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 import android.graphics.RectF;
20 
21 import com.google.common.base.Joiner;
22 
23 import java.util.List;
24 
25 public abstract class CompositeImageRequestDescriptor extends ImageRequestDescriptor {
26     protected final List<? extends ImageRequestDescriptor> mDescriptors;
27     private final String mKey;
28 
CompositeImageRequestDescriptor(final List<? extends ImageRequestDescriptor> descriptors, final int desiredWidth, final int desiredHeight)29     public CompositeImageRequestDescriptor(final List<? extends ImageRequestDescriptor> descriptors,
30             final int desiredWidth, final int desiredHeight) {
31         super(desiredWidth, desiredHeight);
32         mDescriptors = descriptors;
33 
34         final String[] keyParts = new String[descriptors.size()];
35         for (int i = 0; i < descriptors.size(); i++) {
36             keyParts[i] = descriptors.get(i).getKey();
37         }
38         mKey = Joiner.on(",").skipNulls().join(keyParts);
39     }
40 
41     /**
42      * Gets a key that uniquely identify all the underlying image resource to be loaded (e.g. Uri or
43      * file path).
44      */
45     @Override
getKey()46     public String getKey() {
47         return mKey;
48     }
49 
getChildRequestDescriptors()50     public List<? extends ImageRequestDescriptor> getChildRequestDescriptors(){
51         return mDescriptors;
52     }
53 
getChildRequestTargetRects()54     public abstract List<RectF> getChildRequestTargetRects();
buildBatchImageRequest(final Context context)55     public abstract CompositeImageRequest<?> buildBatchImageRequest(final Context context);
56 
57     @Override
buildSyncMediaRequest(final Context context)58     public MediaRequest<ImageResource> buildSyncMediaRequest(final Context context) {
59         return buildBatchImageRequest(context);
60     }
61 }
62