Bug 292813 [CommonNavigator] Please provide an API for enabling and disabling common navigator filters programmatically
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/532.0 (KHTML, like Gecko) Chrome/3.0.195.27 Safari/532.0 Build Identifier: M20090917-0800 Recently I had a case where I wanted to enable/disable a common navigator filter from code and found it very difficult. I basically ended up using the code in org.eclipse.ui.internal.navigator.filters.UpdateActiveFiltersOperation as a reference and ended up manually creating or pruning an array, as well as adding/removing a corresponding ViewerFilter to/from and refreshing the underlying viewer. This seems quite complicated and I think others could benefit from it being API similar to how API was recently added to enable and disable content contributions (via INavigatorContentService#activateExtensions and INavigatorContentService#deactivateExtensions). Reproducible: Always
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorFilterService.java
}
		} catch (RuntimeException e) {
			NavigatorPlugin.logError(0, e.getMessage(), e);
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.navigator.INavigatorFilterService#persistFilterActivationState()
	 */
	public void persistFilterActivationState() {
		synchronized (activeFilters) {
			/*
			 * by creating a StringBuffer with DELIM, we ensure the string is
			 * not empty when persisted.
			 */
			StringBuffer activatedFiltersPreferenceValue = new StringBuffer(DELIM);
			for (Iterator activeItr = activeFilters.iterator(); activeItr.hasNext();) {
				activatedFiltersPreferenceValue.append(activeItr.next().toString()).append(DELIM);
			}
			IEclipsePreferences prefs = NavigatorContentService.getPreferencesRoot();
			prefs.put(getFilterActivationPreferenceKey(), activatedFiltersPreferenceValue.toString());
			NavigatorContentService.flushPreferences(prefs);
		}
	}
	
	/**
	 * Used for the tests
	 */
	public void resetFilterActivationState() {