1 /* 2 * Copyright 2022 Google LLC 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 package com.google.android.libraries.mobiledatadownload.file.integration.downloader; 17 18 import android.net.Uri; 19 import com.google.android.downloader.DownloadMetadata; 20 import com.google.common.base.Optional; 21 import com.google.common.util.concurrent.ListenableFuture; 22 23 /** Storage mechanism for DownloadMetadata. */ 24 public interface DownloadMetadataStore { 25 /** Returns the DownloadMetadata associated with {@code uri} if it exists. */ read(Uri uri)26 ListenableFuture<Optional<DownloadMetadata>> read(Uri uri); 27 28 /** Inserts or updates the {@code metadata} associated with {@code uri}. */ upsert(Uri uri, DownloadMetadata metadata)29 ListenableFuture<Void> upsert(Uri uri, DownloadMetadata metadata); 30 31 /** Deletes the DownloadMetadata associated with {@code uri} if it exists. */ delete(Uri uri)32 ListenableFuture<Void> delete(Uri uri); 33 } 34