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