Generify ordered list fragment helper for use with gtasks

astrid/plugin-src/com/todoroo/astrid/subtasks/OrderedListFragmentHelper.java

@@ -36,21 +36,22 @@ import com.todoroo.astrid.subtasks.OrderedListUpdater.Node;
 import com.todoroo.astrid.subtasks.OrderedListUpdater.OrderedListNodeVisitor;
 import com.todoroo.astrid.ui.DraggableListView;
 
-public class SubtasksFragmentHelper {
+public class OrderedListFragmentHelper<LIST> {
 
     private final DisplayMetrics metrics = new DisplayMetrics();
-    private final SubtasksUpdater updater = new SubtasksUpdater();
+    private final OrderedListUpdater<LIST> updater;
     private final TaskListFragment fragment;
 
     @Autowired TaskService taskService;
 
     private DraggableTaskAdapter taskAdapter;
 
-    private String list;
+    private LIST list;
 
-    public SubtasksFragmentHelper(TaskListFragment fragment) {
+    public OrderedListFragmentHelper(TaskListFragment fragment, OrderedListUpdater<LIST> updater) {
         DependencyInjectionService.getInstance().inject(this);
         this.fragment = fragment;
+        this.updater = updater;
     }
 
     // --- ui component setup
@@ -83,8 +84,7 @@ public class SubtasksFragmentHelper {
     }
 
     public void beforeSetUpTaskList(Filter filter) {
-        updater.applySubtasksToFilter(filter, list);
-        updater.sanitizeTaskList(filter, list);
+        updater.initialize(list, filter);
     }
 
     public Property<?>[] taskProperties() {
@@ -259,7 +259,7 @@ public class SubtasksFragmentHelper {
         }
     }
 
-    public void setList(String list) {
+    public void setList(LIST list) {
         this.list = list;
     }
 

astrid/plugin-src/com/todoroo/astrid/subtasks/OrderedListUpdater.java

@@ -25,7 +25,7 @@ abstract public class OrderedListUpdater<LIST> {
         public void processTask(long taskId, Metadata metadata);
     }
 
-    // --- abstract
+    // --- abstract and empty
 
     abstract protected Metadata getTaskMetadata(LIST list, long taskId);
 
@@ -39,7 +39,17 @@ abstract public class OrderedListUpdater<LIST> {
 
     abstract protected Metadata createEmptyMetadata(LIST list, long taskId);
 
-    /** @param list */
+    /**
+     * @param list
+     * @param filter
+     */
+    protected void initialize(LIST list, Filter filter) {
+        //
+    }
+
+    /**
+     * @param list
+     */
     protected void beforeIndent(LIST list) {
         //
     }

astrid/plugin-src/com/todoroo/astrid/subtasks/SubtasksListFragment.java

@@ -18,11 +18,11 @@ import com.todoroo.astrid.data.Task;
  */
 public class SubtasksListFragment extends TaskListFragment {
 
-    private final SubtasksFragmentHelper helper;
+    private final OrderedListFragmentHelper<String> helper;
 
     public SubtasksListFragment() {
         super();
-        helper = new SubtasksFragmentHelper(this);
+        helper = new OrderedListFragmentHelper<String>(this, new SubtasksUpdater());
         helper.setList(SubtasksMetadata.LIST_ACTIVE_TASKS);
     }
 

astrid/plugin-src/com/todoroo/astrid/subtasks/SubtasksTagListFragment.java

@@ -12,11 +12,11 @@ import com.todoroo.astrid.data.Task;
 
 public class SubtasksTagListFragment extends TagViewFragment {
 
-    private final SubtasksFragmentHelper helper;
+    private final OrderedListFragmentHelper<String> helper;
 
     public SubtasksTagListFragment() {
         super();
-        helper = new SubtasksFragmentHelper(this);
+        helper = new OrderedListFragmentHelper<String>(this, new SubtasksUpdater());
     }
 
     @Override

astrid/plugin-src/com/todoroo/astrid/subtasks/SubtasksUpdater.java

@@ -38,6 +38,12 @@ public class SubtasksUpdater extends OrderedListUpdater<String> {
         return null;
     }
 
+    @Override
+    protected void initialize(String list, Filter filter) {
+        applySubtasksToFilter(filter, list);
+        sanitizeTaskList(filter, list);
+    }
+
     @Override
     protected Metadata getTaskMetadata(String list, long taskId) {
         TodorooCursor<Metadata> cursor = metadataService.query(Query.select(Metadata.PROPERTIES).where(