/**
* Rebuilds the view state from the Base64 included String included with the request.
*
* @param stateString the Base64 encoded view state
* @return the view state reconstructed from <code>stateString</code>
*/
protected Object doGetState(String stateString) {
ObjectInputStream ois = null;
InputStream bis = new Base64InputStream(stateString);
try {
if (guard != null) {
byte[] bytes = stateString.getBytes(RIConstants.CHAR_ENCODING);
int numRead = bis.read(bytes, 0, bytes.length);
byte[] decodedBytes = new byte[numRead];
bis.reset();
bis.read(decodedBytes, 0, decodedBytes.length);
bytes = guard.decrypt(decodedBytes);
if (bytes == null) return null;
bis = new ByteArrayInputStream(bytes);
}
if (compressViewState) {
bis = new GZIPInputStream(bis);
}
ois = serialProvider.createObjectInputStream(bis);
long stateTime = 0;
if (stateTimeoutEnabled) {
try {
stateTime = ois.readLong();
} catch (IOException ioe) {
// we've caught an exception trying to read the time
// marker. This most likely means a view that has been
// around before upgrading to the release that included
// this feature. So, no marker, return null now to
// cause a ViewExpiredException
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine(
"Client state timeout is enabled, but unable to find the "
+ "time marker in the serialized state. Assuming state "
+ "to be old and returning null.");
}
return null;
}
}
Object structure = ois.readObject();
Object state = ois.readObject();
if (stateTime != 0 && hasStateExpired(stateTime)) {
// return null if state has expired. This should cause
// a ViewExpiredException to be thrown
return null;
}
return new Object[] {structure, state};
} catch (java.io.OptionalDataException ode) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, ode.getMessage(), ode);
}
throw new FacesException(ode);
} catch (ClassNotFoundException cnfe) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, cnfe.getMessage(), cnfe);
}
throw new FacesException(cnfe);
} catch (IOException iox) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, iox.getMessage(), iox);
}
throw new FacesException(iox);
} finally {
if (ois != null) {
try {
ois.close();
} catch (IOException ioe) {
// ignore
}
}
}
}
