GeneratorThread


1   /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
2    * JFlex 1.4.1                                                             *
3    * Copyright (C) 1998-2004  Gerwin Klein <lsf@jflex.de>                    *
4    * All rights reserved.                                                    *
5    *                                                                         *
6    * This program is free software; you can redistribute it and/or modify    *
7    * it under the terms of the GNU General Public License. See the file      *
8    * COPYRIGHT for more information.                                         *
9    *                                                                         *
10   * This program is distributed in the hope that it will be useful,         *
11   * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
13   * GNU General Public License for more details.                            *
14   *                                                                         *
15   * You should have received a copy of the GNU General Public License along *
16   * with this program; if not, write to the Free Software Foundation, Inc., *
17   * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA                 *
18   *                                                                         *
19   * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
20  
21  package JFlex.gui;
22  
23  import JFlex.*;
24  
25  import java.io.File  ;
26  
27  
28  /**
29   * Low priority thread for code generation (low priority 
30   * that gui has time for screen updates)
31   *
32   * @author Gerwin Klein
33   * @version JFlex 1.4.1, $Revision: 2.6 $, $Date: 2004/11/06 23:03:33 $
34   */
35  public class GeneratorThread extends Thread   {
36  
37    /** there must be at most one instance of this Thread running */
38      private static volatile boolean running = false;
39  
40      /** input file setting from GUI */
41      String    inputFile;
42  
43    /** output directory */
44    String   outputDir;
45    
46    /** main UI component, likes to be notified when generator finishes */
47    MainFrame parent;
48  
49      /**
50       * Create a new GeneratorThread, but do not run it yet.
51       * 
52       * @param parent      the frame, main UI component
53       * @param inputFile   input file from UI settings
54       * @param messages    where generator messages should appear
55       * @param outputDir   output directory from UI settings
56       */
57    public GeneratorThread(MainFrame parent, String   inputFile, 
58                           String   outputDir) {
59      this.parent    = parent;
60      this.inputFile = inputFile;
61      this.outputDir = outputDir;
62    }
63  
64  
65      /**
66       * Run the generator thread. Only one instance of it can run at any time.
67       */
68    public void run() {
69      if (running) {
70          Out.error(ErrorMessages.ALREADY_RUNNING);
71              parent.generationFinished(false);
72      }
73      else {
74          running = true;
75              setPriority(MIN_PRIORITY);    
76              try {
77          if (!outputDir.equals("")) {
78            Options.setDir(outputDir);
79          }
80                  Main.generate(new File  (inputFile));
81                  Out.statistics();
82                  parent.generationFinished(true);
83              }
84              catch (GeneratorException e) {
85                  Out.statistics();
86                  parent.generationFinished(false);
87              }
88        finally {
89          running = false;
90        }
91      }
92    }
93  }
94
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags