I want to present a selection of Integers for the user
to choose. The jsp code is:
<html:select property="beginYear">
<html:options property="years"/>
</html:select>
The form bean has an indexed property "years":
public Integer [] getYears();
The above jsp code fails with this message:
Root cause:
java.lang.ClassCastException: java.lang.Integer
at
org.apache.struts.taglib.html.OptionsTag.doEndTag(OptionsTag.java:240)
when org.apache.struts.taglib/html.OptionsTab.doEndTag tries a direct
cast of Integer to String.
I understand that the "beginYear" property must be settable from a
String, but
it seems that the options tag should be able to call toString when
needed to
display properties (to simplify incorporating existing beans into
struts).
I believe html:options does do toString when the "collection" attribute
is specified.
The following short fix to OptionsTag does the trick.
Am I right that this is a bug/shortcoming with html:options, or is there
a simple
way around it (logic:iterator?) ?
--- OptionsTag.orig Sat Feb 24 11:36:21 2001
+++ OptionsTag.java Tue Mar 6 14:19:43 2001
@@ -237,10 +237,10 @@
// Render the options tags for each element of the values
coll.
while (valuesIterator.hasNext()) {
- String value = (String) valuesIterator.next();
+ String value = valuesIterator.next().toString();
String label = value;
if (labelsIterator.hasNext())
- label = (String) labelsIterator.next();
+ label = (String)
labelsIterator.next().toString();
addOption(sb, value, label,
selectTag.isMatched(value));
}
--
*****************************************************
Gordon Maclean, Software Engineer
http://www.atd.ucar.edu/homes/maclean
Nat'l Center for Atmospheric Research, Boulder CO USA
*****************************************************
