01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.cocoon.components.classloader;
18:
19: import org.apache.avalon.framework.component.Component;
20:
21: import java.io.File;
22: import java.io.IOException;
23:
24: /**
25: * A class loader manager acting as a proxy for a <b>single</b>
26: * <code>RepositoryClassLoader</code>.
27: * This class guarantees that a single class loader instance exists so
28: * that it can be safely reinstantiated for dynamic class reloading
29: *
30: * @author <a href="mailto:ricardo@apache.org">Ricardo Rocha</a>
31: * @version CVS $Id: ClassLoaderManager.java 433543 2006-08-22 06:22:54Z crossley $
32: */
33: public interface ClassLoaderManager extends Component {
34:
35: String ROLE = ClassLoaderManager.class.getName();
36:
37: /**
38: * Add a directory to the proxied class loader
39: *
40: * @param directoryName The repository name
41: * @exception IOException If the directory is invalid
42: */
43: void addDirectory(File directoryName) throws IOException;
44:
45: /**
46: * Load a class through the proxied class loader
47: *
48: * @param className The name of the class to be loaded
49: * @return The loaded class
50: * @exception ClassNotFoundException If the class is not found
51: */
52: Class loadClass(String className) throws ClassNotFoundException;
53:
54: /**
55: * Reinstantiate the proxied class loader to allow for class reloading
56: *
57: */
58: void reinstantiate();
59: }
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