Bug 15844 [Exception Handling] SelectionChange events and NPE
Build 20020508 Due to new global actions there are now more objects listening to selection changes send out by a JFace viewer. We now had the case that one of the listener generated a NPE. As a result all listeners registered after that one didn't receive the selection change event. StructuredViewers should be more fault tolorant to exceptions when informing listeners.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
}
/* (non-Javadoc)
 * Method declared on Viewer.
 */
protected void hookControl(Control control) {
	super.hookControl(control);
	OpenStrategy handler = new OpenStrategy(control);
	handler.addSelectionListener(new SelectionListener() {
		public void widgetSelected(SelectionEvent e) {
			handleSelect(e);
		}
		public void widgetDefaultSelected(SelectionEvent e) {
			handleDoubleSelect(e);
		}
	});
	handler.addPostSelectionListener(new SelectionAdapter() {
		public void widgetSelected(SelectionEvent e) {
			handlePostSelect(e);
		}
	});
	handler.addOpenListener(new IOpenEventListener() {
		public void handleOpen(SelectionEvent e) {
			StructuredViewer.this.handleOpen(e);
		}
	});
}	
/**
 * Returns whether this viewer has any filters.
 */
protected boolean hasFilters() {