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
if (o instanceof IMarker) {
                                    IResource r = ((IMarker) o).getResource();
                                    if (r.getType() != IResource.ROOT) {
                                        toSelect.add(r);
                                    }
                                }
                            }
                        }
                    }
                }
                if (toSelect.isEmpty()) {
                    Object input = context.getInput();
                    if (input instanceof IAdaptable) {
                        IAdaptable adaptable = (IAdaptable) input;
                        Object o = adaptable.getAdapter(IResource.class);
                        if (o instanceof IResource) {
                            toSelect.add(o);
                        }
                    }
                }
                if (!toSelect.isEmpty()) {
                    selectReveal(new StructuredSelection(toSelect));
                    return true;
                }
                return false;
            }
        };
    }
}