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 android.content.Context;
19import android.graphics.RectF;
20
21import com.google.common.base.Joiner;
22
23import java.util.List;
24
25public abstract class CompositeImageRequestDescriptor extends ImageRequestDescriptor {
26    protected final List<? extends ImageRequestDescriptor> mDescriptors;
27    private final String mKey;
28
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
46    public String getKey() {
47        return mKey;
48    }
49
50    public List<? extends ImageRequestDescriptor> getChildRequestDescriptors(){
51        return mDescriptors;
52    }
53
54    public abstract List<RectF> getChildRequestTargetRects();
55    public abstract CompositeImageRequest<?> buildBatchImageRequest(final Context context);
56
57    @Override
58    public MediaRequest<ImageResource> buildSyncMediaRequest(final Context context) {
59        return buildBatchImageRequest(context);
60    }
61}
62