1 /*
2  * Copyright 2021 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 foo.bar;
18 import androidx.room.*;
19 
20 @Entity
21 public class Song {
22     @PrimaryKey
23     public final int mSongId;
24     public final String mTitle;
25     public final String mArtist;
26     public final String mAlbum;
27     public final int mLength; // in seconds
28     public final int mReleasedYear;
29 
30 
Song(int songId, String title, String artist, String album, int length, int releasedYear)31     public Song(int songId, String title, String artist, String album, int length,
32             int releasedYear) {
33         mSongId = songId;
34         mTitle = title;
35         mArtist = artist;
36         mAlbum = album;
37         mLength = length;
38         mReleasedYear = releasedYear;
39     }
40 
41     @Override
equals(Object o)42     public boolean equals(Object o) {
43         if (this == o) return true;
44         if (o == null || getClass() != o.getClass()) return false;
45 
46         Song song = (Song) o;
47 
48         if (mSongId != song.mSongId) return false;
49         if (mLength != song.mLength) return false;
50         if (mReleasedYear != song.mReleasedYear) return false;
51         if (mTitle != null ? !mTitle.equals(song.mTitle) : song.mTitle != null) return false;
52         if (mArtist != null ? !mArtist.equals(song.mArtist) : song.mArtist != null) return false;
53         return mAlbum != null ? mAlbum.equals(song.mAlbum) : song.mAlbum == null;
54     }
55 
56     @Override
hashCode()57     public int hashCode() {
58         int result = mSongId;
59         result = 31 * result + (mTitle != null ? mTitle.hashCode() : 0);
60         result = 31 * result + (mArtist != null ? mArtist.hashCode() : 0);
61         result = 31 * result + (mAlbum != null ? mAlbum.hashCode() : 0);
62         result = 31 * result + mLength;
63         result = 31 * result + mReleasedYear;
64         return result;
65     }
66 }