an attemp to make range search work using lucene syntax

MappingRangeTest.java

import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
import static org.elasticsearch.node.NodeBuilder.nodeBuilder;

import org.elasticsearch.client.Client;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.node.Node;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;


public class MappingRangeTest {
    
    public static void main(String[] args) throws Exception {
        Node node = nodeBuilder().node();
        Client client = node.client();
        
        client.admin().indices().prepareCreate("aa")
          .addMapping("news", 
            jsonBuilder()
            .startObject()
             .startObject("properties") 
              .startObject("dd")
               .field("type","long")
               .field("store","yes")
              .endObject()
              .startObject("title")
               .field("type","string")
               .field("store","yes")
              .endObject()
             .endObject()
            .endObject())
          .execute().actionGet();
        
        try {
            client.prepareIndex("aa", "news", "1").setSource(
                    jsonBuilder()
                     .startObject()
                      .field("dd",20)
                      .field("title","news 1")
                     .endObject()).execute().actionGet();
            
            client.prepareIndex("aa", "news", "2").setSource(
                    jsonBuilder()
                     .startObject()
                      .field("dd",30)
                      .field("title","news 2")
                     .endObject()).execute().actionGet();
            
            Thread.sleep(1000);
            
            System.out.println("mapping: "+
            client.admin().cluster().prepareState().execute().actionGet()
              .state().metaData().index("aa").mapping("news").source());
            
            SearchHits hits = client.prepareSearch()
              .setQuery(QueryBuilders.queryString("+dd:[10 to 40]"))
              .setIndices("aa")
              .execute().actionGet().getHits();
            
            for(SearchHit h : hits) {
                System.out.println(h.getSource());
            }
        }
        finally {
            client.admin().indices().prepareDelete("aa").execute().actionGet();
            node.close();
        }
    }
    
}