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/Viewer.java
package org.eclipse.jface.viewers;
/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */
import org.eclipse.swt.events.HelpEvent;
import org.eclipse.swt.events.HelpListener;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Item;
import org.eclipse.jface.util.Assert;
import org.eclipse.jface.util.ListenerList;
/**
 * A viewer is a model-based adapter on a widget.
 * <p>
 * A viewer can be created as an adapter on a pre-existing control (e.g., 
 * creating a <code>ListViewer</code> on an existing <code>List</code> control).
 * All viewers also provide a convenience constructor for creating the control.
 * </p>