1 /*
2 * $Id: ELMessagesNotPresentTagBeanInfo.java 471754 2006-11-06 14:55:09Z husted $
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21 package org.apache.strutsel.taglib.logic;
22
23 import java.beans.IntrospectionException;
24 import java.beans.PropertyDescriptor;
25 import java.beans.SimpleBeanInfo;
26
27 import java.util.ArrayList;
28
29 /**
30 * This is the <code>BeanInfo</code> descriptor for the
31 * <code>org.apache.strutsel.taglib.logic.ELMessagesNotPresentTag</code>
32 * class. It is needed to override the default mapping of custom tag
33 * attribute names to class attribute names. <p> This is because the value of
34 * the unevaluated EL expression has to be kept separately from the evaluated
35 * value, which is stored in the base class. This is related to the fact that
36 * the JSP compiler can choose to reuse different tag instances if they
37 * received the same original attribute values, and the JSP compiler can
38 * choose to not re-call the setter methods, because it can assume the same
39 * values are already set.
40 */
41 public class ELMessagesNotPresentTagBeanInfo extends SimpleBeanInfo {
42 public PropertyDescriptor[] getPropertyDescriptors() {
43 ArrayList proplist = new ArrayList();
44
45 try {
46 proplist.add(new PropertyDescriptor("name",
47 ELMessagesNotPresentTag.class, null, "setNameExpr"));
48 } catch (IntrospectionException ex) {
49 }
50
51 try {
52 proplist.add(new PropertyDescriptor("property",
53 ELMessagesNotPresentTag.class, null, "setPropertyExpr"));
54 } catch (IntrospectionException ex) {
55 }
56
57 try {
58 proplist.add(new PropertyDescriptor("message",
59 ELMessagesNotPresentTag.class, null, "setMessageExpr"));
60 } catch (IntrospectionException ex) {
61 }
62
63 PropertyDescriptor[] result = new PropertyDescriptor[proplist.size()];
64
65 return ((PropertyDescriptor[]) proplist.toArray(result));
66 }
67 }