Hi,
I have a problem constructing ListMultipleChoice objects inside the loop.
I had written the code as:
List groupModelsDrop = new ArrayList();
propertyLoop2 = new Loop("properties2", propertyList2.size()) {
@Override
protected void populateItem(final LoopItem
propertyItem) {
final Property property2 =
propertyList2.get(propertyItem.getIteration());
propertyItem.add(new Label("propertyName2",
property2.getName()));
final List itemList2 = new
ArrayList(property2.getItems());
IModel<Collection<Item>> allItemsModel
= new
PropertyModel<Collection<Item>>( new Model(),
groupModelsDrop.get(propertyItem.getIteration())
);
final ListMultipleChoice itemSelect = new
ListMultipleChoice(
"itemList",
allItemsModel,
itemList2,
new IChoiceRenderer() {
@Override
public String getIdValue(Item item, int index) {
return String.valueOf(item.getId());
}
@Override
public String getDisplayValue(Item item) {
return item.getName();
}
});
propertyItem.add(itemSelect);
};
};
but the problem is; when i submit the form it gives an error "WicketMessage:
Attempted to set property value on a null object. Property expression:
groupModelsDrop.get(propertyItem.getIteration()) " like that.
Where is my fault?
I need your suggestions.
With my best regards.
-----
Wicket-Java
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