ClassEnhancer


1   /*
2    * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3    *
4    * This file is part of Resin(R) Open Source
5    *
6    * Each copy or derived work must preserve the copyright notice and this
7    * notice unmodified.
8    *
9    * Resin Open Source is free software; you can redistribute it and/or modify
10   * it under the terms of the GNU General Public License as published by
11   * the Free Software Foundation; either version 2 of the License, or
12   * (at your option) any later version.
13   *
14   * Resin Open Source is distributed in the hope that it will be useful,
15   * but WITHOUT ANY WARRANTY; without even the implied warranty of
16   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17   * of NON-INFRINGEMENT.  See the GNU General Public License for more
18   * details.
19   *
20   * You should have received a copy of the GNU General Public License
21   * along with Resin Open Source; if not, write to the
22   *
23   *   Free Software Foundation, Inc.
24   *   59 Temple Place, Suite 330
25   *   Boston, MA 02111-1307  USA
26   *
27   * @author Scott Ferguson
28   */
29  
30  package com.caucho.loader.enhancer;
31  
32  import com.caucho.bytecode.JClass;
33  import com.caucho.bytecode.JavaClass;
34  import com.caucho.java.gen.GenClass;
35  
36  /**
37   * Interface for a class enhancer.
38   */
39  public interface ClassEnhancer {
40    /**
41     * Returns true if the class will be enhanced.
42     */
43    public boolean shouldEnhance(String   className);
44  
45    /**
46     * Fixups for the pre-enhancement class.
47     */
48    public void preEnhance(JavaClass baseClass)
49      throws Exception  ;
50  
51    /**
52     * Enhances the class by adding to the GenClass.
53     */
54    public void enhance(GenClass genClass,
55                JClass baseClass,
56                String   extClassName)
57      throws Exception  ;
58    
59    /**
60     * Any post compilation fixups.
61     */
62    public void postEnhance(JavaClass extClass)
63      throws Exception  ;
64  }
65
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