1 /**
2 * Copyright 2005-2011 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.rice.krad.uif.util;
17
18 import org.apache.commons.lang.StringUtils;
19
20 /**
21 * Defines functions that can be used in el expressions within
22 * the UIF dictionary files
23 *
24 * @author Kuali Rice Team (rice.collab@kuali.org)
25 */
26 public class ExpressionFunctions {
27
28 /**
29 * Checks whether the given class parameter is assignable from the given object class
30 * parameter
31 *
32 * @param assignableClass - class to use for assignable to
33 * @param objectClass - class to use for assignable from
34 * @return boolean true if the object class is of type assignable class, false if not
35 */
36 public static boolean isAssignableFrom(Class<?> assignableClass, Class<?> objectClass) {
37 return assignableClass.isAssignableFrom(objectClass);
38 }
39
40 /**
41 * Checks whether the given value is null or blank string
42 *
43 * @param value - property value to check
44 * @return boolean true if value is null or blank, false if not
45 */
46 public static boolean empty(Object value) {
47 return (value == null) || (StringUtils.isBlank(value.toString()));
48 }
49
50 /**
51 * Returns the name for the given class
52 *
53 * @param clazz - class object to return name for
54 * @return String class name or empty string if class is null
55 */
56 public static String getName(Class<?> clazz) {
57 if (clazz == null) {
58 return "";
59 } else {
60 return clazz.getName();
61 }
62 }
63 }