320      * @exception IllegalArgumentException if the given provider is null
 321      * or empty.
 322      * @exception IOException if an error occurs during de-serialiazation.
 323      * @exception ClassNotFoundException if an error occurs during
 324      * de-serialiazation.
 325      * @exception NoSuchAlgorithmException if the algorithm to unseal the
 326      * object is not available.
 327      * @exception NoSuchProviderException if the given provider is not
 328      * configured.
 329      * @exception InvalidKeyException if the given key cannot be used to unseal
 330      * the object (e.g., it has the wrong algorithm).
 331      * @exception NullPointerException if <code>key</code> is null.
 332      */
 333     public final Object getObject(Key key, String provider)
 334         throws IOException, ClassNotFoundException, NoSuchAlgorithmException,
 335             NoSuchProviderException, InvalidKeyException
 336     {
 337         if (key == null) {
 338             throw new NullPointerException("key is null");
 339         }
 340         if (provider == null || provider.length() == 0) {
 341             throw new IllegalArgumentException("missing provider");
 342         }
 343 
 344         try {
 345             return unseal(key, provider);
 346         } catch (IllegalBlockSizeException | BadPaddingException ex) {
 347             throw new InvalidKeyException(ex.getMessage());
 348         }
 349     }
 350 
 351 
 352     private Object unseal(Key key, String provider)
 353         throws IOException, ClassNotFoundException, NoSuchAlgorithmException,
 354             NoSuchProviderException, InvalidKeyException,
 355             IllegalBlockSizeException, BadPaddingException
 356     {
 357         /*
 358          * Create the parameter object.
 359          */
 360         AlgorithmParameters params = null;

 320      * @exception IllegalArgumentException if the given provider is null
 321      * or empty.
 322      * @exception IOException if an error occurs during de-serialiazation.
 323      * @exception ClassNotFoundException if an error occurs during
 324      * de-serialiazation.
 325      * @exception NoSuchAlgorithmException if the algorithm to unseal the
 326      * object is not available.
 327      * @exception NoSuchProviderException if the given provider is not
 328      * configured.
 329      * @exception InvalidKeyException if the given key cannot be used to unseal
 330      * the object (e.g., it has the wrong algorithm).
 331      * @exception NullPointerException if <code>key</code> is null.
 332      */
 333     public final Object getObject(Key key, String provider)
 334         throws IOException, ClassNotFoundException, NoSuchAlgorithmException,
 335             NoSuchProviderException, InvalidKeyException
 336     {
 337         if (key == null) {
 338             throw new NullPointerException("key is null");
 339         }
 340         if (provider == null || provider.isEmpty()) {
 341             throw new IllegalArgumentException("missing provider");
 342         }
 343 
 344         try {
 345             return unseal(key, provider);
 346         } catch (IllegalBlockSizeException | BadPaddingException ex) {
 347             throw new InvalidKeyException(ex.getMessage());
 348         }
 349     }
 350 
 351 
 352     private Object unseal(Key key, String provider)
 353         throws IOException, ClassNotFoundException, NoSuchAlgorithmException,
 354             NoSuchProviderException, InvalidKeyException,
 355             IllegalBlockSizeException, BadPaddingException
 356     {
 357         /*
 358          * Create the parameter object.
 359          */
 360         AlgorithmParameters params = null;