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 
17 package com.android.camera.device;
18 
19 import com.android.camera.async.Lifetime;
20 import com.android.camera.async.SafeCloseable;
21 import com.google.common.util.concurrent.ListenableFuture;
22 
23 /**
24  * Lifecycle for a single device from open to close.
25  */
26 public interface SingleDeviceLifecycle<TDevice, TKey> extends SafeCloseable {
27     /**
28      * Get the camera device key for this lifecycle.
29      */
getId()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      */
createRequest(Lifetime lifetime)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      */
open()43     public void open();
44 }
45