| /* |
| * Copyright 2022 Google LLC |
| * |
| * 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 com.google.android.libraries.mobiledatadownload.populator; |
| |
| import static com.google.common.util.concurrent.Futures.immediateFuture; |
| |
| import com.google.common.base.Supplier; |
| import com.google.common.util.concurrent.ListenableFuture; |
| import com.google.mobiledatadownload.DownloadConfigProto.DataFileGroup; |
| import com.google.mobiledatadownload.DownloadConfigProto.ManifestConfig; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Proxy overrider used in the migration of ManifestFileGroupPopulator. |
| * |
| * <p>{@code flagSupplier} is used to determine whether the ManifestFileGroupPopulator is enabled. |
| * It is called every time a client calls refreshFileGroups. When it returns true, it calls {@code |
| * localeOverrider.override()}; when it returns false, it returns an empty list which makes the |
| * ManifestFileGroupPopulator not add any data file group to MDD. |
| */ |
| public final class MigrationProxyLocaleOverrider implements ManifestConfigOverrider { |
| private static final String TAG = "MigrationProxyLocaleOverrider"; |
| |
| private final Supplier<Boolean> flagSupplier; |
| private final LocaleOverrider localeOverrider; |
| |
| public MigrationProxyLocaleOverrider( |
| LocaleOverrider localeOverrider, Supplier<Boolean> flagSupplier) { |
| this.flagSupplier = flagSupplier; |
| this.localeOverrider = localeOverrider; |
| } |
| |
| @Override |
| public ListenableFuture<List<DataFileGroup>> override(ManifestConfig manifestConfig) { |
| if (flagSupplier.get()) { |
| return localeOverrider.override(manifestConfig); |
| } else { |
| return immediateFuture(new ArrayList<>()); |
| } |
| } |
| } |