source: other-projects/rsyntax-textarea/devel-packages/jflex-1.4.3/src/JFlex/gui/GeneratorThread.java@ 25584

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * JFlex 1.4.3                                                             *
 * Copyright (C) 1998-2009  Gerwin Klein <[email protected]>                    *
 * All rights reserved.                                                    *
 *                                                                         *
 * This program is free software; you can redistribute it and/or modify    *
 * it under the terms of the GNU General Public License. See the file      *
 * COPYRIGHT for more information.                                         *
 *                                                                         *
 * 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, write to the Free Software Foundation, Inc., *
 * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA                 *
 *                                                                         *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

package JFlex.gui;

import JFlex.*;

import java.io.File;


/**
 * Low priority thread for code generation (low priority 
 * that gui has time for screen updates)
 *
 * @author Gerwin Klein
 * @version JFlex 1.4.3, $Revision: 433 $, $Date: 2009-01-31 19:52:34 +1100 (Sat, 31 Jan 2009) $
 */
public class GeneratorThread extends Thread {

  /** there must be at most one instance of this Thread running */
    private static volatile boolean running = false;

    /** input file setting from GUI */
    String  inputFile;

  /** output directory */
  String outputDir;
  
  /** main UI component, likes to be notified when generator finishes */
  MainFrame parent;

    /**
     * Create a new GeneratorThread, but do not run it yet.
     * 
     * @param parent      the frame, main UI component
     * @param inputFile   input file from UI settings
     * @param messages    where generator messages should appear
     * @param outputDir   output directory from UI settings
     */
  public GeneratorThread(MainFrame parent, String inputFile, 
                         String outputDir) {
    this.parent    = parent;
    this.inputFile = inputFile;
    this.outputDir = outputDir;
  }


    /**
     * Run the generator thread. Only one instance of it can run at any time.
     */
  public void run() {
    if (running) {
        Out.error(ErrorMessages.ALREADY_RUNNING);
            parent.generationFinished(false);
    }
    else {
        running = true;
            setPriority(MIN_PRIORITY);    
            try {
        if (!outputDir.equals("")) {
          Options.setDir(outputDir);
        }
                Main.generate(new File(inputFile));
                Out.statistics();
                parent.generationFinished(true);
            }
            catch (GeneratorException e) {
                Out.statistics();
                parent.generationFinished(false);
            }
      finally {
        running = false;
      }
    }
  }
}