1 //
2 // ========================================================================
3 // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.annotations;
20
21 import java.util.concurrent.ConcurrentHashMap;
22
23 import org.eclipse.jetty.annotations.AnnotationParser.AbstractHandler;
24 import org.eclipse.jetty.annotations.AnnotationParser.ClassInfo;
25 import org.eclipse.jetty.util.ConcurrentHashSet;
26 import org.eclipse.jetty.util.log.Log;
27 import org.eclipse.jetty.util.log.Logger;
28
29 /**
30 * ClassInheritanceHandler
31 *
32 * As asm scans for classes, remember the type hierarchy.
33 */
34 public class ClassInheritanceHandler extends AbstractHandler
35 {
36 private static final Logger LOG = Log.getLogger(ClassInheritanceHandler.class);
37
38 ConcurrentHashMap<String, ConcurrentHashSet<String>> _inheritanceMap;
39
40
41 public ClassInheritanceHandler(ConcurrentHashMap<String, ConcurrentHashSet<String>> map)
42 {
43 _inheritanceMap = map;
44 }
45
46 public void handle(ClassInfo classInfo)
47 {
48 try
49 {
50 for (int i=0; classInfo.getInterfaces() != null && i < classInfo.getInterfaces().length;i++)
51 {
52 addToInheritanceMap(classInfo.getInterfaces()[i], classInfo.getClassName());
53 //_inheritanceMap.add (classInfo.getInterfaces()[i], classInfo.getClassName());
54 }
55 //To save memory, we don't record classes that only extend Object, as that can be assumed
56 if (!"java.lang.Object".equals(classInfo.getSuperName()))
57 {
58 addToInheritanceMap(classInfo.getSuperName(), classInfo.getClassName());
59 //_inheritanceMap.add(classInfo.getSuperName(), classInfo.getClassName());
60 }
61 }
62 catch (Exception e)
63 {
64 LOG.warn(e);
65 }
66 }
67
68 private void addToInheritanceMap (String interfaceOrSuperClassName, String implementingOrExtendingClassName)
69 {
70
71 //As it is likely that the interfaceOrSuperClassName is already in the map, try getting it first
72 ConcurrentHashSet<String> implementingClasses = _inheritanceMap.get(interfaceOrSuperClassName);
73 //If it isn't in the map, then add it in, but test to make sure that someone else didn't get in
74 //first and add it
75 if (implementingClasses == null)
76 {
77 implementingClasses = new ConcurrentHashSet<String>();
78 ConcurrentHashSet<String> tmp = _inheritanceMap.putIfAbsent(interfaceOrSuperClassName, implementingClasses);
79 if (tmp != null)
80 implementingClasses = tmp;
81 }
82
83 implementingClasses.add(implementingOrExtendingClassName);
84 }
85 }