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 java.util.concurrent.CancellationException;
20 import java.util.concurrent.ExecutionException;
21 import java.util.concurrent.Future;
22 
23 import com.android.camera.one.v2.autofocus.ManualAutoFocus;
24 
25 /**
26  * A {@link ManualAutoFocus} on which {@link #triggerFocusAndMeterAtPoint} may
27  * be called even if the underlying camera is not yet ready.
28  */
29 class DeferredManualAutoFocus implements ManualAutoFocus {
30     private final Future<ManualAutoFocus> mManualAutoFocusFuture;
31 
DeferredManualAutoFocus(Future<ManualAutoFocus> manualAutoFocusFuture)32     public DeferredManualAutoFocus(Future<ManualAutoFocus> manualAutoFocusFuture) {
33         mManualAutoFocusFuture = manualAutoFocusFuture;
34     }
35 
36     @Override
triggerFocusAndMeterAtPoint(float nx, float ny)37     public void triggerFocusAndMeterAtPoint(float nx, float ny) {
38         if (mManualAutoFocusFuture.isDone()) {
39             try {
40                 ManualAutoFocus af = mManualAutoFocusFuture.get();
41                 af.triggerFocusAndMeterAtPoint(nx, ny);
42             } catch (InterruptedException | ExecutionException | CancellationException e) {
43                 // If the {@link Future} is not ready, do nothing.
44                 return;
45             }
46         }
47     }
48 }
49