Application.java

/*
 * Copyright (c) 2014 Villu Ruusmann
 *
 * This file is part of Openscoring
 *
 * Openscoring is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Openscoring is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with Openscoring.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.openscoring.client;

import com.beust.jcommander.JCommander;
import com.beust.jcommander.Parameter;
import com.beust.jcommander.ParameterException;

abstract
public class Application {

	@Parameter (
		names = {"--help"},
		description = "Show the list of configuration options and exit",
		help = true
	)
	private boolean help = false;


	abstract
	public void run() throws Exception;

	private boolean getHelp(){
		return this.help;
	}

	static
	public void run(Class<? extends Application> clazz, String... args) throws Exception {
		Application application = clazz.newInstance();

		JCommander commander = new JCommander(application);
		commander.setProgramName(clazz.getName());

		try {
			commander.parse(args);
		} catch(ParameterException pe){
			commander.usage();

			System.exit(-1);
		}

		if(application.getHelp()){
			commander.usage();

			System.exit(0);
		}

		application.run();
	}
}