1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.photos.data;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import com.android.photos.data.PhotoProvider.Albums;
import com.android.photos.data.PhotoProvider.Metadata;
import com.android.photos.data.PhotoProvider.Photos;
/**
* Used in PhotoProvider to create and access the database containing
* information about photo and video information stored on the server.
*/
public class PhotoDatabase extends SQLiteOpenHelper {
@SuppressWarnings("unused")
private static final String TAG = PhotoDatabase.class.getSimpleName();
static final String DB_NAME = "photo.db";
static final int DB_VERSION = 1;
private static final String SQL_CREATE_TABLE = "CREATE TABLE ";
private static final String[][] CREATE_PHOTO = {
{ Photos._ID, "INTEGER PRIMARY KEY AUTOINCREMENT" },
{ Photos.SERVER_ID, "INTEGER UNIQUE" },
{ Photos.WIDTH, "INTEGER NOT NULL" },
{ Photos.HEIGHT, "INTEGER NOT NULL" },
{ Photos.DATE_TAKEN, "INTEGER NOT NULL" },
// Photos.ALBUM_ID is a foreign key to Albums._ID
{ Photos.ALBUM_ID, "INTEGER" },
{ Photos.MIME_TYPE, "TEXT NOT NULL" },
};
private static final String[][] CREATE_ALBUM = {
{ Albums._ID, "INTEGER PRIMARY KEY AUTOINCREMENT" },
// Albums.PARENT_ID is a foriegn key to Albums._ID
{ Albums.PARENT_ID, "INTEGER" },
{ Albums.NAME, "Text NOT NULL" },
{ Albums.VISIBILITY, "INTEGER NOT NULL" },
{ Albums.SERVER_ID, "INTEGER UNIQUE" },
createUniqueConstraint(Albums.PARENT_ID, Albums.NAME),
};
private static final String[][] CREATE_METADATA = {
{ Metadata._ID, "INTEGER PRIMARY KEY AUTOINCREMENT" },
// Metadata.PHOTO_ID is a foreign key to Photos._ID
{ Metadata.PHOTO_ID, "INTEGER NOT NULL" },
{ Metadata.KEY, "TEXT NOT NULL" },
{ Metadata.VALUE, "TEXT NOT NULL" },
createUniqueConstraint(Metadata.PHOTO_ID, Metadata.KEY),
};
@Override
public void onCreate(SQLiteDatabase db) {
createTable(db, Albums.TABLE, CREATE_ALBUM);
createTable(db, Photos.TABLE, CREATE_PHOTO);
createTable(db, Metadata.TABLE, CREATE_METADATA);
}
public PhotoDatabase(Context context) {
super(context, DB_NAME, null, DB_VERSION);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
protected static void createTable(SQLiteDatabase db, String table, String[][] columns) {
StringBuilder create = new StringBuilder(SQL_CREATE_TABLE);
create.append(table).append('(');
boolean first = true;
for (String[] column : columns) {
if (!first) {
create.append(',');
}
first = false;
for (String val: column) {
create.append(val).append(' ');
}
}
create.append(')');
db.beginTransaction();
try {
db.execSQL(create.toString());
db.setTransactionSuccessful();
} finally {
db.endTransaction();
}
}
protected static String[] createUniqueConstraint(String column1, String column2) {
return new String[] {
"UNIQUE(", column1, ",", column2, ")"
};
}
}
|
