1 /*
2 * $Source$
3 * $Revision$
4 *
5 * Copyright (C) 2007 Tim Pizey
6 *
7 * Part of Melati (http://melati.org), a framework for the rapid
8 * development of clean, maintainable web applications.
9 *
10 * Melati is free software; Permission is granted to copy, distribute
11 * and/or modify this software under the terms either:
12 *
13 * a) the GNU General Public License as published by the Free Software
14 * Foundation; either version 2 of the License, or (at your option)
15 * any later version,
16 *
17 * or
18 *
19 * b) any version of the Melati Software License, as published
20 * at http://melati.org
21 *
22 * You should have received a copy of the GNU General Public License and
23 * the Melati Software License along with this program;
24 * if not, write to the Free Software Foundation, Inc.,
25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the
26 * GNU General Public License and visit http://melati.org to obtain the
27 * Melati Software License.
28 *
29 * Feel free to contact the Developers of Melati (http://melati.org),
30 * if you would like to work out a different arrangement than the options
31 * outlined here. It is our intention to allow Melati to be used by as
32 * wide an audience as possible.
33 *
34 * This program is distributed in the hope that it will be useful,
35 * but WITHOUT ANY WARRANTY; without even the implied warranty of
36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37 * GNU General Public License for more details.
38 *
39 * Contact details for copyright holder:
40 *
41 * Tim Pizey <timp At paneris.org>
42 * http://paneris.org/~timp
43 */
44 package org.melati.poem.util;
45
46 import java.lang.reflect.Method;
47
48 /**
49 * @author timp
50 * @since 15 Jun 2007
51 *
52 */
53 public final class ClassUtils {
54
55 private ClassUtils() {}
56
57 /**
58 * @param clazz The class to introspect
59 * @param methodName The name of one argument methods to find
60 * @return An array of methods with the given name and one argument
61 */
62 public static Method[] getOneArgumentMethods(Class<?> clazz, String methodName) {
63 Method[] methods = clazz.getMethods();
64 Method[] possibleMethods = new Method[methods.length];
65 int possibleIndex = 0;
66 for (int i = 0; i < methods.length; i++) {
67 if (methods[i].getName().equals(methodName)
68 && methods[i].getParameterTypes().length == 1) {
69 possibleMethods[possibleIndex++] = methods[i];
70 }
71 }
72 return (Method[])ArrayUtils.section(possibleMethods, 0, possibleIndex);
73 }
74
75 /**
76 * @param clazz The class to introspect
77 * @param methodName The name of the no argument public method to return
78 * @return An accessible Method with the given name and no arguments or null
79 */
80 public static Method getNoArgMethod(Class<?> clazz, String methodName) {
81 Method method;
82 try {
83 method = clazz.getMethod(methodName, new Class[] {});
84 } catch (Exception e) {
85 method = null;
86 }
87 return method;
88 }
89
90 }