How to use

union

method

in

org.n52.sos.util.CollectionHelper

@SuppressWarnings("unchecked")
@Override
public Set<EncoderKey> getEncoderKeyType() {
  return Collections.unmodifiableSet(CollectionHelper.union(ENCODER_KEY_TYPES, super.getEncoderKeyType()));
}

@SuppressWarnings("unchecked")
private static Set<EncoderKey> createEncoderKeys() {
  return CollectionHelper.union(getDefaultEncoderKeys(), CodingHelper.encoderKeysForElements(
      WaterMLConstants.NS_WML_20_DR, GetObservationResponse.class, OmObservation.class,
      AbstractFeature.class, SingleObservationValue.class, MultiObservationValues.class));
}

@SuppressWarnings("unchecked")
private static Set<EncoderKey> createEncoderKeys() {
  return CollectionHelper.union(getDefaultEncoderKeys(),
      CodingHelper.encoderKeysForElements(WaterMLConstants.NS_WML_20, GetObservationResponse.class,
          OmObservation.class, SingleObservationValue.class, MultiObservationValues.class));
}