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 android.hardware.camera2.legacy; 18 19 import android.hardware.camera2.utils.CameraBinderDecorator; 20 import android.util.AndroidException; 21 22 /** 23 * Utility class containing exception handling used solely by the compatibility mode shim. 24 */ 25 public class LegacyExceptionUtils { 26 private static final String TAG = "LegacyExceptionUtils"; 27 28 /** 29 * Checked exception thrown when a BufferQueue has been abandoned by its consumer. 30 */ 31 public static class BufferQueueAbandonedException extends AndroidException { 32 public BufferQueueAbandonedException () {} 33 34 public BufferQueueAbandonedException(String name) { 35 super(name); 36 } 37 38 public BufferQueueAbandonedException(String name, Throwable cause) { 39 super(name, cause); 40 } 41 42 public BufferQueueAbandonedException(Exception cause) { 43 super(cause); 44 } 45 } 46 47 /** 48 * Throw error codes used by legacy device methods as exceptions. 49 * 50 * <p>Non-negative return values are passed through, negative return values are thrown as 51 * exceptions.</p> 52 * 53 * @param errorFlag error to throw as an exception. 54 * @throws {@link BufferQueueAbandonedException} for {@link CameraBinderDecorator#ENODEV}. 55 * @throws {@link UnsupportedOperationException} for an unknown negative error code. 56 * @return {@code errorFlag} if the value was non-negative, throws otherwise. 57 */ 58 public static int throwOnError(int errorFlag) throws BufferQueueAbandonedException { 59 switch (errorFlag) { 60 case CameraBinderDecorator.NO_ERROR: { 61 return CameraBinderDecorator.NO_ERROR; 62 } 63 case CameraBinderDecorator.ENODEV: { 64 throw new BufferQueueAbandonedException(); 65 } 66 } 67 68 if (errorFlag < 0) { 69 throw new UnsupportedOperationException("Unknown error " + errorFlag); 70 } 71 return errorFlag; 72 } 73 74 private LegacyExceptionUtils() { 75 throw new AssertionError(); 76 } 77 } 78
