ClassLoaderManager


1   /*
2    * Copyright 1999-2004 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.cocoon.components.classloader;
17  
18  import org.apache.avalon.framework.component.Component;
19  
20  import java.io.File  ;
21  import java.io.IOException  ;
22  
23  /**
24   * A class loader manager acting as a proxy for a <b>single</b>
25   * <code>RepositoryClassLoader</code>.
26   * This class guarantees that a single class loader instance exists so
27   * that it can be safely reinstantiated for dynamic class reloading
28   *
29   * @author <a HREF="mailto:ricardo@apache.org">Ricardo Rocha</a>
30   * @version CVS $Id: ClassLoaderManager.java 30932 2004-07-29 17:35:38Z vgritsenko $
31   */
32  public interface ClassLoaderManager extends Component {
33  
34      String   ROLE = ClassLoaderManager.class.getName();
35  
36      /**
37      * Add a directory to the proxied class loader
38      *
39      * @param directoryName The repository name
40      * @exception IOException If the directory is invalid
41      */
42      void addDirectory(File   directoryName) throws IOException  ;
43  
44      /**
45      * Load a class through the proxied class loader
46      *
47      * @param className The name of the class to be loaded
48      * @return The loaded class
49      * @exception ClassNotFoundException If the class is not found
50      */
51      Class   loadClass(String   className) throws ClassNotFoundException  ;
52  
53      /**
54      * Reinstantiate the proxied class loader to allow for class reloading
55      *
56      */
57      void reinstantiate();
58  }
59
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