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18 package org.apache.strutsel.taglib.logic;
19
20 import java.beans.IntrospectionException;
21 import java.beans.PropertyDescriptor;
22 import java.beans.SimpleBeanInfo;
23
24 import java.util.ArrayList;
25
26 /***
27 * This is the <code>BeanInfo</code> descriptor for the
28 * <code>org.apache.strutsel.taglib.logic.ELNotPresentTag</code> class. It is
29 * needed to override the default mapping of custom tag attribute names to
30 * class attribute names. <p> This is because the value of the unevaluated EL
31 * expression has to be kept separately from the evaluated value, which is
32 * stored in the base class. This is related to the fact that the JSP compiler
33 * can choose to reuse different tag instances if they received the same
34 * original attribute values, and the JSP compiler can choose to not re-call
35 * the setter methods, because it can assume the same values are already set.
36 */
37 public class ELNotPresentTagBeanInfo extends SimpleBeanInfo {
38 public PropertyDescriptor[] getPropertyDescriptors() {
39 ArrayList proplist = new ArrayList();
40
41 try {
42 proplist.add(new PropertyDescriptor("cookie",
43 ELNotPresentTag.class, null, "setCookieExpr"));
44 } catch (IntrospectionException ex) {
45 }
46
47 try {
48 proplist.add(new PropertyDescriptor("header",
49 ELNotPresentTag.class, null, "setHeaderExpr"));
50 } catch (IntrospectionException ex) {
51 }
52
53 try {
54 proplist.add(new PropertyDescriptor("name", ELNotPresentTag.class,
55 null, "setNameExpr"));
56 } catch (IntrospectionException ex) {
57 }
58
59 try {
60 proplist.add(new PropertyDescriptor("parameter",
61 ELNotPresentTag.class, null, "setParameterExpr"));
62 } catch (IntrospectionException ex) {
63 }
64
65 try {
66 proplist.add(new PropertyDescriptor("property",
67 ELNotPresentTag.class, null, "setPropertyExpr"));
68 } catch (IntrospectionException ex) {
69 }
70
71 try {
72 proplist.add(new PropertyDescriptor("role", ELNotPresentTag.class,
73 null, "setRoleExpr"));
74 } catch (IntrospectionException ex) {
75 }
76
77 try {
78 proplist.add(new PropertyDescriptor("scope", ELNotPresentTag.class,
79 null, "setScopeExpr"));
80 } catch (IntrospectionException ex) {
81 }
82
83 try {
84 proplist.add(new PropertyDescriptor("user", ELNotPresentTag.class,
85 null, "setUserExpr"));
86 } catch (IntrospectionException ex) {
87 }
88
89 PropertyDescriptor[] result = new PropertyDescriptor[proplist.size()];
90
91 return ((PropertyDescriptor[]) proplist.toArray(result));
92 }
93 }