+++ /dev/null
-/*
- * 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.support.v2.widget;
-
-import android.database.Cursor;
-import android.widget.Filter;
-
-/**
- * <p>The CursorFilter delegates most of the work to the CursorAdapter.
- * Subclasses should override these delegate methods to run the queries
- * and convert the results into String that can be used by auto-completion
- * widgets.</p>
- */
-class CursorFilter extends Filter {
-
- CursorFilterClient mClient;
-
- interface CursorFilterClient {
- CharSequence convertToString(Cursor cursor);
- Cursor runQueryOnBackgroundThread(CharSequence constraint);
- Cursor getCursor();
- void changeCursor(Cursor cursor);
- }
-
- CursorFilter(CursorFilterClient client) {
- mClient = client;
- }
-
- @Override
- public CharSequence convertResultToString(Object resultValue) {
- return mClient.convertToString((Cursor) resultValue);
- }
-
- @Override
- protected FilterResults performFiltering(CharSequence constraint) {
- Cursor cursor = mClient.runQueryOnBackgroundThread(constraint);
-
- FilterResults results = new FilterResults();
- if (cursor != null) {
- results.count = cursor.getCount();
- results.values = cursor;
- } else {
- results.count = 0;
- results.values = null;
- }
- return results;
- }
-
- @Override
- protected void publishResults(CharSequence constraint, FilterResults results) {
- Cursor oldCursor = mClient.getCursor();
-
- if (results.values != null && results.values != oldCursor) {
- mClient.changeCursor((Cursor) results.values);
- }
- }
-}