map:Map(keySet contains "STANDARD_ADDRESS:STREET_NAME")
      then
          ACDebug.debug($map, "Map before PUT: ");
          $map.put("/locationList/sourceAddress/fullStreet",new String("Y"));
          ACDebug.debug($map, "Map after PUT: ");
          $map.remove("STANDARD_ADDRESS:STREET_NAME");
  end
  </code></pre>