1/*
2 * Copyright (C) 2015 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
17package com.android.camera.device;
18
19import com.android.camera.async.Lifetime;
20import com.android.camera.async.SafeCloseable;
21import com.google.common.util.concurrent.ListenableFuture;
22
23/**
24 * Lifecycle for a single device from open to close.
25 */
26public interface SingleDeviceLifecycle<TDevice, TKey> extends SafeCloseable {
27    /**
28     * Get the camera device key for this lifecycle.
29     */
30    public TKey getId();
31
32    /**
33     * This should create a new request for each invocation and
34     * should cancel the previous request (assuming that the previous
35     * request has not been completed).
36     */
37    public ListenableFuture<TDevice> createRequest(Lifetime lifetime);
38
39    /**
40     * Tell this instance that it should attempt to get the device to
41     * an open and ready state.
42     */
43    public void open();
44}
45