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/*
* ============LICENSE_START=======================================================
* dcaegen2-collectors-veshv
* ================================================================================
* Copyright (C) 2018 NOKIA
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.collectors.veshv.utils.commandline
import arrow.core.Either
import arrow.core.Option
import arrow.core.Try
import arrow.core.flatMap
import arrow.core.getOrElse
import org.apache.commons.cli.CommandLine
import org.apache.commons.cli.CommandLineParser
import org.apache.commons.cli.Options
import java.io.File
import java.nio.file.Path
import java.nio.file.Paths
abstract class ArgBasedConfiguration<T>(private val parser: CommandLineParser) {
abstract val cmdLineOptionsList: List<CommandLineOption>
fun parse(args: Array<out String>): Either<WrongArgumentError, T> {
val commandLineOptions = cmdLineOptionsList.map { it.option }.fold(Options(), Options::addOption)
val parseResult = Try {
parser.parse(commandLineOptions, args)
}
return parseResult
.toEither()
.mapLeft { ex -> WrongArgumentError(ex, commandLineOptions) }
.map(this::getConfiguration)
.flatMap {
it.toEither {
WrongArgumentError(
"Unexpected error when parsing command line arguments",
commandLineOptions)
}
}
}
protected abstract fun getConfiguration(cmdLine: CommandLine): Option<T>
protected fun CommandLine.longValue(cmdLineOpt: CommandLineOption, default: Long): Long =
longValue(cmdLineOpt).getOrElse { default }
protected fun CommandLine.stringValue(cmdLineOpt: CommandLineOption, default: String): String =
optionValue(cmdLineOpt).getOrElse { default }
protected fun CommandLine.intValue(cmdLineOpt: CommandLineOption): Option<Int> =
optionValue(cmdLineOpt).map(String::toInt)
private fun CommandLine.longValue(cmdLineOpt: CommandLineOption): Option<Long> =
optionValue(cmdLineOpt).map(String::toLong)
protected fun CommandLine.stringValue(cmdLineOpt: CommandLineOption): Option<String> =
optionValue(cmdLineOpt)
protected fun CommandLine.hasOption(cmdLineOpt: CommandLineOption): Boolean =
this.hasOption(cmdLineOpt.option.opt)
protected fun stringPathToPath(path: String): Path = Paths.get(File(path).toURI())
private fun CommandLine.optionValue(cmdLineOpt: CommandLineOption): Option<String> =
Option.fromNullable(getOptionValue(cmdLineOpt.option.opt))
}
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