1 /*
2  * Copyright (C) 2013 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 
17 package com.android.mail.utils;
18 
19 import android.database.DataSetObservable;
20 import android.database.DataSetObserver;
21 
22 /**
23  * A Utility class to register observers and return logging and counts for the number of registered
24  * observers.
25  */
26 public class MailObservable extends DataSetObservable {
27     protected static final String LOG_TAG = LogTag.getLogTag();
28     private final String mName;
29 
MailObservable(String name)30     public MailObservable(String name) {
31         mName = name;
32     }
33 
34     @Override
registerObserver(DataSetObserver observer)35     public void registerObserver(DataSetObserver observer) {
36         final int count = mObservers.size();
37         super.registerObserver(observer);
38         LogUtils.d(LOG_TAG, "IN register(%s)Observer: %s before=%d after=%d",
39                 mName,  observer, count, mObservers.size());
40     }
41 
42     @Override
unregisterObserver(DataSetObserver observer)43     public void unregisterObserver(DataSetObserver observer) {
44         final int count = mObservers.size();
45         super.unregisterObserver(observer);
46         LogUtils.d(LOG_TAG, "IN unregister(%s)Observer: %s before=%d after=%d",
47                 mName, observer, count, mObservers.size());
48     }
49 }
50