cdm/src/main/java/ucar/nc2/ft/point/StationTimeSeriesCollectionImpl.java
protected StationHelper getStationHelper() {
    if (stationHelper == null) {
      synchronized (this) {
        if (stationHelper == null) {
          try {
            stationHelper = createStationHelper();
          } catch (IOException e) {
            // The methods that will call getStationHelper() aren't declared to throw IOException, so we must
            // wrap it in an unchecked exception.
            throw new RuntimeException(e);
          }
        }
      }
    }

    assert stationHelper != null : "stationHelper is null for StationTimeSeriesCollectionImpl"+getName();
    return stationHelper;
  }
protected StationHelper getStationHelper() {
    if (stationHelper == null) {
      synchronized (this) {
        if (stationHelper == null) {
          try {
            stationHelper = createStationHelper();
          } catch (IOException e) {
            // The methods that will call getStationHelper() aren't declared to throw IOException, so we must
            // wrap it in an unchecked exception.
            throw new RuntimeException(e);
          }
        }
      }
    }

    assert stationHelper != null : "stationHelper is null for StationTimeSeriesCollectionImpl"+getName();
    return stationHelper;
  }
protected StationHelper getStationHelper ( ) { if ( stationHelper == null ) { synchronized ( this ) { if ( stationHelper == null ) { try { stationHelper = createStationHelper ( ) ; } catch ( IOException e ) { // The methods that will call getStationHelper() aren't declared to throw IOException, so we must // wrap it in an unchecked exception. throw new RuntimeException ( e ) ; } } } } assert stationHelper != null : "stationHelper is null for StationTimeSeriesCollectionImpl" + getName ( ) ; return stationHelper ; }
Double-check idiom for lazy initialization of instance fields. See Effective Java 2nd Ed, p. 283.
Double - check idiom for lazy initialization of instance fields . See Effective Java 2nd Ed p . 283 .