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
18package android.database.sqlite;
19
20import android.content.ContentResolver;
21import android.content.ContentValues;
22import android.content.Context;
23import android.database.Cursor;
24import android.database.sqlite.SQLiteException;
25import android.net.Uri;
26import android.util.Log;
27import android.widget.Toast;
28
29/**
30 * @hide
31 */
32
33public 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
38    private SqliteWrapper() {
39        // Forbidden being instantiated.
40    }
41
42    // FIXME: need to optimize this method.
43    private static boolean isLowMemory(SQLiteException e) {
44        return e.getMessage().equals(SQLITE_EXCEPTION_DETAIL_MESSAGE);
45    }
46
47    public static void checkSQLiteException(Context context, SQLiteException e) {
48        if (isLowMemory(e)) {
49            Toast.makeText(context, com.android.internal.R.string.low_memory,
50                    Toast.LENGTH_SHORT).show();
51        } else {
52            throw e;
53        }
54    }
55
56    public static Cursor query(Context context, ContentResolver resolver, Uri uri,
57            String[] projection, String selection, String[] selectionArgs, String sortOrder) {
58        try {
59            return resolver.query(uri, projection, selection, selectionArgs, sortOrder);
60        } catch (SQLiteException e) {
61            Log.e(TAG, "Catch a SQLiteException when query: ", e);
62            checkSQLiteException(context, e);
63            return null;
64        }
65    }
66
67    public static boolean requery(Context context, Cursor cursor) {
68        try {
69            return cursor.requery();
70        } catch (SQLiteException e) {
71            Log.e(TAG, "Catch a SQLiteException when requery: ", e);
72            checkSQLiteException(context, e);
73            return false;
74        }
75    }
76    public static int update(Context context, ContentResolver resolver, Uri uri,
77            ContentValues values, String where, String[] selectionArgs) {
78        try {
79            return resolver.update(uri, values, where, selectionArgs);
80        } catch (SQLiteException e) {
81            Log.e(TAG, "Catch a SQLiteException when update: ", e);
82            checkSQLiteException(context, e);
83            return -1;
84        }
85    }
86
87    public static int delete(Context context, ContentResolver resolver, Uri uri,
88            String where, String[] selectionArgs) {
89        try {
90            return resolver.delete(uri, where, selectionArgs);
91        } catch (SQLiteException e) {
92            Log.e(TAG, "Catch a SQLiteException when delete: ", e);
93            checkSQLiteException(context, e);
94            return -1;
95        }
96    }
97
98    public static Uri insert(Context context, ContentResolver resolver,
99            Uri uri, ContentValues values) {
100        try {
101            return resolver.insert(uri, values);
102        } catch (SQLiteException e) {
103            Log.e(TAG, "Catch a SQLiteException when insert: ", e);
104            checkSQLiteException(context, e);
105            return null;
106        }
107    }
108}
109