Hi,
Vyrobok defaultChoice = vyrobky.get(0);
DropDownChoice<Vyrobok> vyberVyrobku =
new DropDownChoice<Vyrobok>(
"zoznam",
new PropertyModel<Vyrobok>(defaultChoice, "kluc"),
vyrobky,
renderer);
you're instructing the DropDownChoice to get its model object from your
defaultChoice:
new PropertyModel<Vyrobok>(defaultChoice, "kluc")
This is probably not what you've intended as Kluc is a String. Something
like the following would make more sense:
this.selectedChoice = vyrobky.get(0);
new PropertyModel<Vyrobok>(this, "selectedChoice")
Sven
On 05/11/2012 09:16 AM, Michael Jaruska wrote:
Hi folks,
after hours of elaborating, searching docu and trying I'm totaly lost.
My ChoiceRenderer is not
working.
Here is my code (not relevant code has been removed):
markup:
<select id="1" wicket:id="zoznam"></select>
page implementation:
public class PageEshop extends PageBase{
public PageEshop(){
ChoiceRendererVyrobok renderer = new ChoiceRendererVyrobok();
List<Vyrobok> vyrobky = Arrays.asList(new Vyrobok("start",
"-Vyberte typ-"), new Vyrobok("polstar", "Polštář"), new
Vyrobok("deka", "Deka"));
Vyrobok defaultChoice = vyrobky.get(0);
DropDownChoice<Vyrobok> vyberVyrobku = new
DropDownChoice<Vyrobok>("zoznam", new
PropertyModel<Vyrobok>(defaultChoice, "kluc"), vyrobky, renderer);
Form<Object> form = new Form<Object>("inputForm");
form.add(vyberVyrobku);
this.add(form);
}
}
pojo:
public class Vyrobok implements Serializable{
private String kluc;
private String hodnota;
public Vyrobok(String kluc, String hodnota){
this.kluc = kluc;
this.hodnota = hodnota;
}
//getters and setters for attributes
}
IChoiceRenderer implementation:
public class ChoiceRendererVyrobok implements IChoiceRenderer<Vyrobok>{
@Override
public Object getDisplayValue(Vyrobok vyrobok){
return vyrobok.getHodnota();
}
@Override
public String getIdValue(Vyrobok vyrobok, int index){
return vyrobok.getKluc();
}
}
When page is loaded, this error happens (not complete stack, not
relevant removed):
Caused by: java.lang.ClassCastException: java.lang.String cannot be
cast to cz.polstareadeky.utils.Vyrobok
at
cz.polstareadeky.ChoiceRendererVyrobok.getIdValue(ChoiceRendererVyrobok.java:1)
at
org.apache.wicket.markup.html.form.AbstractSingleSelectChoice.getModelValue(AbstractSingleSelectChoice.java:194)
at
org.apache.wicket.markup.html.form.FormComponent.getValue(FormComponent.java:837)
Something is wrong in ChoiceRendererVyrobok but I can't find what..
Any help is apreciated,
thanks, Michal
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