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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.hardware.camera2.legacy;
import android.hardware.camera2.utils.CameraBinderDecorator;
import android.util.AndroidException;
/**
* Utility class containing exception handling used solely by the compatibility mode shim.
*/
public class LegacyExceptionUtils {
private static final String TAG = "LegacyExceptionUtils";
/**
* Checked exception thrown when a BufferQueue has been abandoned by its consumer.
*/
public static class BufferQueueAbandonedException extends AndroidException {
public BufferQueueAbandonedException () {}
public BufferQueueAbandonedException(String name) {
super(name);
}
public BufferQueueAbandonedException(String name, Throwable cause) {
super(name, cause);
}
public BufferQueueAbandonedException(Exception cause) {
super(cause);
}
}
/**
* Throw error codes used by legacy device methods as exceptions.
*
* <p>Non-negative return values are passed through, negative return values are thrown as
* exceptions.</p>
*
* @param errorFlag error to throw as an exception.
* @throws {@link BufferQueueAbandonedException} for {@link CameraBinderDecorator#ENODEV}.
* @throws {@link UnsupportedOperationException} for an unknown negative error code.
* @return {@code errorFlag} if the value was non-negative, throws otherwise.
*/
public static int throwOnError(int errorFlag) throws BufferQueueAbandonedException {
switch (errorFlag) {
case CameraBinderDecorator.NO_ERROR: {
return CameraBinderDecorator.NO_ERROR;
}
case CameraBinderDecorator.BAD_VALUE: {
throw new BufferQueueAbandonedException();
}
}
if (errorFlag < 0) {
throw new UnsupportedOperationException("Unknown error " + errorFlag);
}
return errorFlag;
}
private LegacyExceptionUtils() {
throw new AssertionError();
}
}
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