/**

  * 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);

 		}

 	}

 }