/**

 * Alt2XML

 * Copyright © 2014 František Kučera (frantovo.cz)

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. If not, see <http://www.gnu.org/licenses/>.

 */

package cz.frantovo.alt2xml.cli;

import cz.frantovo.alt2xml.out.Action;

import cz.frantovo.alt2xml.out.ActionContext;

import cz.frantovo.alt2xml.out.ActionFactory;

import java.io.File;

import java.io.OutputStream;

import java.util.Arrays;

import java.util.HashMap;

import java.util.Map;

import java.util.ServiceLoader;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.xml.parsers.SAXParser;

import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.ext.LexicalHandler;

import org.xml.sax.helpers.DefaultHandler;

/**

 *

 * @author Ing. František Kučera (frantovo.cz)

 */

public class CLI {

	public static final String LEXICAL_HANDLER_PROPERTY = "http://xml.org/sax/properties/lexical-handler";

	private static final Logger log = Logger.getLogger(CLI.class.getName());

	public static void main(String[] args) {

		try {

			File vstup = new File(args[0]);

			String actionCode = args[1];

			OutputStream outputStream = System.out;

			Map<String, ActionFactory> actionFactories = new HashMap<>();

			for (ActionFactory f : ServiceLoader.load(ActionFactory.class)) {

				String code = f.getActionCode();

				actionFactories.put(code, f);

				log.log(Level.CONFIG, "Discovered output module: {0} = {1}", new Object[]{code, f.getClass().getName()});

			}

			ActionFactory actionFactory = actionFactories.get(actionCode);

			if (actionFactory == null) {

				log.log(Level.SEVERE, "No such output action with code: {0}", actionCode);

			} else {

				ActionContext actionContext = new ActionContext(outputStream);

				Action action = actionFactory.getAction(actionContext);

				DefaultHandler defaultHandler = action.getDefaultHandler();

				LexicalHandler lexicalHandler = action.getLexicalHandler();

				SAXParserFactory t = SAXParserFactory.newInstance();

				SAXParser p = t.newSAXParser();

				if (lexicalHandler == null) {

					log.log(Level.FINE, "No LexicalHandler provided.");

				} else {

					try {

						p.setProperty(LEXICAL_HANDLER_PROPERTY, defaultHandler);

					} catch (Exception e) {

						log.log(Level.WARNING, "LexicalHandler registration exception:", e);

						log.log(Level.WARNING,

								"Tried to register the handler {0} as a LexicalHandler but LexicalHandlers are not supported by the parser {1}",

								new Object[]{defaultHandler, p});

					}

				}

				p.parse(vstup, defaultHandler);

			}

		} catch (Exception e) {

			log.log(Level.SEVERE, "Error during processing: " + Arrays.toString(args), e);

		}

	}

}