1 /* 2 * Copyright (C) 2009 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 com.cooliris.media; 18 19 import java.util.ArrayList; 20 21 public interface DataSource { 22 // Load the sets to be displayed. 23 void loadMediaSets(final MediaFeed feed); 24 25 // rangeStart->rangeEnd is inclusive 26 // Pass in Shared.INFINITY for the rangeEnd to load all items. 27 void loadItemsForSet(final MediaFeed feed, final MediaSet parentSet, int rangeStart, int rangeEnd); 28 29 // Called when the data source will no longer be used. 30 void shutdown(); 31 32 boolean performOperation(int operation, ArrayList<MediaBucket> mediaBuckets, Object data); 33 34 DiskCache getThumbnailCache(); 35 36 // This method is called so that we can setup listeners for any databases that the datasource uses 37 String[] getDatabaseUris(); 38 39 // Called when the user explicitly requests a refresh, or when the application is brought to the foreground. 40 // Alternatively, when one or more of the database's data changes, this method will be called. 41 void refresh(final MediaFeed feed, final String[] databaseUris); 42 43 } 44
