org.jetbrains.kotlin.preprocessor.logging.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* 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 org.jetbrains.kotlin.preprocessor
interface Logger {
fun debug(msg: CharSequence)
fun info(msg: CharSequence)
fun warn(msg: CharSequence)
fun error(msg: CharSequence)
}
object SystemOutLogger : Logger {
private fun out(level: String, msg: CharSequence) = println("[$level] $msg")
var isDebugEnabled: Boolean = true
override fun debug(msg: CharSequence) {
if (isDebugEnabled) out("DEBUG", msg)
}
override fun info(msg: CharSequence) = out("INFO", msg)
override fun warn(msg: CharSequence) = out("WARN", msg)
override fun error(msg: CharSequence) = out("ERROR", msg)
}
fun Logger.withPrefix(prefix: String): Logger = PrefixedLogger(prefix, this)
class PrefixedLogger(val prefix: String, val logger: Logger) : Logger {
private fun prefix(msg: CharSequence): CharSequence = StringBuilder().apply {
append(prefix)
append(": ")
append(msg)
}
override fun debug(msg: CharSequence) = logger.debug(prefix(msg))
override fun info(msg: CharSequence) = logger.info(prefix(msg))
override fun warn(msg: CharSequence) = logger.warn(prefix(msg))
override fun error(msg: CharSequence) = logger.error(prefix(msg))
}