Removing unwanted preference pages from eclipse

To remove unwanted preferences from your eclipse rcp app, we can do the following.

As part of your App MyRCPWorkbenchAdvisor#postStartup() method, you need to invoke the following code with the preference page id.

private void removeUnwantedPreferences()

{

PreferenceManager pm = PlatformUI.getWorkbench().getPreferenceManager();

IPreferenceNode root = getRoot(pm);

if (root != null)

{

removePrefsPage(root, "com.windows.preference.mypage.id"); 

}

}

//Identify preference node

private IPreferenceNode getRoot(PreferenceManager pm)

{

try

{

Method m = PreferenceManager.class.getDeclaredMethod("getRoot", (Class[]) null); 

m.setAccessible(true);

return (IPreferenceNode) m.invoke(pm);

}

catch (Exception e)

{

IdeLog.logWarning(TitaniumCorePlugin.getDefault(), e);

}

return null;

}

//remove preference id from the preference node

private void removePrefsPage(IPreferenceNode root, String id)

{

for (IPreferenceNode node : root.getSubNodes())

{

if (node.getId().equals(id))

{

root.remove(node);

}

else

{

removePrefsPage(node, id);

}

}

}

This seems to be work without any issues.

However, I could see other direct approach but that doesn't seem to work well in all scenarios.

PreferenceManager pm = PlatformUI.getWorkbench().getPreferenceManager();

pm.remove("com.windows.preference.mypage.id");