| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * 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.android.camera.async; |
| |
| import com.android.camera.util.Callback; |
| |
| /** |
| * Note: This interface, alone, does not provide a means of guaranteeing which |
| * thread the callback will be invoked on. Use |
| * {@link com.android.camera.async.ConcurrentState}, {@link BufferQueue}, or |
| * {@link java.util.concurrent.Future} instead to guarantee thread-safety. |
| */ |
| public interface Listenable<T> extends SafeCloseable { |
| /** |
| * Sets the callback, removing any existing callback first. |
| */ |
| public void setCallback(Callback<T> callback); |
| |
| /** |
| * Removes any existing callback. |
| */ |
| @Override |
| public void close(); |
| } |