1 package nl.tudelft.simulation.introspection.beans;
2
3 import java.beans.PropertyDescriptor;
4
5 /**
6 * Utility class for bean tests.
7 * <p>
8 * Copyright (c) 2002-2024 Delft University of Technology, Jaffalaan 5, 2628 BX Delft, the Netherlands. All rights reserved. See
9 * for project information <a href="https://simulation.tudelft.nl/" target="_blank"> https://simulation.tudelft.nl</a>. The DSOL
10 * project is distributed under a three-clause BSD-style license, which can be found at
11 * <a href="https://https://simulation.tudelft.nl/dsol/docs/latest/license.html" target="_blank">
12 * https://https://simulation.tudelft.nl/dsol/docs/latest/license.html</a>.
13 * </p>
14 * @author <a href="https://www.linkedin.com/in/peterhmjacobs">Peter Jacobs </a>
15 * @author <a href="https://www.tudelft.nl/averbraeck">Alexander Verbraeck</a>
16 * @author Niels Lang.
17 * @since 1.5
18 */
19
20 public class BeanUtils extends Object
21 {
22 /**
23 * resolves whether the bean is null
24 * @param bean Object; A bean instance.
25 * @param pd PropertyDescriptor; A PropertyDescriptor for the property to be examined.
26 * @return True, if the value of the property described by 'pd' for the instance 'bean' is null indeed. Returns false
27 * otherwise.
28 */
29 public static boolean isNull(final Object bean, final PropertyDescriptor pd)
30 {
31 Object result = null;
32 try
33 {
34 result = pd.getReadMethod().invoke(bean, new Object[0]);
35 }
36 catch (Exception e)
37 {
38 return true;
39 }
40 return (result == null);
41 }
42 }