How to use

getImageID

method

in

javax.media.jai.remote.SerializableRenderedImage

/**
 * Returns the hash table "key" as a <code>Object</code> for this image.
 */
public static Object hashKey(RenderedImage owner) {
  BigInteger imageID = null;
  if (owner instanceof PlanarImage)
    imageID = (BigInteger) ((PlanarImage) owner).getImageID();
  else if (owner instanceof SerializableRenderedImage)
    imageID = (BigInteger) ((SerializableRenderedImage) owner).getImageID();
  if (imageID != null) {
    byte[] buf = imageID.toByteArray();
    return new BigInteger(buf);
  }
  return owner.hashCode();
}