ModifiableClassLoaderRepository


1   /*
2    * Copyright (C) The MX4J Contributors.
3    * All rights reserved.
4    *
5    * This software is distributed under the terms of the MX4J License version 1.0.
6    * See the terms of the MX4J License in the documentation provided with this software.
7    */
8   
9   package mx4j.server;
10  
11  import javax.management.loading.ClassLoaderRepository  ;
12  
13  /**
14   * Base class to extend to create custom ClassLoaderRepositories.
15   * MX4J's MBeanServer can use a custom ClassLoaderRepository instead of the default one
16   * by simply specifying a suitable system property, see {@link mx4j.MX4JSystemKeys}.
17   * It must be a class, otherwise it opens up a security hole, as anyone can cast the MBeanServer's
18   * ClassLoaderRepository down to this class and call addClassLoader or removeClassLoader
19   * since, if this class is an interface, they must be public.
20   *
21   * @version $Revision: 1.4 $
22   */
23  public abstract class ModifiableClassLoaderRepository implements ClassLoaderRepository  
24  {
25     /**
26      * Adds, if does not already exist, the specified ClassLoader to this repository.
27      *
28      * @param cl The classloader to add
29      * @see #removeClassLoader
30      */
31     protected abstract void addClassLoader(ClassLoader   cl);
32  
33     /**
34      * Removes, if exists, the specified ClassLoader from this repository.
35      *
36      * @param cl The classloader to remove
37      * @see #addClassLoader
38      */
39     protected abstract void removeClassLoader(ClassLoader   cl);
40  }
41

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