1/*
2 * Copyright (C) 2015 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 com.android.messaging.datamodel.media;
17
18import com.android.messaging.datamodel.media.MediaResourceManager.MediaResourceLoadListener;
19
20import java.util.List;
21
22/**
23 * A mix-in style class that wraps around a normal, threading-agnostic MediaRequest object with
24 * functionalities offered by {@link BindableMediaRequest} to allow for async processing.
25 */
26class AsyncMediaRequestWrapper<T extends RefCountedMediaResource> extends BindableMediaRequest<T> {
27
28    /**
29     * Create a new async media request wrapper instance given the listener.
30     */
31    public static <T extends RefCountedMediaResource> AsyncMediaRequestWrapper<T>
32            createWith(final MediaRequest<T> wrappedRequest,
33                    final MediaResourceLoadListener<T> listener) {
34        return new AsyncMediaRequestWrapper<T>(listener, wrappedRequest);
35    }
36
37    private final MediaRequest<T> mWrappedRequest;
38
39    private AsyncMediaRequestWrapper(final MediaResourceLoadListener<T> listener,
40            final MediaRequest<T> wrappedRequest) {
41        super(listener);
42        mWrappedRequest = wrappedRequest;
43    }
44
45    @Override
46    public String getKey() {
47        return mWrappedRequest.getKey();
48    }
49
50    @Override
51    public MediaCache<T> getMediaCache() {
52        return mWrappedRequest.getMediaCache();
53    }
54
55    @Override
56    public int getRequestType() {
57        return mWrappedRequest.getRequestType();
58    }
59
60    @Override
61    public T loadMediaBlocking(List<MediaRequest<T>> chainedTask) throws Exception {
62        return mWrappedRequest.loadMediaBlocking(chainedTask);
63    }
64
65    @Override
66    public int getCacheId() {
67        return mWrappedRequest.getCacheId();
68    }
69
70    @Override
71    public MediaRequestDescriptor<T> getDescriptor() {
72        return mWrappedRequest.getDescriptor();
73    }
74}