[news.eclipse.newcomer] Launching an editor programmatically

[dave@xxxxxxxxxxxxxxxxxxxxx (Dave Sunerton-Burl)]

I am just starting to write a simple RCP application for administering 
login details held in a database. I have a view listing the logins and I'd 
like to launch a form based editor on double-click of an item in the list. 
The view is working fine. I've set up a double-click listener/action in 
the view - code for the action is....

doubleClickAction = new Action() {
           public void run() {
               ISelection selection = viewer.getSelection();
               ImsUser user = (ImsUser) ((IStructuredSelection) selection)
                       .getFirstElement();
               try {
                   PlatformUI.getWorkbench().getActiveWorkbenchWindow()
                           .getActivePage().openEditor(
                                   new UserEditorInput(user.getUserId()),
                                   TestEditor.ID);
               } catch (PartInitException e) {
                   e.printStackTrace();
               }
           }

I also have an editor (which I've replaced with a test one for now) and an 
IEditorInput (UserEditorInput) which just stores the database ID of the 
record I'm wanting to edit to pass into the editor. Here's the top of the 
TestEditor...


public class TestEditor extends EditorPart {

   public static final String ID = "editors.testEditor";


..and here's the relevant bits from plugin.xml....


<extension
        point="org.eclipse.ui.editors">
     <editor
           class="com.lledrsolutions.btcv.adminconsole.editors.UserEditor"
           
contributorClass="com.lledrsolutions.btcv.adminconsole.editors.UserEditorContributor"
           default="false"
           extensions="*"
           id="com.lledrsolutions.btcv.adminconsole.editors.userEditor"
           name="User Editor"/>
     <editor
           class="com.lledrsolutions.btcv.adminconsole.editors.TestEditor"
           default="false"
           id="editors.testEditor"
           name="Test Editor"/>
  </extension>


So, I've checked all the class names and IDs are correct but I'm getting...

org.eclipse.ui.PartInitException: Unable to open editor, unknown editor 
ID: editors.testEditor

..from the action in my View every time. So, I have two questions;

1. When working with editing database records, is this the right way to go 
(i.e. list/table View for searching records, Editor for editing a single 
record)?

2. If it is the right way to go, then what could be wrong here? I've spent 
a lot of time searching this site for this and generally it's always down 
to IDs being incorrect - I'm sure I've got this right (see above to prove 
me wrong!) so is there any other reason Eclipse wouldn't be able to find 
the Editor?