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  */
16 package com.android.messaging.datamodel.media;
17 
18 import android.content.Context;
19 
20 import java.io.FileNotFoundException;
21 import java.io.IOException;
22 import java.io.InputStream;
23 import java.util.List;
24 
25 /**
26  * Serves local content URI based image requests.
27  */
28 public class UriImageRequest<D extends UriImageRequestDescriptor> extends ImageRequest<D> {
UriImageRequest(final Context context, final D descriptor)29     public UriImageRequest(final Context context, final D descriptor) {
30         super(context, descriptor);
31     }
32 
33     @Override
getInputStreamForResource()34     protected InputStream getInputStreamForResource() throws FileNotFoundException {
35         return mContext.getContentResolver().openInputStream(mDescriptor.uri);
36     }
37 
38     @Override
loadMediaInternal(List<MediaRequest<ImageResource>> chainedTasks)39     protected ImageResource loadMediaInternal(List<MediaRequest<ImageResource>> chainedTasks)
40             throws IOException {
41         final ImageResource resource = super.loadMediaInternal(chainedTasks);
42         // Check if the caller asked for compression. If so, chain an encoding task if possible.
43         if (mDescriptor.allowCompression && chainedTasks != null) {
44             @SuppressWarnings("unchecked")
45             final MediaRequest<ImageResource> chainedTask = (MediaRequest<ImageResource>)
46                     resource.getMediaEncodingRequest(this);
47             if (chainedTask != null) {
48                 chainedTasks.add(chainedTask);
49                 // Don't cache decoded image resource since we'll perform compression and cache
50                 // the compressed resource.
51                 if (resource instanceof DecodedImageResource) {
52                     ((DecodedImageResource) resource).setCacheable(false);
53                 }
54             }
55         }
56         return resource;
57     }
58 }
59