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 */
16
17package com.android.gallery3d.data;
18
19import java.util.ArrayList;
20
21public class FilterEmptyPromptSet extends MediaSet implements ContentListener {
22    @SuppressWarnings("unused")
23    private static final String TAG = "FilterEmptyPromptSet";
24
25    private ArrayList<MediaItem> mEmptyItem;
26    private MediaSet mBaseSet;
27
28    public FilterEmptyPromptSet(Path path, MediaSet baseSet, MediaItem emptyItem) {
29        super(path, INVALID_DATA_VERSION);
30        mEmptyItem = new ArrayList<MediaItem>(1);
31        mEmptyItem.add(emptyItem);
32        mBaseSet = baseSet;
33        mBaseSet.addContentListener(this);
34    }
35
36    @Override
37    public int getMediaItemCount() {
38        int itemCount = mBaseSet.getMediaItemCount();
39        if (itemCount > 0) {
40            return itemCount;
41        } else {
42            return 1;
43        }
44    }
45
46    @Override
47    public ArrayList<MediaItem> getMediaItem(int start, int count) {
48        int itemCount = mBaseSet.getMediaItemCount();
49        if (itemCount > 0) {
50            return mBaseSet.getMediaItem(start, count);
51        } else if (start == 0 && count == 1) {
52            return mEmptyItem;
53        } else {
54            throw new ArrayIndexOutOfBoundsException();
55        }
56    }
57
58    @Override
59    public void onContentDirty() {
60        notifyContentChanged();
61    }
62
63    @Override
64    public boolean isLeafAlbum() {
65        return true;
66    }
67
68    @Override
69    public boolean isCameraRoll() {
70        return mBaseSet.isCameraRoll();
71    }
72
73    @Override
74    public long reload() {
75        return mBaseSet.reload();
76    }
77
78    @Override
79    public String getName() {
80        return mBaseSet.getName();
81    }
82}
83