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
17package com.android.camera.data;
18
19import android.content.Context;
20
21/**
22 * A helper class to load the metadata of
23 * {@link FilmstripItem}.
24 */
25public 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     */
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