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Eclipse Platform
Release 3.5

Class PreferenceModifyListener

  extended by 

public abstract class PreferenceModifyListener
extends Object

This class provides a hook into the preference service before particular operations on the global preference tree. Preference modify listeners are registered with the preference service via XML and the org.eclipse.core.runtime.preferences extension point.

Clients may subclass this type.


Constructor Summary
PreferenceModifyListener ()
Method Summary
  IEclipsePreferences preApply ( IEclipsePreferences node)
          Clients are given the opportunity to modify the given tree before it is applied to the global preference tree.
Methods inherited from class java.lang. Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail


public PreferenceModifyListener()
Method Detail


IEclipsePreferences preApply(
IEclipsePreferences node)
Clients are given the opportunity to modify the given tree before it is applied to the global preference tree. Clients should return the tree which should be applied globally. The tree passed in will not be null and clients must not return a null tree.

This method is called by the preference service from within calls to IPreferencesService.applyPreferences(IExportedPreferences) or IPreferencesService.applyPreferences(IEclipsePreferences, IPreferenceFilter[]).

A typical action for clients to perform would be to intercept the incoming preference tree, migrate old preference values to new ones, and then return the new tree.

node - the tree to modify
the tree to apply to the global preferences

Eclipse Platform
Release 3.5

Guidelines for using Eclipse APIs.

Copyright (c) Eclipse contributors and others 2000, 2008. All rights reserved.

  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire