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/*
* Copyright (C) 2012 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 com.android.ex.camera2.portability;
import android.os.Handler;
/**
* A handler for all camera api runtime exceptions.
* The default behavior is to throw the runtime exception.
*/
public class CameraExceptionHandler {
private Handler mHandler;
private CameraExceptionCallback mCallback =
new CameraExceptionCallback() {
@Override
public void onCameraError(int errorCode) {
}
@Override
public void onCameraException(
RuntimeException e, String commandHistory, int action, int state) {
throw e;
}
@Override
public void onDispatchThreadException(RuntimeException e) {
throw e;
}
};
/**
* A callback helps to handle RuntimeException thrown by camera framework.
*/
public static interface CameraExceptionCallback {
public void onCameraError(int errorCode);
public void onCameraException(
RuntimeException e, String commandHistory, int action, int state);
public void onDispatchThreadException(RuntimeException e);
}
/**
* Construct a new instance of {@link CameraExceptionHandler} with a custom callback which will
* be executed on a specific {@link Handler}.
*
* @param callback The callback which will be invoked.
* @param handler The handler in which the callback will be invoked in.
*/
public CameraExceptionHandler(CameraExceptionCallback callback, Handler handler) {
mHandler = handler;
mCallback = callback;
}
/**
* Construct a new instance of {@link CameraExceptionHandler} with a default callback which will
* be executed on a specific {@link Handler}.
*
* @param handler The handler in which the default callback will be invoked in.
*/
public CameraExceptionHandler(Handler handler) {
mHandler = handler;
}
/**
* Invoke @{link CameraExceptionCallback} when an error is reported by Android camera framework.
*
* @param errorCode An integer to represent the error code.
* @see android.hardware.Camera#setErrorCallback(android.hardware.Camera.ErrorCallback)
*/
public void onCameraError(final int errorCode) {
mHandler.post(new Runnable() {
@Override
public void run() {
mCallback.onCameraError(errorCode);
}
});
}
/**
* Invoke @{link CameraExceptionCallback} when a runtime exception is thrown by Android camera
* framework.
*
* @param ex The runtime exception object.
*/
public void onCameraException(
final RuntimeException ex, final String commandHistory,
final int action, final int state) {
mHandler.post(new Runnable() {
@Override
public void run() {
mCallback.onCameraException(ex, commandHistory, action, state);
}
});
}
/**
* Invoke @{link CameraExceptionCallback} when a runtime exception is thrown by
* @{link DispatchThread}.
*
* @param ex The runtime exception object.
*/
public void onDispatchThreadException(final RuntimeException ex) {
mHandler.post(new Runnable() {
@Override
public void run() {
mCallback.onDispatchThreadException(ex);
}
});
}
}
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