Bug 121772 [Viewers] ClassCastException opening file from Navigator
I get a class cast exception when I open a file from the navigator. The problem is that there is a cast to StructuredSelection instead of IStructuredSelection in the ResourceNavigator class (and the object being cast is a TreeSelection). Here are the interesting lines of the trace. Caused by: java.lang.ClassCastException: org/eclipse/jface/viewers/TreeSelection incompatible with org/eclipse/jface/viewers/StructuredSelection at org.eclipse.ui.views.navigator.ResourceNavigator$8.run(ResourceNavigator.java:726)
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/navigator/ResourceNavigator.java
return this.patternFilter;
    }
    /**
     * Returns the working set for this view.
     *
     * @return the working set
     * @since 2.0
     */
    public IWorkingSet getWorkingSet() {
        return workingSetFilter.getWorkingSet();
    }
    /**
     * Returns the navigator's plugin.
     */
    public AbstractUIPlugin getPlugin() {
        return IDEWorkbenchPlugin.getDefault();
    }
    /**
     * Returns the sorter.
     * @since 2.0
     */
    public ResourceSorter getSorter() {
        return (ResourceSorter) getTreeViewer().getSorter();
    }
    /**
     * Returns the resource viewer which shows the resource hierarchy.
     * @since 2.0
     */
    public TreeViewer getViewer() {
        return viewer;