org.das2.system
Class NullPreferences

java.lang.Object
  java.util.prefs.Preferences
      java.util.prefs.AbstractPreferences
          org.das2.system.NullPreferences

public class NullPreferences
extends java.util.prefs.AbstractPreferences

NullPreferences object for allowing applications to work in applet environment. Changes that would have been stored are simply ignored.

Field Summary

Fields inherited from class java.util.prefs.AbstractPreferences

lock, newNode

Fields inherited from class java.util.prefs.Preferences

MAX_KEY_LENGTH, MAX_NAME_LENGTH, MAX_VALUE_LENGTH

Constructor Summary

NullPreferences()

Method Summary

protected java.lang.String[]	childrenNamesSpi()
protected java.util.prefs.AbstractPreferences	childSpi(java.lang.String name)
protected void	flushSpi()
protected java.lang.String	getSpi(java.lang.String key)
protected java.lang.String[]	keysSpi()
protected void	putSpi(java.lang.String key, java.lang.String value)
protected void	removeNodeSpi()
protected void	removeSpi(java.lang.String key)
protected void	syncSpi()

Methods inherited from class java.util.prefs.AbstractPreferences

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

Methods inherited from class java.util.prefs.Preferences

importPreferences, systemNodeForPackage, systemRoot, userNodeForPackage, userRoot

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NullPreferences

public NullPreferences()

Method Detail

putSpi

protected void putSpi(java.lang.String key,
                      java.lang.String value)

Specified by:

putSpi in class java.util.prefs.AbstractPreferences

getSpi

protected java.lang.String getSpi(java.lang.String key)

Specified by:

getSpi in class java.util.prefs.AbstractPreferences

removeSpi

protected void removeSpi(java.lang.String key)

Specified by:

removeSpi in class java.util.prefs.AbstractPreferences

removeNodeSpi

protected void removeNodeSpi()
                      throws java.util.prefs.BackingStoreException

Specified by:

removeNodeSpi in class java.util.prefs.AbstractPreferences

Throws:

java.util.prefs.BackingStoreException

keysSpi

protected java.lang.String[] keysSpi()
                              throws java.util.prefs.BackingStoreException

Specified by:

keysSpi in class java.util.prefs.AbstractPreferences

Throws:

java.util.prefs.BackingStoreException

childrenNamesSpi

protected java.lang.String[] childrenNamesSpi()
                                       throws java.util.prefs.BackingStoreException

Specified by:

childrenNamesSpi in class java.util.prefs.AbstractPreferences

Throws:

java.util.prefs.BackingStoreException

childSpi

protected java.util.prefs.AbstractPreferences childSpi(java.lang.String name)

Specified by:

childSpi in class java.util.prefs.AbstractPreferences

syncSpi

protected void syncSpi()
                throws java.util.prefs.BackingStoreException

Specified by:

syncSpi in class java.util.prefs.AbstractPreferences

Throws:

java.util.prefs.BackingStoreException

flushSpi

protected void flushSpi()
                 throws java.util.prefs.BackingStoreException

Specified by:

flushSpi in class java.util.prefs.AbstractPreferences

Throws:

java.util.prefs.BackingStoreException