1 /*
2  * Copyright (C) 2013 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 
17 package com.android.camera.data;
18 
19 import android.content.Context;
20 
21 /**
22  * A helper class to load the metadata of
23  * {@link FilmstripItem}.
24  */
25 public class MetadataLoader {
26 
27     /**
28      * Adds information to the data's metadata bundle if any is available and returns
29      * true if metadata was added and false otherwise. In either case, sets
30      * a flag indicating that we've cached any available metadata and don't need to
31      * load metadata again for this particular item.
32      *
33      * TODO: Replace with more explicit polymorphism.
34      *
35      * @param context A context.
36      * @param data The data to update metadata for.
37      * @return true if any metadata was added to the data, false otherwise.
38      */
loadMetadata(final Context context, final FilmstripItem data)39     public static boolean loadMetadata(final Context context, final FilmstripItem data) {
40         boolean metadataAdded = false;
41         if (data.getAttributes().isImage()) {
42             metadataAdded |= PanoramaMetadataLoader.loadPanoramaMetadata(
43                     context, data.getData().getUri(), data.getMetadata());
44             metadataAdded |=  RgbzMetadataLoader.loadRgbzMetadata(
45                     context, data.getData().getUri(), data.getMetadata());
46         } else if (data.getAttributes().isVideo()) {
47             metadataAdded = VideoRotationMetadataLoader.loadRotationMetadata(data);
48         }
49         data.getMetadata().setLoaded(true);
50         return metadataAdded;
51     }
52 }
53 
54