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 * An output stream of objects which can be closed from either the producer or 23 * the consumer. 24 */ 25 public interface BufferQueueController<T> extends Updatable<T>, SafeCloseable { 26 /** 27 * Adds the given element to the stream. Streams must support calling this 28 * even after closed. 29 * 30 * @param element The element to add. 31 */ 32 @Override 33 public void update(@Nonnull T element); 34 35 /** 36 * Closes the stream. Implementations must tolerate multiple calls to close. 37 */ 38 @Override 39 public void close(); 40 41 /** 42 * @return Whether the stream is closed. 43 */ 44 public boolean isClosed(); 45 } 46
