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/*
* Copyright (C) 2017 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.multiwindowplayground.logger
import android.util.Log
/**
* Helper class which wraps Android's native Log utility in the Logger interface. This way
* normal DDMS output can be one of the many targets receiving and outputting logs simultaneously.
*/
class LogWrapper : LogNode {
// For piping: The next node to receive Log data after this one has done its work.
internal var next: LogNode? = null
/**
* Prints data out to the console using Android's native log mechanism.
*
* @param priority Log level of the data being logged. Verbose, Error, etc.
* @param tag Tag for for the log data. Can be used to organize log statements.
* @param msg The actual message to be logged. The actual message to be logged.
* @param tr If an exception was thrown, this can be sent along for the logging
* facilities to extract and print useful information.
*/
override fun println(priority: Int, tag: String?, msg: String, tr: Throwable?) {
// If an exception was provided, convert that exception to a usable string and attach
// it to the end of the msg method.
if (tr != null) msg.plus("\n${Log.getStackTraceString(tr)}")
// This is functionally identical to Log.x(tag, useMsg);
// For instance, if priority were Log.VERBOSE, this would be the same as Log.v(tag, useMsg)
Log.println(priority, tag, msg)
// If this isn't the last node in the chain, move things along.
next?.println(priority, tag, msg, tr)
}
}
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