1 /**
2 * Copyright 2004-2013 The Kuali Foundation
3 *
4 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
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.kuali.student.contract.model.util;
17
18 import javax.xml.bind.annotation.XmlEnum;
19
20 import org.slf4j.Logger;
21 import org.slf4j.LoggerFactory;
22
23 import com.thoughtworks.qdox.model.Annotation;
24 import com.thoughtworks.qdox.model.JavaClass;
25 import com.thoughtworks.qdox.model.annotation.AnnotationValue;
26
27 /**
28 *
29 * Utility methods for extracting annotation details from a QDox JavaClass.
30 *
31 * @author Kuali Student Team
32 */
33 public final class JavaClassAnnotationUtils {
34
35 private static final Logger log = LoggerFactory.getLogger(JavaClassAnnotationUtils.class);
36 /**
37 *
38 */
39 private JavaClassAnnotationUtils() {
40 // prevent subclassing and instances
41 }
42
43 public static boolean doesAnnotationExist(String simpleAnnotationName, JavaClass javaClass) {
44
45 Annotation[] as = javaClass.getAnnotations();
46
47 for (Annotation annotation : as) {
48 if (annotation.getType().getJavaClass().getName().equals(simpleAnnotationName))
49 return true;
50 }
51 // no match
52 return false;
53
54 }
55 /**
56 * Extract the value of the XmlEnum annotation from the class provided.
57 *
58 * returns null if the annotation does not exist on the class.
59 *
60 * returns String.class if no value is specified which is the default specified by the annotation.
61 *
62 * @param javaClass
63 * @return the class value stored in the XmlEnum annotation on the class specified.
64 */
65 public static Class<?>extractXmlEnumValue (JavaClass javaClass) {
66
67 Annotation[] as = javaClass.getAnnotations();
68
69 for (Annotation annotation : as) {
70 if (annotation.getType().getJavaClass().getName().equals(XmlEnum.class.getSimpleName())) {
71
72 AnnotationValue value = annotation.getProperty("value");
73
74 if (value == null) {
75 // this is what the XmlEnum annotation defaults to
76 // ideally I would get this from the XmlEnum but I can't figure out how
77 // so I will just hard code it.
78 return String.class;
79 }
80
81
82 String clazz = (String) value.getParameterValue();
83
84 String className = clazz.replaceFirst("\\.class", "");
85
86 try {
87 return ClassLoader.getSystemClassLoader().loadClass(className);
88 } catch (ClassNotFoundException e) {
89 log.error("No class found for name: " + className);
90
91 return null;
92 }
93
94 }
95 }
96
97 // no match
98 return null;
99 }
100 }