your model object should be a collection instead of a string because
this component allows selection of multiple values.
-igor
On Tue, Sep 22, 2009 at 6:37 AM, Sadhna Ahuja <sadhna.ah...@nisc.coop> wrote:
> Hello,
>
>
>
> I have a ListMultipleChoice component in my form and I get the following
> exception when I select an option and submit the form:
>
>
>
> Caused by: java.lang.ClassCastException: java.lang.String cannot be cast
> to java.util.Collection
>
> at
> org.apache.wicket.markup.html.form.ListMultipleChoice.updateModel(ListMu
> ltipleChoice.java:325)
>
> at
> org.apache.wicket.markup.html.form.Form$20.validate(Form.java:1837)
>
> at
> org.apache.wicket.markup.html.form.Form$ValidationVisitor.formComponent(
> Form.java:165)
>
> at
> org.apache.wicket.markup.html.form.FormComponent.visitFormComponentsPost
> OrderHelper(FormComponent.java:421)
>
> at
> org.apache.wicket.markup.html.form.FormComponent.visitFormComponentsPost
> OrderHelper(FormComponent.java:408)
>
> at
> org.apache.wicket.markup.html.form.FormComponent.visitFormComponentsPost
> Order(FormComponent.java:385)
>
> at
> org.apache.wicket.markup.html.form.Form.visitFormComponentsPostOrder(For
> m.java:1060)
>
> at
> org.apache.wicket.markup.html.form.Form.internalUpdateFormComponentModel
> s(Form.java:1829)
>
> at
> org.apache.wicket.markup.html.form.Form.updateFormComponentModels(Form.j
> ava:1796)
>
> at org.apache.wicket.markup.html.form.Form.process(Form.java:865)
>
> at
> org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:807)
>
> ... 53 more
>
>
>
> Could someone please point out if I'm missing something? Here's the
> relevant pieces of my code:
>
> ------
>
> ListMultipleChoice searchPymntApplCd = new
> ListMultipleChoice(
>
> "searchPymntApplCd",
>
> new AbstractReadOnlyModel() {
>
> public Object getObject() {
>
> return getPaymentApplOptions(paymentAppls);
> //This returns ArrayList<PaymentApplOption>
>
> }},
>
> new IChoiceRenderer() {
>
> public Object getDisplayValue(Object object) {
>
> PaymentApplOption option =
> (PaymentApplOption) object;
>
> return option.getPymntApplDesc();
>
> }
>
> public String getIdValue(Object object, int
> index) {
>
> if
> (PaymentApplOption.class.isInstance(object)) {
>
> PaymentApplOption option =
> (PaymentApplOption) object;
>
> return option.getPymntApplCd();
>
> }
>
> return null;
>
> }
>
> }).setMaxRows(5);
>
> searchPymntApplCd.setRequired(false);
>
> searchPymntApplCd.setType(Collection.class);
>
> add(searchPymntApplCd);
>
>
>
> -------
>
> public class PaymentApplOption implements Serializable {
>
>
>
> private String pymntApplCd;
>
> private String pymntApplDesc;
>
> ...
>
> }
>
>
>
> Thanks.
>
>
>
>
>
>
>
>
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