jenerator.java

来自「一个java 代码生成器」· Java 代码 · 共 115 行

/**
 * Copyright (c) 2002, Siddhartha P. Chandurkar [e-mail]
 * All rights reserved.
 * Licensed under the Academic Free License version 1.1
 * See the file LICENSE.TXT for details.
 * LICENSE.txt is located in the directory  <install-directory>\Jenerator
 * of your Jenertaor Installation.
 *
 */
package com.jenerator;

//<Imports>

import com.jenerator.transformer.StrategyFactory;
import com.jenerator.transformer.StrategyNotFoundException;
import com.jenerator.transformer.TransformFailedException;
import com.jenerator.transformer.TransformStrategy;
import com.jenerator.util.ArgumentParser;
import com.jenerator.util.ConfigurationException;
import com.jenerator.util.Configurator;
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;

import java.io.File;
import java.util.Vector;

//</Imports>


/**
 * Jenerator
 * This is the main class of the Jenerator. The responsibility of this class is
 * to initialize the Jenerator, parse the command line arguments and invoke
 * the respective strategy class, invoke the transform  method on the strategies.
 *
 * @author Siddhartha P. Chandurkar
 * @version 0.9.0
 */
public class Jenerator {

    //ATTRBUTES
    //Log4j's logger
    private static Logger log = Logger.getLogger(com.jenerator.Jenerator.class.getName());

    //METHODS
    /**
     * The method should initialize all the things needed of the Jenerator
     * to function e.g. It intializes the JEN_HOME, Log4j and dynamically builds
     * the java classpath based on the libraries found in lib/ext.
     */
    private void init() throws InitializationFailedException {
        try {
            String jenHome = System.getProperty("JEN_HOME");
            if (jenHome == null)
                throw new JenHomeNotDefinedException();
            Configurator.getInstance().setJenHome(jenHome);
            PropertyConfigurator.configure(Configurator.getInstance().getJenHome() + File.separator + "config" + File.separator + "log4j.properties");
            log.info("Setting Classpath ... ");

            /** This code is for dynamic jar loading of jar from the lib/ext directory.
             * This has to be taken care in the next release.
             * new LoadResources().makeClasspath();
             */

        } catch (Exception e) {
            log.fatal("Initialization failed !!! " + e);
            throw new InitializationFailedException();
        }

    }//init()

    /**
     * main
     * The main method of the Application
     */
    public static void main(String args[]) {
        try {


            Jenerator jenerator = new Jenerator();
            //Parses the Arguments past to the main through the command line.
            ArgumentParser argParser = new ArgumentParser();
            argParser.parseArgs(args);
            //Initializes the Jenerator.
            jenerator.init();
            log.info("Jenerator generating ... ");
            log.info("Reading Configuration ... ");
            Configurator.getInstance().readConfiguration(argParser);
            log.info("Configuration reading done");
            StrategyFactory stratFact = new StrategyFactory();
            //Gets a collection of Strategies depending upon the values set
            //in the command line;
            Vector strategies = stratFact.getStrategies(argParser);
            for (int i = 0; i < strategies.size(); i++)
                ((TransformStrategy) strategies.elementAt(i)).transform();
            log.info("Generation Complete");

        } catch (TransformFailedException e) {
            e.printStackTrace();
            log.error(e, e);
        } catch (ConfigurationException e) {
            e.printStackTrace();
            log.error(e);
        } catch (StrategyNotFoundException e) {
            e.printStackTrace();
            log.error(e);
        } catch (Exception e) {
            e.printStackTrace();
            log.error(e);
        }

    }//main


}//Jenerator