Sample Java GeoQuery

samplegeoquery.java

import com.mongodb.*;

/**
 * Created by tgrall on 8/27/14.
 */
public class TestApp {


    public static void main(String[] args) throws Exception {


        MongoClient client = new MongoClient();
        DB db = client.getDB( "geo" );
        DBCollection collection = db.getCollection("states");
        DBCollection airports = db.getCollection("airports");



        // find the "geojson" polygon of the California state
        DBObject query = QueryBuilder.start()
                                     .put("code").is("CA")
                                     .get();
        DBObject state = collection.findOne(query);

        DBObject polygon = (DBObject)state.get("loc");
        //System.out.println(polygon);

        // Find all the airports that intersect with this
        // use a direct DBObject since the Query Builder does not suppor to Geospatial feature yet
        // see https://jira.mongodb.org/browse/JAVA-1195
        DBObject geometryClause = BasicDBObjectBuilder.start()
                                                      .add("$geometry", polygon)
                                                      .get();
        DBObject geoQuery = BasicDBObjectBuilder.start()
                                        .push("loc")
                                        .add( "$geoIntersects", geometryClause )
                                        .get();

        Cursor cursor = airports.find( geoQuery );


        while( cursor.hasNext() ){
            DBObject airport = cursor.next();
            System.out.println( airport.get("code") +" "+ airport.get("name")  );
        }



    }

}