| // Copyright 2018 The Feed Authors. |
| // |
| // 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.feed.common.functional; |
| |
| /** |
| * Interface which externalizes the action of committing a mutation from the class implementing the |
| * mutation. This is a common design pattern used to mutate the library components. The mutation |
| * builder will call a {@code Committer} to commit the accumulated changes. |
| * |
| * @param <R> The return value |
| * @param <C> A class containing the changes which will be committed. |
| */ |
| public interface Committer<R, C> { |
| /** Commit the change T, and optionally return a value R */ |
| R commit(C change); |
| } |
