| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License |
| */ |
| |
| package android.database; |
| |
| import android.database.CrossProcessCursor; |
| import android.database.Cursor; |
| import android.database.CursorWindow; |
| import android.database.CursorWrapper; |
| |
| /** |
| * Cursor wrapper that implements {@link CrossProcessCursor}. |
| * <p> |
| * If the wrapped cursor implements {@link CrossProcessCursor}, then the wrapper |
| * delegates {@link #fillWindow}, {@link #getWindow()} and {@link #onMove} to it. |
| * Otherwise, the wrapper provides default implementations of these methods that |
| * traverse the contents of the cursor similar to {@link AbstractCursor#fillWindow}. |
| * </p><p> |
| * This wrapper can be used to adapt an ordinary {@link Cursor} into a |
| * {@link CrossProcessCursor}. |
| * </p> |
| */ |
| public class CrossProcessCursorWrapper extends CursorWrapper implements CrossProcessCursor { |
| /** |
| * Creates a cross process cursor wrapper. |
| * @param cursor The underlying cursor to wrap. |
| */ |
| public CrossProcessCursorWrapper(Cursor cursor) { |
| super(cursor); |
| } |
| |
| @Override |
| public void fillWindow(int position, CursorWindow window) { |
| if (mCursor instanceof CrossProcessCursor) { |
| final CrossProcessCursor crossProcessCursor = (CrossProcessCursor)mCursor; |
| crossProcessCursor.fillWindow(position, window); |
| return; |
| } |
| |
| DatabaseUtils.cursorFillWindow(mCursor, position, window); |
| } |
| |
| @Override |
| public CursorWindow getWindow() { |
| if (mCursor instanceof CrossProcessCursor) { |
| final CrossProcessCursor crossProcessCursor = (CrossProcessCursor)mCursor; |
| return crossProcessCursor.getWindow(); |
| } |
| |
| return null; |
| } |
| |
| @Override |
| public boolean onMove(int oldPosition, int newPosition) { |
| if (mCursor instanceof CrossProcessCursor) { |
| final CrossProcessCursor crossProcessCursor = (CrossProcessCursor)mCursor; |
| return crossProcessCursor.onMove(oldPosition, newPosition); |
| } |
| |
| return true; |
| } |
| } |