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
} else {
                    if (o instanceof IAdaptable) {
                        resource = (IResource) ((IAdaptable) o)
                                .getAdapter(IResource.class);
                    }
                }
                if (resource != null) {
                    list.add(resource);
                }
            }
        }
        return new StructuredSelection(list);
    }
    /* (non-Javadoc)
     * Method declared on IWorkbenchPart.
     */
    public void createPartControl(Composite parent) {
        TreeViewer viewer = createViewer(parent);
        this.viewer = viewer;
        if (memento != null) {
            restoreFilters();
            restoreLinkingEnabled();
        }
        frameList = createFrameList();
        initDragAndDrop();
        updateTitle();
        initContextMenu();
        initResourceSorter();
        initWorkingSetFilter();