1/*
2 * Copyright (C) 2012 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.gallery3d.data;
17
18import com.android.gallery3d.app.GalleryApp;
19
20public class SnailSource extends MediaSource {
21    @SuppressWarnings("unused")
22    private static final String TAG = "SnailSource";
23    private static final int SNAIL_ALBUM = 0;
24    private static final int SNAIL_ITEM = 1;
25
26    private GalleryApp mApplication;
27    private PathMatcher mMatcher;
28    private static int sNextId;
29
30    public SnailSource(GalleryApp application) {
31        super("snail");
32        mApplication = application;
33        mMatcher = new PathMatcher();
34        mMatcher.add("/snail/set/*", SNAIL_ALBUM);
35        mMatcher.add("/snail/item/*", SNAIL_ITEM);
36    }
37
38    // The only path we accept is "/snail/set/id" and "/snail/item/id"
39    @Override
40    public MediaObject createMediaObject(Path path) {
41        DataManager dataManager = mApplication.getDataManager();
42        switch (mMatcher.match(path)) {
43            case SNAIL_ALBUM:
44                String itemPath = "/snail/item/" + mMatcher.getVar(0);
45                SnailItem item =
46                        (SnailItem) dataManager.getMediaObject(itemPath);
47                return new SnailAlbum(path, item);
48            case SNAIL_ITEM: {
49                int id = mMatcher.getIntVar(0);
50                return new SnailItem(path);
51            }
52        }
53        return null;
54    }
55
56    // Registers a new SnailAlbum containing a SnailItem and returns the id of
57    // them. You can obtain the Path of the SnailAlbum and SnailItem associated
58    // with the id by getSetPath and getItemPath().
59    public static synchronized int newId() {
60        return sNextId++;
61    }
62
63    public static Path getSetPath(int id) {
64        return Path.fromString("/snail/set").getChild(id);
65    }
66
67    public static Path getItemPath(int id) {
68        return Path.fromString("/snail/item").getChild(id);
69    }
70}
71