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
viewer.setInput(getInitialInput());
        
        
        makeActions();
        
        
        getActionGroup().fillActionBars(getViewSite().getActionBars());
        updateActionBars((IStructuredSelection) viewer.getSelection());
        getSite().setSelectionProvider(viewer);
        getSite().getPage().addPartListener(partListener);
        IWorkingSetManager workingSetManager = getPlugin().getWorkbench()
                .getWorkingSetManager();
        workingSetManager.addPropertyChangeListener(propertyChangeListener);
        if (memento != null)
            restoreState(memento);
        memento = null;
         
        getSite().getWorkbenchWindow().getWorkbench().getHelpSystem().setHelp(
				viewer.getControl(), getHelpContextId());
    }
    /**
     * Returns the help context id to use for this view.
     * 
     * @since 2.0
     */
    protected String getHelpContextId() {
        return INavigatorHelpContextIds.RESOURCE_VIEW;
    }
    /**