1/*
2 * Copyright (C) 2017 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 android.arch.persistence.room;
18
19import android.support.annotation.RestrictTo;
20
21/**
22 * Schema information about Room's master table.
23 *
24 * @hide
25 */
26@SuppressWarnings("WeakerAccess")
27@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
28public class RoomMasterTable {
29    /**
30     * The master table where room keeps its metadata information.
31     */
32    public static final String TABLE_NAME = "room_master_table";
33    // must match the runtime property Room#MASTER_TABLE_NAME
34    public static final String NAME = "room_master_table";
35    private static final String COLUMN_ID = "id";
36    private static final String COLUMN_IDENTITY_HASH = "identity_hash";
37    public static final String DEFAULT_ID = "42";
38
39    public static final String CREATE_QUERY = "CREATE TABLE IF NOT EXISTS " + TABLE_NAME + " ("
40            + COLUMN_ID + " INTEGER PRIMARY KEY,"
41            + COLUMN_IDENTITY_HASH + " TEXT)";
42
43    public static final String READ_QUERY = "SELECT " + COLUMN_IDENTITY_HASH
44            + " FROM " + TABLE_NAME + " WHERE "
45            + COLUMN_ID + " = " + DEFAULT_ID + " LIMIT 1";
46
47    /**
48     * We don't escape here since we know what we are passing.
49     */
50    public static String createInsertQuery(String hash) {
51        return "INSERT OR REPLACE INTO " + TABLE_NAME + " ("
52                + COLUMN_ID + "," + COLUMN_IDENTITY_HASH + ")"
53                + " VALUES(" + DEFAULT_ID + ", \"" + hash + "\")";
54    }
55}
56