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
linkScheduled = false;
                    
                    if (viewer == null || viewer.getControl() == null || viewer.getControl().isDisposed()) {
                        return;
                    }
                    
                    if (dragDetected == false) {
                        ISelection sel = viewer.getSelection();
                        if (sel instanceof IStructuredSelection) {
                            IStructuredSelection selection = (StructuredSelection)sel;
                        
                             
                            
                            linkToEditor(selection);
                        }
                    }
                }
            });
        }
    }
    /**
     * Handles a key press event from the viewer.
     * Delegates to the action group.
     * 
     * @param event the key event
     * @since 2.0
     */
    protected void handleKeyPressed(KeyEvent event) {
        getActionGroup().handleKeyPressed(event);