diff options
Diffstat (limited to 'sources/hv-collector-utils/src/main/kotlin/org/onap/dcae/collectors/veshv/utils/commandline/ArgBasedConfiguration.kt')
-rw-r--r-- | sources/hv-collector-utils/src/main/kotlin/org/onap/dcae/collectors/veshv/utils/commandline/ArgBasedConfiguration.kt | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/sources/hv-collector-utils/src/main/kotlin/org/onap/dcae/collectors/veshv/utils/commandline/ArgBasedConfiguration.kt b/sources/hv-collector-utils/src/main/kotlin/org/onap/dcae/collectors/veshv/utils/commandline/ArgBasedConfiguration.kt new file mode 100644 index 00000000..b14f1be5 --- /dev/null +++ b/sources/hv-collector-utils/src/main/kotlin/org/onap/dcae/collectors/veshv/utils/commandline/ArgBasedConfiguration.kt @@ -0,0 +1,57 @@ +/* + * ============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 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 parseResult = Try { + val commandLineOptions = cmdLineOptionsList.map { it.option }.fold(Options(), Options::addOption) + parser.parse(commandLineOptions, args) + } + return parseResult + .toEither() + .mapLeft { ex -> WrongArgumentError(ex, cmdLineOptionsList) } + .map(this::getConfiguration) + .flatMap { + it.toEither { + WrongArgumentError( + message = "Unexpected error when parsing command line arguments", + cmdLineOptionsList = cmdLineOptionsList) + } + } + } + + protected abstract fun getConfiguration(cmdLine: CommandLine): Option<T> + + protected fun stringPathToPath(path: String): Path = Paths.get(File(path).toURI()) +} |