/**
 * SPINdle (version 2.2.2)
 * Copyright (C) 2009-2012 NICTA Ltd.
 *
 * This file is part of SPINdle project.
 * 
 * SPINdle is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * SPINdle 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 Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with SPINdle.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @author H.-P. Lam (oleklam@gmail.com), National ICT Australia - Queensland Research Laboratory 
 */
package spindle.console.impl;

import java.util.List;

import spindle.console.CommandOption;
import spindle.console.ConsoleException;
import spindle.core.dom.Conclusion;
import spindle.core.dom.Theory;
import spindle.sys.ConfigurationException;

/**
 * Console command for application constants.
 * 
 * @author H.-P. Lam (oleklam@gmail.com), National ICT Australia - Queensland Research Laboratory
 * @since version 2.0.0
 * @since 2011.07.27
 * @version Last modified 2012.07.30
 */
public class AppConstants extends CommandBase {
	public static final String COMMAND_NAME = "appConstants";
	public static final String DESCRIPTION = "Show application constants";
	public static final String USAGE = "";

	private static spindle.core.dom.AppConstants appConstants = spindle.core.dom.AppConstants.getInstance(null);

	public AppConstants() {
		super(COMMAND_NAME, DESCRIPTION, USAGE);
		addOption(new CommandOption("@TODAY", "", "today"));
		addOption(new CommandOption("@DATE", "", "date as specified by user: @DATE(year,month,day,hour,minutes,second)"));
	}

	@Override
	public Object execute(Theory theory, List<Conclusion> conclusions, List<String> args) //
			throws ConfigurationException, ConsoleException { 
		return execute(null, theory, conclusions, args);
	}

	@Override
	public Object execute(String option, Theory theory, List<Conclusion> conclusions, List<String> args) //
			throws ConfigurationException, ConsoleException {
		String constantLabel = (null == option || "".equals(option.trim())) ? null : option.trim();
		appConstants.listAppConstant(constantLabel);
		return null;
	}
}