Jean-Baptiste Queru | d56b88a | 2012-11-07 07:48:57 -0800 | [diff] [blame] | 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.volley.toolbox; |
| 18 | |
| 19 | import com.android.volley.Cache; |
| 20 | import com.android.volley.NetworkResponse; |
| 21 | import com.android.volley.Request; |
| 22 | import com.android.volley.Response; |
| 23 | |
| 24 | import android.os.Handler; |
| 25 | import android.os.Looper; |
| 26 | |
| 27 | /** |
| 28 | * A synthetic request used for clearing the cache. |
| 29 | */ |
| 30 | public class ClearCacheRequest extends Request<Object> { |
| 31 | private final Cache mCache; |
| 32 | private final Runnable mCallback; |
| 33 | |
| 34 | /** |
| 35 | * Creates a synthetic request for clearing the cache. |
| 36 | * @param cache Cache to clear |
| 37 | * @param callback Callback to make on the main thread once the cache is clear, |
| 38 | * or null for none |
| 39 | */ |
| 40 | public ClearCacheRequest(Cache cache, Runnable callback) { |
Jean-Baptiste Queru | e48f443 | 2012-11-07 07:54:36 -0800 | [diff] [blame] | 41 | super(Method.GET, null, null); |
Jean-Baptiste Queru | d56b88a | 2012-11-07 07:48:57 -0800 | [diff] [blame] | 42 | mCache = cache; |
| 43 | mCallback = callback; |
| 44 | } |
| 45 | |
| 46 | @Override |
| 47 | public boolean isCanceled() { |
| 48 | // This is a little bit of a hack, but hey, why not. |
| 49 | mCache.clear(); |
| 50 | if (mCallback != null) { |
| 51 | Handler handler = new Handler(Looper.getMainLooper()); |
| 52 | handler.postAtFrontOfQueue(mCallback); |
| 53 | } |
| 54 | return true; |
| 55 | } |
| 56 | |
| 57 | @Override |
| 58 | public Priority getPriority() { |
| 59 | return Priority.IMMEDIATE; |
| 60 | } |
| 61 | |
| 62 | @Override |
| 63 | protected Response<Object> parseNetworkResponse(NetworkResponse response) { |
| 64 | return null; |
| 65 | } |
| 66 | |
| 67 | @Override |
| 68 | protected void deliverResponse(Object response) { |
| 69 | } |
| 70 | } |