Bug 79957 [Viewers] NPE changing input usingTableViewer and virtual
I'm using the latest code for Table viewer with a private virtual manager class in table viewer. i've straight forward code ... <code> Table table=new Table(shell,SWT.VIRTUAL); TableViewer tv=new TableViewer(table); tv.setContentProvider(new NetworkContentProvider()); tv.setLabelProvider(new NetworkLabelProvider()); tv.setInput(model); . . . in a selection event handler for a button, i've to reset the model input . . tv.setInput(model1); . . Same code works fine without the SWT.VIRTUAL style bit,but when VIRTUAL is set it throws a null pointer exception... the stack trace was java.lang.NullPointerException at org.eclipse.jface.viewers.TableViewer$1.handleEvent(TableViewer.java:103) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:820) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:805) at org.eclipse.swt.widgets.Table.wmNotifyChild(Table.java:3158) at org.eclipse.swt.widgets.Control.WM_NOTIFY(Control.java:4040) at org.eclipse.swt.widgets.Composite.WM_NOTIFY(Composite.java:722) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3025) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1400) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3349) at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:1403) at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:137) at org.eclipse.swt.widgets.Control.windowProc(Control.java:3056) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3349) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1479) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2440) at jface.viewers.TestJfaceVirtual.main(TestJfaceVirtual.java:49)
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TableViewer.java
* Creates a table viewer on the given table control. The viewer has no
	 * input, no content provider, a default label provider, no sorter, and no
	 * filters.
	 * 
	 * @param table
	 *            the table control
	 */
	public TableViewer(Table table) {
		this.table = table;
		hookControl(table);
		tableEditor = new TableEditor(table);
		initTableViewerImpl();
		initializeVirtualManager(table.getStyle());
	}
	
	/**
	 * Initialize the virtual manager to manage the virtual state
	 * if the table is VIRTUAL. If not use the default no-op
	 * version.
	 * @param style
	 */
	private void initializeVirtualManager(int style) {
		if((style & SWT.VIRTUAL) == 0)
			return;
			
		virtualManager = new VirtualManager();	
	}
	/**
	 * Adds the given elements to this table viewer. If this viewer does not
	 * have a sorter, the elements are added at the end in the order given;