+ public Serializable getSerializable(String key, Serializable def) {
+ byte[] bytes = null;
+
+ bytes = getBytes(key, null);
+ if (bytes == null)
+ return def;
+
+ ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
+
+ try {
+ ObjectInputStream ois = new ObjectInputStream(bais);
+ Serializable object = (Serializable) ois.readObject();
+ return object;
+ } catch (IOException ie) {
+ debug("IO exception %s\n", ie.toString());
+ } catch (ClassNotFoundException ce) {
+ debug("ClassNotFoundException %s\n", ce.toString());
+ }
+ return def;
+ }
+
+ public void putSerializable(String key, Serializable object) {
+ ByteArrayOutputStream baos = new ByteArrayOutputStream();
+
+ try {
+ ObjectOutputStream oos = new ObjectOutputStream(baos);
+
+ oos.writeObject(object);
+ byte[] bytes = baos.toByteArray();
+
+ putBytes(key, bytes);
+ } catch (IOException ie) {
+ debug("set_state failed %s\n", ie.toString());
+ }
+ }
+
+ public abstract boolean nodeExists(String key);
+ public abstract AltosPreferencesBackend node(String key);
+
+ public abstract String[] keys();
+ public abstract void remove(String key);
+
+ public abstract void flush();
+
+ public abstract File homeDirectory();
+
+ public abstract void debug(String format, Object ... arguments);