1 /**
2 * Copyright 2004-2014 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.kpme.core.sys.context;
17
18 import org.kuali.kpme.core.sys.constants.SpringBeans;
19 import org.springframework.beans.BeansException;
20 import org.springframework.context.ApplicationContext;
21 import org.springframework.context.ApplicationContextAware;
22
23 /**
24 * helper class for spring beans stuff
25 *
26 * Copied over from SpringContext.java from the LeaveManager Project
27 */
28 public class SpringContext implements ApplicationContextAware {
29
30 private static ApplicationContext applicationContext;
31
32 /**
33 * public constructor that throws exception if you try to instantiate it
34 * twice
35 *
36 * @throws Exception
37 */
38 public SpringContext() throws Exception {
39 if (applicationContext != null)
40 throw new Exception(
41 "Cannot instantiate SpringContext twice. Use the static methods");
42 }
43
44 /*
45 * (non-Javadoc)
46 *
47 * @see
48 * org.springframework.context.ApplicationContextAware#setApplicationContext
49 * (org.springframework.context.ApplicationContext)
50 */
51 @Override
52 public void setApplicationContext(ApplicationContext applicationContext)
53 throws BeansException {
54 SpringContext.applicationContext = applicationContext;
55 }
56
57 /**
58 * return a spring bean by its name
59 *
60 * @param beanName
61 * @return
62 */
63 public static Object getBean(SpringBeans bean) {
64 return applicationContext.getBean(bean.toString());
65 }
66
67 /**
68 * returns a spring bean by its class... this only works when the class name
69 * equals the spring bean name
70 *
71 * @param clazz
72 * @return
73 */
74 @SuppressWarnings("unchecked")
75 public static <T> T getBean(Class<T> clazz) {
76 String[] beanNames = applicationContext.getBeanNamesForType(clazz);
77 // just return the first one
78 return (T) applicationContext.getBean(beanNames[0]);
79 }
80 }