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.one.v2.initialization;
18 
19 import com.android.camera.one.OneCamera;
20 import com.android.camera.one.v2.photo.PictureTaker;
21 import com.android.camera.session.CaptureSession;
22 
23 import java.util.concurrent.CancellationException;
24 import java.util.concurrent.ExecutionException;
25 import java.util.concurrent.Future;
26 
27 /**
28  * A {@link PictureTaker} on which {@link #takePicture} may be called even if
29  * the underlying camera is not yet ready.
30  */
31 class DeferredPictureTaker implements PictureTaker {
32     private final Future<PictureTaker> mPictureTakerFuture;
33 
DeferredPictureTaker(Future<PictureTaker> pictureTakerFuture)34     public DeferredPictureTaker(Future<PictureTaker> pictureTakerFuture) {
35         mPictureTakerFuture = pictureTakerFuture;
36     }
37 
38     @Override
takePicture(OneCamera.PhotoCaptureParameters params, CaptureSession session)39     public void takePicture(OneCamera.PhotoCaptureParameters params, CaptureSession session) {
40         if (mPictureTakerFuture.isDone()) {
41             try {
42                 PictureTaker taker = mPictureTakerFuture.get();
43                 taker.takePicture(params, session);
44             } catch (InterruptedException | ExecutionException | CancellationException e) {
45                 return;
46             }
47         }
48     }
49 }
50