2 * Copyright © 2010 Mike Beattie <mike@ethernal.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
18 package org.altusmetrum.altoslib_10;
24 public abstract class AltosPreferencesBackend {
26 public abstract String getString(String key, String def);
27 public abstract void putString(String key, String value);
29 public abstract int getInt(String key, int def);
30 public abstract void putInt(String key, int value);
32 public abstract double getDouble(String key, double def);
33 public abstract void putDouble(String key, double value);
35 public abstract boolean getBoolean(String key, boolean def);
36 public abstract void putBoolean(String key, boolean value);
38 public abstract byte[] getBytes(String key, byte[] def);
39 public abstract void putBytes(String key, byte[] value);
41 public Serializable getSerializable(String key, Serializable def) {
44 bytes = getBytes(key, null);
48 ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
51 ObjectInputStream ois = new ObjectInputStream(bais);
52 Serializable object = (Serializable) ois.readObject();
54 } catch (IOException ie) {
55 debug("IO exception %s\n", ie.toString());
56 } catch (ClassNotFoundException ce) {
57 debug("ClassNotFoundException %s\n", ce.toString());
62 public void putSerializable(String key, Serializable object) {
63 ByteArrayOutputStream baos = new ByteArrayOutputStream();
66 ObjectOutputStream oos = new ObjectOutputStream(baos);
68 oos.writeObject(object);
69 byte[] bytes = baos.toByteArray();
72 } catch (IOException ie) {
73 debug("set_state failed %s\n", ie.toString());
77 public abstract boolean nodeExists(String key);
78 public abstract AltosPreferencesBackend node(String key);
80 public abstract String[] keys();
81 public abstract void remove(String key);
83 public abstract void flush();
85 public abstract File homeDirectory();
87 public abstract void debug(String format, Object ... arguments);