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GEARS Runtime Runner

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package com.xlrit.gears.runner;

import java.io.IOException;
import java.io.InputStream;

import com.google.common.base.Preconditions;
import com.xlrit.gears.runner.driver.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@SuppressWarnings({"rawtypes", "unchecked"})
public class Main {
	private static final Logger LOG = LoggerFactory.getLogger(Main.class);

	public static void main(String[] args) {
		// configure JUL to reduce log spam
		try (InputStream inputStream = Main.class.getResourceAsStream("/logging.properties");) {
			java.util.logging.LogManager.getLogManager().readConfiguration(inputStream);
		}
		catch (IOException e) {
			java.util.logging.Logger.getAnonymousLogger().severe("Could not load default logging.properties file");
			java.util.logging.Logger.getAnonymousLogger().severe(e.getMessage());
		}

		Driver driver = getDriver(args);
		Config config = handleArgs(args);
		LOG.info("Configured with {}", config);
		int failCount = driver.run(config);

		System.exit(-failCount);
	}

	private static Driver getDriver(String[] args) {
		return switch (args[0]) {
			case "run"    -> new RunDriver();
			case "load"   -> new LoadDriver();
			case "export" -> new ExportDriver();
			case "eval"   -> new EvalDriver();
			default -> throw new IllegalArgumentException("Unknown command: " + args[0]);
		};
	}

	private static Config handleArgs(String[] args) {
		Preconditions.checkArgument(args.length >= 1, "No command supplied");
		Preconditions.checkArgument(args.length >= 2, "No pattern supplied");
		LOG.info("Perform command {} with pattern {}", args[0], args[1]);
		Config config = switch (args[0]) {
			case "run"    -> new RunConfig();
			case "load"   -> new LoadConfig();
			case "export" -> new ExportConfig();
			case "eval"   -> new Config();
			default -> throw new IllegalArgumentException("Unknown command: " + args[0]);
		};
		config.readArgs(args);
		return config;
	}
}