On Mon, 24 Jan 2005 15:16:55 -0600, Brad Balmer <[EMAIL PROTECTED]> wrote:
> I have ActionForm's that contain String array variables like:
>
> private String[] parmTypeCd = null;
>
> With the normal:
> public String[] getParmTypeCd() {
> return parmTypeCd;
> }
> public void setParmTypeCd(String parmTypeCd[]) {
> this.parmTypeCd = parmTypeCd;
> }
>
> My form has:
> <html:select property="parmTypeCd" multiple="true" size="3">
> <html:option value="1">Value1</html:option>
> <html:option value="2">Value2</html:option>
> ...
> </html:select>
>
> Then, underneath I build my ArrayList to pass to my iBatis query like:
>
> ArrayList parmTypeCds = null;
> if(form.getParmTypeCd() != null && form.getParmTypeCd().length > 0) {
> parmTypeCds = new ArrayList();
> String typeCds[] = form.getParmTypeCd();
> for(int i=0; i<form.getParmTypeCd().length; i++) {
> parmTypeCds.add(typeCds[i]);
> }
> }
>
> Pretty simple. There may be a better way to do it, but this works just fine
> for me.
And your not usinng the generics package like Will is.
>
> --Brad
>
> -----Original Message-----
> From: Will Stranathan [mailto:[EMAIL PROTECTED]
> Sent: Monday, January 24, 2005 3:11 PM
> To: user@struts.apache.org
> Subject: Select Multiple Issues
>
> I had posted earlier concerning this, and haven't gotten any response,
> but I think it got lost in all the spirited discussions about
> constants interfaces, leadership voting, etc. over the past week.
> I've done a lot of searching, and AFAICT, I'm trying all the right
> things, but it's still not working...
>
> I promise I google'd first....
>
> I'm trying to use a multiple-select select box, for example:
>
> <html:select multiple="true" property="bar" size="5">
> <html:option value="1">One</html:option>
> <html:option value="2">Two</html:option>
> <html:option value="3">Three</html:option>
> <html:option value="4">Four</html:option>
> </html:select>
>
> And I've tried backing my form bean with String[] AND with an
> ArrayList.
>
> When I try to use a String[] as the backing, the form displays, but
> when I submit, I get an argument type mismatch:
>
> DEBUG 2005-01-19 10:51:56
> org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:87
> 6)
> setProperty([EMAIL PROTECTED], bar, [2,4,8])
> DEBUG 2005-01-19 10:51:56
> org.apache.commons.beanutils.ConvertUtilsBean.convert(ConvertUtilsBean.java:
> 418)
> Convert string '2' to class 'java.lang.String'
> DEBUG 2005-01-19 10:51:56
> org.apache.commons.beanutils.ConvertUtilsBean.convert(ConvertUtilsBean.java:
> 426)
> Using converter
> [EMAIL PROTECTED]
> DEBUG 2005-01-19 10:51:56
> org.apache.commons.beanutils.PropertyUtilsBean.setSimpleProperty(PropertyUti
> lsBean.java:1756)
> setSimpleProperty: Invoking method public void
> com.boa.cis.portal.forms.FooForm.setBar(java.lang.String[]) with value
> 2 (class java.lang.String)
> ERROR 2005-01-19 10:51:56
> org.apache.commons.beanutils.PropertyUtilsBean.invokeMethod(PropertyUtilsBea
> n.java:1777)
> Method invocation failed.
> java.lang.IllegalArgumentException: argument type mismatch
>
> It looks like it's iterating through the values, calling a simple
> String set on each one.
>
> So I tried backing with an array list, like so:
>
> package com.boa.cis.portal.forms;
>
> import java.util.ArrayList;
> import org.apache.struts.action.ActionForm;
>
> public class FooForm extends ActionForm {
>
> private ArrayList<String> bar;
>
> public FooForm() {
> bar = new ArrayList<String>();
> }
>
> public String getBar(int index) {
> return this.bar.get(index);
> }
>
> public String[] getBar() {
> return (String[])this.bar.toArray();
> }
>
> public void setBar(int index, String bar) {
> this.bar.set(index,bar);
> }
>
> public void setBar(String[] bar) {
> this.bar.clear();
> for (int i = 0; i < bar.length; i++) {
> this.bar.set(i,bar[i]);
> }
> }
>
> public void reset(org.apache.struts.action.ActionMapping mapping,
> javax.servlet.http.HttpServletRequest request) {
> bar = new ArrayList<String>();
> super.reset(mapping, request);
> } }
>
> But that won't even render the form - I get a ClassCastException:
>
> ERROR 2005-01-19 10:58:58
> org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.ja
> va:918)
> ServletException in 'foo.jsp': Getter for property bar threw
> exception: java.lang.ClassCastException: [Ljava.lang.Object;
> javax.servlet.ServletException: Getter for property bar threw
> exception: java.lang.ClassCastException: [Ljava.lang.Object;
> at
> org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextI
> mpl.java:825)
>
> I'm using Struts 1.2.6.
>
> From all I can tell of the error reporting, is that possibly the
> Struts taglib is not using the multiple="true" property the way it
> ought, so it doesn't think it's supposed to be looking for an array
> type from the getter method on my form bean.
>
> Has anybody had any success with this?
>
> Thanks
> Will
>
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