dyanmodb-geo-filtering

// The GeoQueryRequest will contain the inputted QueryRequest (decorated with geo-hash/etc)
// as well as a QueryResultGeoFilter to post process the results
GeoQueryRequst geoQueryRequest = geo.radiusQuery(QueryRequest request, double latitude, double longitude, double radius, Config config);
QueryRequest queryRequest = geoQueryRequest.queryRequest;

// clients will use GeoQueryRequest in a manner similar to the following
List<Map<String, AttributeValue>> resultItems = new ArrayList<Map<String, AttributeValue>>((limit < 1000 ? limit : 1000));
do {
    try {
        queryResult = ddb.query(queryRequest);
    } catch (ResourceNotFoundException rnfe) {
        // queryRequest not found, simply break
        break;
    }
    List<Map<String, AttributeValue>> items = queryResult.getItems();
    
    // filter the results using the geo filter
    List<Map<String, AttributeValue>> filteredItems = geoQueryRequest.queryResultGeoFilter.filter(items);
    
    resultItems.addAll(filteredItems);
    queryRequest = queryRequest.withExclusiveStartKey(queryResult.getLastEvaluatedKey());
} while ((queryResult.getLastEvaluatedKey() != null) && (resultItems.size() < limit));