PropertyChangeRegistry.java revision 9784c9aaedeb863018f5fcaa0a598e8e2f8ed2f3 
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 */
16package android.databinding;
17
18/**
19 * Utility class for managing Observable callbacks.
20 */
21public 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
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     */
43    public void notifyChange(Observable observable, int propertyId) {
44        notifyCallbacks(observable, propertyId, null);
45    }
46}
47