public class TestOutlinePage extends ContentOutlinePage {

	private TreeViewer treeViewer;

	public void createControl(Composite parent) {

		PatternFilter filter = new PatternFilter();
		FilteredTree tree = new FilteredTree(parent, SWT.MULTI | SWT.H_SCROLL
				| SWT.V_SCROLL, filter, false);
		treeViewer = tree.getViewer();
		// treeViewr = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);

		treeViewer.addSelectionChangedListener(this);
		treeViewer.setInput(Input);
		... 

	}

	@Override
	protected TreeViewer getTreeViewer() {
		return treeViewer;
	}

	@Override
	public Control getControl() {
		if (treeViewer == null) {
			return null;
		}
		return treeViewer.getControl();
	}

	@Override
	public ISelection getSelection() {
		if (treeViewer == null) {
			return StructuredSelection.EMPTY;
		}
		return treeViewer.getSelection();
	}
    
	@Override
	public void setFocus() {
 		treeViewer.getControl().setFocus();
	}
	
	@Override
	public void setSelection(ISelection selection) {
		if (treeViewer != null) {
			treeViewer.setSelection(selection);
		}
	}
}

!ENTRY org.eclipse.ui 4 0 2009-11-25 08:49:40.661
!MESSAGE Unhandled event loop exception
!STACK 0
java.lang.IllegalArgumentException: Index out of bounds
	at org.eclipse.swt.SWT.error(SWT.java:3865)
	at org.eclipse.swt.SWT.error(SWT.java:3799)
	at org.eclipse.swt.SWT.error(SWT.java:3770)
	at org.eclipse.swt.widgets.Widget.error(Widget.java:619)
	at org.eclipse.swt.widgets.Table.getItem(Table.java:1420)
	at org.eclipse.swt.dnd.DropTargetEffect.getItem(DropTargetEffect.java:107)
	at org.eclipse.swt.dnd.DropTargetEffect.getItem(DropTargetEffect.java:90)
	at org.eclipse.swt.dnd.DropTarget.setEventData(DropTarget.java:873)
	at org.eclipse.swt.dnd.DropTarget.draggingUpdated(DropTarget.java:280)
	at org.eclipse.swt.dnd.DropTarget.dropTargetProc(DropTarget.java:430)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend_bool(Native Method)
	at org.eclipse.swt.internal.cocoa.NSRunLoop.runMode(NSRunLoop.java:42)
	at org.eclipse.swt.widgets.Display.sleep(Display.java:3905)
	at org.eclipse.ui.application.WorkbenchAdvisor.eventLoopIdle(WorkbenchAdvisor.java:364)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2406)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	...

Returns the zero-relative index of the item which is currently at the top of the receiver...

@MappedSuperclass
public abstract class AbstractDV implements Serializable,PropertyChangeListener  {
	private static final long serialVersionUID = 1L;
	
	@Transient
	protected PropertyChangeSupport changeSupport = new PropertyChangeSupport(this); ;

        // constructor
        public AbstractDV() {
       	       changeSupport = new PropertyChangeSupport(this);    	
        }
	
	public void addPropertyChangeListener(String propertyName,
			PropertyChangeListener listener) {
		changeSupport.addPropertyChangeListener(propertyName, listener);
	}

...

}

@Entity
@Table(name="DV")
public class DV extends AbstractDV implements Serializable  {
...
       public DV() {
		super();
	}
...
}
	

public class RTFEditor extends EditorPart {
	public static final String ID = "it.condarelli.rcp.yw.rtfeditor"; 
	private Composite top = null;

	private static int usecount = 0;
	private static ITextDocument doc = null;
	private static IOfficeApplication app = null;
	
	public RTFEditor() {
		super();
		usecount++;
	}

	@Override
	public void dispose() {
		if (doc != null) {
			doc.close();
			doc = null;
		}
		if (usecount > 0) {
			if (--usecount == 0) {
				if (app != null) {
					if (app.isActive())
					try {
						app.deactivate();
					} catch (OfficeApplicationException e) {
						e.printStackTrace();
					}
					app.dispose();
					app = null;
				}
			}
		}
		super.dispose();
	}

	@Override
	public void doSave(IProgressMonitor monitor) {
		if (doc != null) {
			if (doc.isModified()) {
				IPersistenceService ps = doc.getPersistenceService();
				try {
					ps.store();
				} catch (DocumentException e) {
					e.printStackTrace();
				}
			}
		}
	}

	@Override
	public void doSaveAs() {
	}

	@Override
	public void init(IEditorSite site, IEditorInput input)
			throws PartInitException {
		setSite(site);
		setInput(input);
	}

	@Override
	public boolean isDirty() {
		if (doc != null) {
			return doc.isModified();
		}
		return false;
	}

	@Override
	public boolean isSaveAsAllowed() {
		return false;
	}

	@Override
	public void createPartControl(Composite parent) {
		IOfficeApplication a =	EditorCorePlugin.getDefault().getManagedLocalOfficeApplication();
		if(!a.isActive()) {
			app = null;
			Shell shell = parent.getShell();
			IStatus status = NOAUIPlugin.startLocalOfficeApplication(shell, a);
			if (status.getSeverity() != IStatus.ERROR) {
				app = a;
			}
		}
		if (app != null) {
			GridData gridData = new GridData();
			gridData.horizontalAlignment = GridData.FILL;
			gridData.grabExcessHorizontalSpace = true;
			gridData.grabExcessVerticalSpace = true;
			gridData.verticalAlignment = GridData.FILL;
			top = new Composite(parent, SWT.NO_BACKGROUND | SWT.EMBEDDED);
			top.setLayout(new GridLayout());
			Frame frame = SWT_AWT.new_Frame(top);
			try {
				IFrame ifr = app.getDesktopService().constructNewOfficeFrame(frame);
				IEditorInput ei = getEditorInput();
				FileStoreEditorInput fsei = (FileStoreEditorInput) ei.getAdapter(FileStoreEditorInput.class);
				URI uri = fsei.getURI();
				String url = uri.toString();
				try {
					IDocumentService s = app.getDocumentService();
					IDocument d = s.loadDocument(ifr, url);
					if (d instanceof ITextDocument) {
						doc = (ITextDocument) d;
						try {
							URL u = uri.toURL();
							String t = u.getFile();
							int i = t.lastIndexOf('/');
							t = t.substring(i+1);
                                			setPartName(t);
                        			} catch (MalformedURLException e) {}
					}
				} catch (DocumentException e1) {
					e1.printStackTrace();
				} catch (OfficeApplicationException e1) {
					e1.printStackTrace();
				}
			} catch (DesktopException e) {
				e.printStackTrace();
			} catch (OfficeApplicationException e) {
				e.printStackTrace();
			}
		}
	}

	@Override
	public void setFocus() {
		doc.getFrame().setFocus();
	}

}

	String tf = "file:///C:/what/ever/path/to/your/file.rtf";
	try {
		URI uri = new URI(tf);
		try {
			IFileStore fs = EFS.getStore(uri);
			IEditorInput ei = new FileStoreEditorInput(fs);
			IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
			IWorkbenchPage page = window.getActivePage();
			try {
				page.openEditor(ei, RTFEditor.ID);
			} catch (PartInitException e1) {
				e1.printStackTrace();
			}
		} catch (CoreException e2) {
			e2.printStackTrace();
		}
	} catch (URISyntaxException e2) {
		e2.printStackTrace();
	}