1 /*
2 * Copyright (c) 2007, James Leigh All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * - Redistributions of source code must retain the above copyright notice, this
8 * list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 * - Neither the name of the openrdf.org nor the names of its contributors may
13 * be used to endorse or promote products derived from this software without
14 * specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
29 package org.openrdf.elmo.rolemapper;
30
31 import java.net.URL;
32 import java.util.Collection;
33 import java.util.Map;
34 import java.util.concurrent.ConcurrentHashMap;
35
36 import org.slf4j.Logger;
37 import org.slf4j.LoggerFactory;
38
39 /**
40 * Tracks recorded roles and maps them to their subject type.
41 *
42 * @author James Leigh
43 *
44 */
45 public class TypeMapper<URI> {
46
47 private final Logger logger = LoggerFactory.getLogger(TypeMapper.class);
48
49 private Map<Class<?>, URI> types;
50
51 public TypeMapper() {
52 types = new ConcurrentHashMap<Class<?>, URI>(256);
53 }
54
55 public Collection<URI> findTypes(Class<?> javaClass,
56 Collection<URI> rdfTypes) {
57 URI type = types.get(javaClass);
58 if (type != null) {
59 rdfTypes.add(type);
60 return rdfTypes;
61 }
62 Class<?> superclass = javaClass.getSuperclass();
63 if (superclass != null)
64 findTypes(superclass, rdfTypes);
65 Class<?>[] interfaces = javaClass.getInterfaces();
66 for (int i = 0, n = interfaces.length; i < n; i++) {
67 findTypes(interfaces[i], rdfTypes);
68 }
69 return rdfTypes;
70 }
71
72 /**
73 * Finds the rdf:Class<?> for this Java Class<?>.
74 *
75 * @param javaClass
76 * @return URI of the rdf:Class<?> for this Java Class<?> or null.
77 */
78 public URI findType(Class<?> role) {
79 return types.get(role);
80 }
81
82 public synchronized void recordRole(Class<?> role, URI rdfType) {
83 assert rdfType != null;
84 if (!types.containsKey(role)) {
85 types.put(role, rdfType);
86 if (logger.isDebugEnabled()) {
87 String sn = role.getSimpleName();
88 String cn = role.getName().replace('.', '/') + ".class";
89 ClassLoader cl = role.getClassLoader();
90 if (cl == null)
91 cl = Thread.currentThread().getContextClassLoader();
92 URL location = cl.getResource(cn);
93 logger.debug("Role {} loaded from {}", sn, location);
94 }
95 }
96 }
97 }