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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.volley.toolbox;
import android.os.Handler;
import android.os.Looper;
import com.android.volley.Cache;
import com.android.volley.NetworkResponse;
import com.android.volley.Request;
import com.android.volley.Response;
/** A synthetic request used for clearing the cache. */
public class ClearCacheRequest extends Request<Object> {
private final Cache mCache;
private final Runnable mCallback;
/**
* Creates a synthetic request for clearing the cache.
*
* @param cache Cache to clear
* @param callback Callback to make on the main thread once the cache is clear, or null for none
*/
public ClearCacheRequest(Cache cache, Runnable callback) {
super(Method.GET, null, null);
mCache = cache;
mCallback = callback;
}
@Override
public boolean isCanceled() {
// This is a little bit of a hack, but hey, why not.
mCache.clear();
if (mCallback != null) {
Handler handler = new Handler(Looper.getMainLooper());
handler.postAtFrontOfQueue(mCallback);
}
return true;
}
@Override
public Priority getPriority() {
return Priority.IMMEDIATE;
}
@Override
protected Response<Object> parseNetworkResponse(NetworkResponse response) {
return null;
}
@Override
protected void deliverResponse(Object response) {}
}
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