Class FileBasedPreferences

public class FileBasedPreferences
extends AbstractPreferences

This is a simple file-based preference implementation which writes the preferences as properties files. A node is represented as a directory beneath the user's home directory. The preferences for the node are stored in a single properties file in that directory. Sub-nodes are stored in subdirectories. This implementation uses file locking to mediate access to the properties files.

Field Summary

Fields inherited from class java.util.prefs.AbstractPreferences

lock, newNode

Fields inherited from class java.util.prefs.Preferences


Method Summary

protected AbstractPreferences
childSpi(String name)
protected String[]
protected void
protected String
getSpi(String key)
Returns true if this node comes from the user preferences tree, false if it comes from the system preferences tree.
protected String[]
protected void
putSpi(String key, String value)
protected void
protected void
removeSpi(String key)
protected void

Methods inherited from class java.util.prefs.AbstractPreferences

absolutePath, addNodeChangeListener, addPreferenceChangeListener, cachedChildren, childSpi, childrenNames, childrenNamesSpi, clear, exportNode, exportSubtree, flush, flushSpi, get, getBoolean, getByteArray, getChild, getDouble, getFloat, getInt, getLong, getSpi, isRemoved, isUserNode, keys, keysSpi, name, node, nodeExists, parent, put, putBoolean, putByteArray, putDouble, putFloat, putInt, putLong, putSpi, remove, removeNode, removeNodeChangeListener, removeNodeSpi, removePreferenceChangeListener, removeSpi, sync, syncSpi, toString

Methods inherited from class java.util.prefs.Preferences

absolutePath, addNodeChangeListener, addPreferenceChangeListener, childrenNames, clear, exportNode, exportSubtree, flush, get, getBoolean, getByteArray, getDouble, getFloat, getInt, getLong, importPreferences, isUserNode, keys, name, node, nodeExists, parent, put, putBoolean, putByteArray, putDouble, putFloat, putInt, putLong, remove, removeNode, removeNodeChangeListener, removePreferenceChangeListener, sync, systemNodeForPackage, systemRoot, toString, userNodeForPackage, userRoot

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details


protected AbstractPreferences childSpi(String name)
childSpi in interface AbstractPreferences


protected String[] childrenNamesSpi()
            throws BackingStoreException
childrenNamesSpi in interface AbstractPreferences


protected void flushSpi()
            throws BackingStoreException
flushSpi in interface AbstractPreferences


protected String getSpi(String key)
getSpi in interface AbstractPreferences


public boolean isUserNode()
Returns true if this node comes from the user preferences tree, false if it comes from the system preferences tree.
isUserNode in interface AbstractPreferences


protected String[] keysSpi()
            throws BackingStoreException
keysSpi in interface AbstractPreferences


protected void putSpi(String key,
                      String value)
putSpi in interface AbstractPreferences


protected void removeNodeSpi()
            throws BackingStoreException
removeNodeSpi in interface AbstractPreferences


protected void removeSpi(String key)
removeSpi in interface AbstractPreferences


protected void syncSpi()
            throws BackingStoreException
syncSpi in interface AbstractPreferences -- File-based preference implementation Copyright (C) 2006 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath 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; either version 2, or (at your option) any later version. GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.