1 /*
2  * Copyright (C) 2018 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 com.android.launcher3.util;
18 
19 import static android.database.sqlite.SQLiteDatabase.NO_LOCALIZED_COLLATORS;
20 
21 import android.content.Context;
22 import android.content.ContextWrapper;
23 import android.database.DatabaseErrorHandler;
24 import android.database.sqlite.SQLiteDatabase;
25 import android.database.sqlite.SQLiteDatabase.CursorFactory;
26 import android.database.sqlite.SQLiteDatabase.OpenParams;
27 import android.database.sqlite.SQLiteOpenHelper;
28 import android.os.Build;
29 
30 /**
31  * Extension of {@link SQLiteOpenHelper} which avoids creating default locale table by
32  * A context wrapper which creates databases without support for localized collators.
33  */
34 public abstract class NoLocaleSQLiteHelper extends SQLiteOpenHelper {
35 
36     private static final boolean ATLEAST_P =
37             Build.VERSION.SDK_INT >= Build.VERSION_CODES.P;
38 
NoLocaleSQLiteHelper(Context context, String name, int version)39     public NoLocaleSQLiteHelper(Context context, String name, int version) {
40         super(ATLEAST_P ? context : new NoLocalContext(context), name, null, version);
41         if (ATLEAST_P) {
42             setOpenParams(new OpenParams.Builder().addOpenFlags(NO_LOCALIZED_COLLATORS).build());
43         }
44     }
45 
46     private static class NoLocalContext extends ContextWrapper {
NoLocalContext(Context base)47         public NoLocalContext(Context base) {
48             super(base);
49         }
50 
51         @Override
openOrCreateDatabase( String name, int mode, CursorFactory factory, DatabaseErrorHandler errorHandler)52         public SQLiteDatabase openOrCreateDatabase(
53                 String name, int mode, CursorFactory factory, DatabaseErrorHandler errorHandler) {
54             return super.openOrCreateDatabase(
55                     name, mode | Context.MODE_NO_LOCALIZED_COLLATORS, factory, errorHandler);
56         }
57     }
58 }
59