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      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 
     17 package android.database.sqlite;
     18 
     19 import android.annotation.TestApi;
     20 import android.database.Cursor;
     21 import android.database.sqlite.SQLiteDatabase.CursorFactory;
     22 import android.os.CancellationSignal;
     23 
     24 /**
     25  * A cursor driver that uses the given query directly.
     26  *
     27  * @hide
     28  */
     29 @TestApi
     30 public final class SQLiteDirectCursorDriver implements SQLiteCursorDriver {
     31     private final SQLiteDatabase mDatabase;
     32     private final String mEditTable;
     33     private final String mSql;
     34     private final CancellationSignal mCancellationSignal;
     35     private SQLiteQuery mQuery;
     36 
     37     public SQLiteDirectCursorDriver(SQLiteDatabase db, String sql, String editTable,
     38             CancellationSignal cancellationSignal) {
     39         mDatabase = db;
     40         mEditTable = editTable;
     41         mSql = sql;
     42         mCancellationSignal = cancellationSignal;
     43     }
     44 
     45     public Cursor query(CursorFactory factory, String[] selectionArgs) {
     46         final SQLiteQuery query = new SQLiteQuery(mDatabase, mSql, mCancellationSignal);
     47         final Cursor cursor;
     48         try {
     49             query.bindAllArgsAsStrings(selectionArgs);
     50 
     51             if (factory == null) {
     52                 cursor = new SQLiteCursor(this, mEditTable, query);
     53             } else {
     54                 cursor = factory.newCursor(mDatabase, this, mEditTable, query);
     55             }
     56         } catch (RuntimeException ex) {
     57             query.close();
     58             throw ex;
     59         }
     60 
     61         mQuery = query;
     62         return cursor;
     63     }
     64 
     65     public void cursorClosed() {
     66         // Do nothing
     67     }
     68 
     69     public void setBindArguments(String[] bindArgs) {
     70         mQuery.bindAllArgsAsStrings(bindArgs);
     71     }
     72 
     73     public void cursorDeactivated() {
     74         // Do nothing
     75     }
     76 
     77     public void cursorRequeried(Cursor cursor) {
     78         // Do nothing
     79     }
     80 
     81     @Override
     82     public String toString() {
     83         return "SQLiteDirectCursorDriver: " + mSql;
     84     }
     85 }
     86