1 // ========================================================================
2 // Copyright (c) 2006-2009 Mort Bay Consulting Pty. Ltd.
3 // ------------------------------------------------------------------------
4 // All rights reserved. This program and the accompanying materials
5 // are made available under the terms of the Eclipse Public License v1.0
6 // and Apache License v2.0 which accompanies this distribution.
7 // The Eclipse Public License is available at
8 // http://www.eclipse.org/legal/epl-v10.html
9 // The Apache License v2.0 is available at
10 // http://www.opensource.org/licenses/apache2.0.php
11 // You may elect to redistribute this code under either of these licenses.
12 // ========================================================================
13
14 package org.eclipse.jetty.annotations;
15
16 import java.util.List;
17
18 import org.eclipse.jetty.annotations.AnnotationParser.ClassHandler;
19 import org.eclipse.jetty.util.MultiMap;
20 import org.eclipse.jetty.util.log.Log;
21
22 /**
23 * ClassInheritanceHandler
24 *
25 * As asm scans for classes, remember the type hierarchy.
26 */
27 public class ClassInheritanceHandler implements ClassHandler
28 {
29
30 MultiMap _inheritanceMap = new MultiMap();
31
32 public ClassInheritanceHandler()
33 {
34 }
35
36 public void handle(String className, int version, int access, String signature, String superName, String[] interfaces)
37 {
38 try
39 {
40 for (int i=0; interfaces != null && i<interfaces.length;i++)
41 {
42 _inheritanceMap.add (interfaces[i], className);
43 }
44 //To save memory, we don't record classes that only extend Object, as that can be assumed
45 if (!"java.lang.Object".equals(superName))
46 _inheritanceMap.add(superName, className);
47 }
48 catch (Exception e)
49 {
50 Log.warn(e);
51 }
52 }
53
54 public List getClassNamesExtendingOrImplementing (String className)
55 {
56 return _inheritanceMap.getValues(className);
57 }
58
59 public MultiMap getMap ()
60 {
61 return _inheritanceMap;
62 }
63 }