1 /* 2 * Copyright (C) 2014 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.android.camera.async; 18 19 import javax.annotation.Nonnull; 20 21 /** 22 * This provides empty, NoOp implementation of generic updateable objects. 23 */ 24 public final class Updatables { 25 private static final Updatable NOOP = new Updatable() { 26 @Override 27 public void update(@Nonnull Object o) { 28 // Do nothing. 29 } 30 }; 31 Updatables()32 private Updatables() { 33 } 34 getNoOp()35 public static <T> Updatable<T> getNoOp() { 36 return NOOP; 37 } 38 } 39