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/*
* Copyright © 2010 Mike Beattie <mike@ethernal.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
package org.altusmetrum.altoslib_10;
import java.io.*;
import java.util.*;
import java.text.*;
public abstract class AltosPreferencesBackend {
public abstract String getString(String key, String def);
public abstract void putString(String key, String value);
public abstract int getInt(String key, int def);
public abstract void putInt(String key, int value);
public abstract double getDouble(String key, double def);
public abstract void putDouble(String key, double value);
public abstract boolean getBoolean(String key, boolean def);
public abstract void putBoolean(String key, boolean value);
public abstract byte[] getBytes(String key, byte[] def);
public abstract void putBytes(String key, byte[] value);
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);
}
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