SQLiteDirectCursorDriver.java revision d606b4bf2c1a2308b40785860853cfb95a77bf58 
1/*
2 * Copyright (C) 2007 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.database.sqlite;
18
19import android.database.Cursor;
20import android.database.sqlite.SQLiteDatabase.CursorFactory;
21
22/**
23 * A cursor driver that uses the given query directly.
24 *
25 * @hide
26 */
27public class SQLiteDirectCursorDriver implements SQLiteCursorDriver {
28    private String mEditTable;
29    private SQLiteDatabase mDatabase;
30    private Cursor mCursor;
31    private String mSql;
32    private SQLiteQuery mQuery;
33
34    public SQLiteDirectCursorDriver(SQLiteDatabase db, String sql, String editTable) {
35        mDatabase = db;
36        mEditTable = editTable;
37        mSql = sql;
38    }
39
40    public Cursor query(CursorFactory factory, String[] selectionArgs) {
41        // Compile the query
42        SQLiteQuery query = new SQLiteQuery(mDatabase, mSql, 0, selectionArgs);
43
44        try {
45            // Arg binding
46            int numArgs = selectionArgs == null ? 0 : selectionArgs.length;
47            for (int i = 0; i < numArgs; i++) {
48                query.bindString(i + 1, selectionArgs[i]);
49            }
50
51            // Create the cursor
52            if (factory == null) {
53                mCursor = new SQLiteCursor(mDatabase, this, mEditTable, query);
54            } else {
55                mCursor = factory.newCursor(mDatabase, this, mEditTable, query);
56            }
57
58            mQuery = query;
59            query = null;
60            return mCursor;
61        } finally {
62            // Make sure this object is cleaned up if something happens
63            if (query != null) query.close();
64        }
65    }
66
67    public void cursorClosed() {
68        mCursor = null;
69    }
70
71    public void setBindArguments(String[] bindArgs) {
72        final int numArgs = bindArgs.length;
73        for (int i = 0; i < numArgs; i++) {
74            mQuery.bindString(i + 1, bindArgs[i]);
75        }
76    }
77
78    public void cursorDeactivated() {
79        // Do nothing
80    }
81
82    public void cursorRequeried(Cursor cursor) {
83        // Do nothing
84    }
85
86    @Override
87    public String toString() {
88        return "SQLiteDirectCursorDriver: " + mSql;
89    }
90}
91