| /* |
| * Copyright (C) 2014 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.support.v17.leanback.database; |
| |
| import android.database.Cursor; |
| |
| /** |
| * Abstract class used to convert the current {@link Cursor} row to a single |
| * object. |
| */ |
| public abstract class CursorMapper { |
| |
| private Cursor mCursor; |
| |
| /** |
| * Called once when the associated {@link Cursor} is changed. A subclass |
| * should bind column indexes to column names in this method. This method is |
| * not intended to be called outside of CursorMapper. |
| */ |
| protected abstract void bindColumns(Cursor cursor); |
| |
| /** |
| * A subclass should implement this method to create a single object using |
| * binding information. This method is not intended to be called |
| * outside of CursorMapper. |
| */ |
| protected abstract Object bind(Cursor cursor); |
| |
| /** |
| * Convert a {@link Cursor} at its current position to an Object. |
| */ |
| public Object convert(Cursor cursor) { |
| if (cursor != mCursor) { |
| mCursor = cursor; |
| bindColumns(mCursor); |
| } |
| return bind(mCursor); |
| } |
| } |