Examples of java.util.prefs.Preferences.removeNode()

java.util.prefs.Preferences.removeNode()
Removes this preference node and all of its descendants, invalidating any preferences contained in the removed nodes. Once a node has been removed, attempting any method other than {@link #name()}, {@link #absolutePath()}, {@link #isUserNode()}, {@link #flush()} or{@link #node(String) nodeExists("")} on the correspondingPreferences instance will fail with an IllegalStateException. (The methods defined on {@link Object}can still be invoked on a node after it has been removed; they will not throw IllegalStateException.)
The removal is not guaranteed to be persistent until the flush method is called on this node (or an ancestor).
If this implementation supports stored defaults, removing a node exposes any stored defaults at or below this node. Thus, a subsequent call to nodeExists on this node's path name may return true, and a subsequent call to node on this path name may return a (different) Preferences instance representing a non-empty collection of preferences and/or children. @throws BackingStoreException if this operation cannot be completeddue to a failure in the backing store, or inability to communicate with it. @throws IllegalStateException if this node (or an ancestor) has alreadybeen removed with the {@link #removeNode()} method. @throws UnsupportedOperationException if this method is invoked on the root node. @see #flush()


        // now that all the arguments were processed, let's load in our config (this allows the -p to come after -c)
        if (clean_config) {
            Preferences prefsNode = getPreferencesNode();
            if (clean_token) {
                prefsNode.removeNode();
            } else {
                // remove everything EXCEPT the security token
                String[] prefKeys = prefsNode.keys();
                if (prefKeys != null && prefKeys.length > 0) {
                    for (String prefKey : prefKeys) {

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   public static final void cleanAgent()
   throws Exception
   {
      Preferences node = getNode( "rhq-agent" );
      node.removeNode();
      node.flush();
   }


   public static final void cleanServer()
   throws Exception

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   public static final void cleanServer()
   throws Exception
   {
      Preferences node = getNode( "rhq-server" );
      node.removeNode();
      node.flush();
   }


   public static final Preferences getNode( String name )
   {

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  private void removeNode(Preferences prefs, String property) {
    if (prefs != null) {
      try {
        if (prefs.nodeExists(property)) {
          Preferences node = prefs.node(property);
          node.removeNode();
        }
      } catch (BackingStoreException e) {
        //
      }
    }

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    if ((getPreferences(wikipedia) != null) && (property != null) && (id != null)) {
      Preferences globalNode = getPreferences(wikipedia).node(property);
      try {
        if (globalNode.nodeExists(id)) {
          Preferences node = globalNode.node(id);
          node.removeNode();
        }
      } catch (BackingStoreException e) {
        //
      }
    }

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        {
            if(Preferences.systemRoot().nodeExists(appNodePath))
            {                   
                Preferences node = Preferences.systemRoot().node(appNodePath);
               // log.info("Removing Application preference node "+node.absolutePath());
                node.removeNode();
            }
        }
        catch (BackingStoreException e)
        {
           throw new RegistryException(e.toString(), e);

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            log.error(msg, se);


            // Remove the preferences node.
            try
            {
                preferences.removeNode();
            }
            catch (BackingStoreException bse)
            {
                bse.printStackTrace();
            }

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            }
            // Remove preferences
            Preferences rolePref = Preferences.userRoot().node((String) roles[i]);
            try
            {
                rolePref.removeNode();
            }
            catch (BackingStoreException bse)
            {
                KeyedMessage msg = 
                    SecurityException.UNEXPECTED.create("RoleManager.removeRole",

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            log.error(se.getMessage(), se);


            // Remove the preferences node.
            try
            {
                preferences.removeNode();
            } catch (BackingStoreException bse)
            {
                bse.printStackTrace();
            }
            throw se;

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        atnProviderProxy.removeUserPrincipal(userPrincipal);
        // Remove preferences
        Preferences preferences = Preferences.userRoot().node(fullPath);
        try
        {
            preferences.removeNode();
        } catch (BackingStoreException bse)
        {
            bse.printStackTrace();
        }
    }

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