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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.ELForwardTag</code> class. It is
32 * needed to override the default mapping of custom tag attribute names to
33 * class 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 ELForwardTagBeanInfo extends SimpleBeanInfo {
41 public PropertyDescriptor[] getPropertyDescriptors() {
42 ArrayList proplist = new ArrayList();
43
44 try {
45 proplist.add(new PropertyDescriptor("name", ELForwardTag.class,
46 null, "setNameExpr"));
47 } catch (IntrospectionException ex) {
48 }
49
50 PropertyDescriptor[] result = new PropertyDescriptor[proplist.size()];
51
52 return ((PropertyDescriptor[]) proplist.toArray(result));
53 }
54 }