title: ElasticSearch Java API to query and return single column instead of the whole json document
body: <p>While searching using java api in elaticsearch, I would like to retrieve only one column. 
  Currently when I query using the Java API it returns the whole record like this: <code>[{_id=123-456-7890, name=Wonder Woman, gender=FEMALE}, {_id=777-990-7890, name=Cat Woman, gender=FEMALE}]</code></p>
  
  <p>The record above correctly matches the search condition shown in th . As shown in the code below:</p>
  
  <pre><code>        List&lt;Map&lt;String, Object&gt;&gt; result = new ArrayList&lt;Map&lt;String, Object&gt;&gt;();
  
  
          SearchRequestBuilder srb = client.prepareSearch("heros")
                  .setSearchType(SearchType.DFS_QUERY_THEN_FETCH);
          MatchQueryBuilder mqb;
  
          mqb = QueryBuilders.matchQuery("name", "Woman");
          srb.setQuery(mqb);
          SearchResponse response = srb.execute().actionGet();
          long totalHitCount = response.getHits().getTotalHits();
  
          System.out.println(response.getHits().getTotalHits());
  
          for (SearchHit hit : response.getHits()) {          
              result.add(hit.getSource());
          }
  
          System.out.println(result);
  </code></pre>
  
  <p>I want only one column to be returned. If I search for name I just want the full names back in a list: <code>"Wonder Woman", "Cat Woman"</code> only not the whole json record for each of them. If you think I need to iterate over the <code>result</code> list of maps in java please propose an example of how to do that in this case.</p>