1 /*
2  * Copyright (C) 2011 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.inputmethod.latin.utils;
18 
19 import android.os.Handler;
20 import android.os.Looper;
21 
22 import java.lang.ref.WeakReference;
23 
24 public class LeakGuardHandlerWrapper<T> extends Handler {
25     private final WeakReference<T> mOwnerInstanceRef;
26 
LeakGuardHandlerWrapper(final T ownerInstance)27     public LeakGuardHandlerWrapper(final T ownerInstance) {
28         this(ownerInstance, Looper.myLooper());
29     }
30 
LeakGuardHandlerWrapper(final T ownerInstance, final Looper looper)31     public LeakGuardHandlerWrapper(final T ownerInstance, final Looper looper) {
32         super(looper);
33         if (ownerInstance == null) {
34             throw new NullPointerException("ownerInstance is null");
35         }
36         mOwnerInstanceRef = new WeakReference<>(ownerInstance);
37     }
38 
getOwnerInstance()39     public T getOwnerInstance() {
40         return mOwnerInstanceRef.get();
41     }
42 }
43