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
handleSelectionChanged(event);
            }
        });
        viewer.addDoubleClickListener(new IDoubleClickListener() {
            public void doubleClick(DoubleClickEvent event) {
                handleDoubleClick(event);
            }
        });
        viewer.addOpenListener(new IOpenListener() {
            public void open(OpenEvent event) {
                handleOpen(event);
            }
        });
        viewer.getControl().addKeyListener(new KeyListener() {
            public void keyPressed(KeyEvent event) {
                handleKeyPressed(event);
            }
            public void keyReleased(KeyEvent event) {
                handleKeyReleased(event);
            }
        });
    }
    /* (non-Javadoc)
     * Method declared on IWorkbenchPart.
     */
    public void dispose() {
        getSite().getPage().removePartListener(partListener);
        IWorkingSetManager workingSetManager = getPlugin().getWorkbench()
                .getWorkingSetManager();
        workingSetManager.removePropertyChangeListener(propertyChangeListener);