1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package android.databinding;
17 
18 /**
19  * Utility class for managing Observable callbacks.
20  */
21 public class PropertyChangeRegistry extends
22         CallbackRegistry<Observable.OnPropertyChangedCallback, Observable, Void> {
23 
24     private static final CallbackRegistry.NotifierCallback<Observable.OnPropertyChangedCallback, Observable, Void> NOTIFIER_CALLBACK = new CallbackRegistry.NotifierCallback<Observable.OnPropertyChangedCallback, Observable, Void>() {
25         @Override
26         public void onNotifyCallback(Observable.OnPropertyChangedCallback callback, Observable sender,
27                 int arg, Void notUsed) {
28             callback.onPropertyChanged(sender, arg);
29         }
30     };
31 
PropertyChangeRegistry()32     public PropertyChangeRegistry() {
33         super(NOTIFIER_CALLBACK);
34     }
35 
36     /**
37      * Notifies registered callbacks that a specific property has changed.
38      *
39      * @param observable The Observable that has changed.
40      * @param propertyId The BR id of the property that has changed or BR._all if the entire
41      *                   Observable has changed.
42      */
notifyChange(Observable observable, int propertyId)43     public void notifyChange(Observable observable, int propertyId) {
44         notifyCallbacks(observable, propertyId, null);
45     }
46 }
47