1 /*
2  * Copyright (C) 2008 Esmertec AG.
3  * Copyright (C) 2008 The Android Open Source Project
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *      http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 package android.database.sqlite;
19 
20 import android.compat.annotation.UnsupportedAppUsage;
21 import android.content.ContentResolver;
22 import android.content.ContentValues;
23 import android.content.Context;
24 import android.database.Cursor;
25 import android.net.Uri;
26 import android.util.Log;
27 import android.widget.Toast;
28 
29 /**
30  * @hide
31  */
32 
33 public final class SqliteWrapper {
34     private static final String TAG = "SqliteWrapper";
35     private static final String SQLITE_EXCEPTION_DETAIL_MESSAGE
36                 = "unable to open database file";
37 
SqliteWrapper()38     private SqliteWrapper() {
39         // Forbidden being instantiated.
40     }
41 
42     // FIXME: need to optimize this method.
isLowMemory(SQLiteException e)43     private static boolean isLowMemory(SQLiteException e) {
44         return e.getMessage().equals(SQLITE_EXCEPTION_DETAIL_MESSAGE);
45     }
46 
47     @UnsupportedAppUsage
checkSQLiteException(Context context, SQLiteException e)48     public static void checkSQLiteException(Context context, SQLiteException e) {
49         if (isLowMemory(e)) {
50             Toast.makeText(context, com.android.internal.R.string.low_memory,
51                     Toast.LENGTH_SHORT).show();
52         } else {
53             throw e;
54         }
55     }
56 
57     @UnsupportedAppUsage
query(Context context, ContentResolver resolver, Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder)58     public static Cursor query(Context context, ContentResolver resolver, Uri uri,
59             String[] projection, String selection, String[] selectionArgs, String sortOrder) {
60         try {
61             return resolver.query(uri, projection, selection, selectionArgs, sortOrder);
62         } catch (SQLiteException e) {
63             Log.e(TAG, "Catch a SQLiteException when query: ", e);
64             checkSQLiteException(context, e);
65             return null;
66         }
67     }
68 
requery(Context context, Cursor cursor)69     public static boolean requery(Context context, Cursor cursor) {
70         try {
71             return cursor.requery();
72         } catch (SQLiteException e) {
73             Log.e(TAG, "Catch a SQLiteException when requery: ", e);
74             checkSQLiteException(context, e);
75             return false;
76         }
77     }
78     @UnsupportedAppUsage
update(Context context, ContentResolver resolver, Uri uri, ContentValues values, String where, String[] selectionArgs)79     public static int update(Context context, ContentResolver resolver, Uri uri,
80             ContentValues values, String where, String[] selectionArgs) {
81         try {
82             return resolver.update(uri, values, where, selectionArgs);
83         } catch (SQLiteException e) {
84             Log.e(TAG, "Catch a SQLiteException when update: ", e);
85             checkSQLiteException(context, e);
86             return -1;
87         }
88     }
89 
90     @UnsupportedAppUsage
delete(Context context, ContentResolver resolver, Uri uri, String where, String[] selectionArgs)91     public static int delete(Context context, ContentResolver resolver, Uri uri,
92             String where, String[] selectionArgs) {
93         try {
94             return resolver.delete(uri, where, selectionArgs);
95         } catch (SQLiteException e) {
96             Log.e(TAG, "Catch a SQLiteException when delete: ", e);
97             checkSQLiteException(context, e);
98             return -1;
99         }
100     }
101 
102     @UnsupportedAppUsage
insert(Context context, ContentResolver resolver, Uri uri, ContentValues values)103     public static Uri insert(Context context, ContentResolver resolver,
104             Uri uri, ContentValues values) {
105         try {
106             return resolver.insert(uri, values);
107         } catch (SQLiteException e) {
108             Log.e(TAG, "Catch a SQLiteException when insert: ", e);
109             checkSQLiteException(context, e);
110             return null;
111         }
112     }
113 }
114