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21 package org.apache.strutsel.taglib.bean;
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.bean.ELSizeTag</code> class. It is needed
32 * to override the default mapping of custom tag attribute names to class
33 * attribute names. <p> This is because the value of the unevaluated EL
34 * expression has to be kept separately from the evaluated value, which is
35 * stored in the base class. This is related to the fact that the JSP compiler
36 * can choose to reuse different tag instances if they received the same
37 * original attribute values, and the JSP compiler can choose to not re-call
38 * the setter methods, because it can assume the same values are already set.
39 */
40 public class ELSizeTagBeanInfo extends SimpleBeanInfo {
41 public PropertyDescriptor[] getPropertyDescriptors() {
42 ArrayList proplist = new ArrayList();
43
44 try {
45 proplist.add(new PropertyDescriptor("collection", ELSizeTag.class,
46 null, "setCollectionExpr"));
47 } catch (IntrospectionException ex) {
48 }
49
50 try {
51 proplist.add(new PropertyDescriptor("id", ELSizeTag.class, null,
52 "setIdExpr"));
53 } catch (IntrospectionException ex) {
54 }
55
56 try {
57 proplist.add(new PropertyDescriptor("name", ELSizeTag.class, null,
58 "setNameExpr"));
59 } catch (IntrospectionException ex) {
60 }
61
62 try {
63 proplist.add(new PropertyDescriptor("property", ELSizeTag.class,
64 null, "setPropertyExpr"));
65 } catch (IntrospectionException ex) {
66 }
67
68 try {
69 proplist.add(new PropertyDescriptor("scope", ELSizeTag.class, null,
70 "setScopeExpr"));
71 } catch (IntrospectionException ex) {
72 }
73
74 PropertyDescriptor[] result = new PropertyDescriptor[proplist.size()];
75
76 return ((PropertyDescriptor[]) proplist.toArray(result));
77 }
78 }