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1   /*** 
2    * 
3    * Copyright 2004 Protique Ltd
4    * 
5    * Licensed under the Apache License, Version 2.0 (the "License"); 
6    * you may not use this file except in compliance with the License. 
7    * You may obtain a copy of the License at 
8    * 
9    * http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS, 
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
14   * See the License for the specific language governing permissions and 
15   * limitations under the License. 
16   * 
17   **/
18  package org.codehaus.activemq.util;
19  
20  import org.apache.commons.logging.Log;
21  import org.apache.commons.logging.LogFactory;
22  
23  import java.lang.reflect.Method;
24  import java.util.Map;
25  
26  /***
27   * Some bean utility methods
28   *
29   * @version $Revision: 1.1 $
30   */
31  public class BeanUtils {
32      private static final Log log = LogFactory.getLog(BeanUtils.class);
33  
34      protected static final String NAME = "org.apache.commons.beanutils.BeanUtils";
35      protected static final Class[] PARAMETER_TYPES = new Class[]{Object.class, Map.class};
36  
37      public static void populate(Object bean, Map properties) {
38          // use reflection to avoid runtime dependnecy if this method is never called
39          Class beanUtils = null;
40          try {
41              beanUtils = Thread.currentThread().getContextClassLoader().loadClass(NAME);
42          }
43          catch (ClassNotFoundException e) {
44              try {
45                  beanUtils = BeanUtils.class.getClassLoader().loadClass(NAME);
46              }
47              catch (ClassNotFoundException e1) {
48                  log.trace("Cannot find: " + NAME + ". Reason: " + e, e);
49              }
50          }
51          if (beanUtils == null) {
52              log.warn("Could not find class: " + NAME + " so cannot configure bean using introspection: " + bean);
53          }
54          else {
55              Method method = null;
56              try {
57                  method = beanUtils.getMethod("populate", PARAMETER_TYPES);
58              }
59              catch (NoSuchMethodException e) {
60                  log.trace("Could not find populate", e);
61              }
62              if (method == null) {
63                  log.warn("Could not find populate() method so cannot configure bean using introspection: " + bean);
64              }
65              else {
66                  try {
67                      method.invoke(null, new Object[]{bean, properties});
68                  }
69                  catch (Exception e) {
70                      log.warn("Could not populate the bean via introspection: " + bean + ". Reason: " + e, e);
71                  }
72              }
73          }
74      }
75  }