Java Results.getNumberFound方法代码示例

import com.google.appengine.api.search.Results; //导入方法依赖的package包/类
static List<PlaceInfo> getPlaces(GeoPt location, long distanceInMeters, int resultCount) {

    // TODO(user): Use memcache

    String geoPoint = "geopoint(" + location.getLatitude() + ", " + location.getLongitude() + ")";

    String query = "distance(place_location, " + geoPoint + ") < " + distanceInMeters;
    String locExpr = "distance(place_location, " + geoPoint + ")";

    SortExpression sortExpr = SortExpression.newBuilder()
        .setExpression(locExpr)
        .setDirection(SortExpression.SortDirection.ASCENDING)
        .setDefaultValueNumeric(distanceInMeters + 1)
        .build();
    Query searchQuery = Query.newBuilder().setOptions(QueryOptions.newBuilder()
        .setSortOptions(SortOptions.newBuilder().addSortExpression(sortExpr))).build(query);
    Results<ScoredDocument> results = getIndex().search(searchQuery);

    if (results.getNumberFound() == 0) {
      // geo-location doesn't work under dev_server
      if (environment.value() == Development) {
        // return all documents
        results = getIndex().search("value > 0");
      }
    }

    List<PlaceInfo> places = new ArrayList<PlaceInfo>();

    for (ScoredDocument document : results) {
      if (places.size() >= resultCount) {
        break;
      }

      GeoPoint p = document.getOnlyField("place_location").getGeoPoint();

      PlaceInfo place = new PlaceInfo();
      place.setplaceID(document.getOnlyField("id").getText());
      place.setName(document.getOnlyField("name").getText());
      place.setAddress(document.getOnlyField("address").getText());

      place.setLocation(new GeoPt((float) p.getLatitude(), (float) p.getLongitude()));

      // GeoPoints are not implemented on dev server and latitude and longitude are set to zero
      // But since those are doubles let's play safe
      // and use double comparison with epsilon set to 0.0001
      if (Math.abs(p.getLatitude()) <= 0.0001 && Math.abs(p.getLongitude()) <= 0.0001) {
        // set a fake distance of 5+ km
        place.setDistanceInKilometers(5 + places.size());
      } else {
        double distance = distanceInMeters / 1000;
        try {
          distance = getDistanceInKm(
              p.getLatitude(), p.getLongitude(), location.getLatitude(), location.getLongitude());
        } catch (Exception e) {
          log.warning("Exception when calculating a distance: " + e.getMessage());
        }

        place.setDistanceInKilometers(distance);
      }

      places.add(place);
    }

    return places;
  }
 

import com.google.appengine.api.search.Results; //导入方法依赖的package包/类
@Override
public long getMatchingRecordCount() {
    Results<ScoredDocument> results = results();
    return results.getNumberFound();
}