Hey guys,
I'm back to using Wicket after a 3 year break! Anyway, if any of you can
help with this delightful pain I'd return the favor (eventually!).
Background:
- I have a DTO/VO that has a property that is a list of strings (e.g.
String[] propertyA)
- The lookup items (choices) for this property is a list of name/value pairs
(e.g. EnumerationValue class) and the values will be the ones that need to
be passed onto the DTO/VO property.
public class EnumerationValue implements Serializable
{
private String code;
private String description;
public String getCode()
{
return code;
}
public void setCode(String code)
{
this.code = code;
}
public String getDescription()
{
return description;
}
public void setDescription(String description)
{
this.description = description;
}
}
I had setup a custom model to handle the translation between the collection
of EnumerationValues coming from the UI and into the DTO/VO object:
private IModel createFundInstrumentTypeCodeModel(final
List<EnumerationValue> choices) {
return new IModel<List<EnumerationValue>>() {
// this gets the value from the model object backing the form
public List<EnumerationValue> getObject() {
final List<String> codes= wizard.getFundingInstrumentCodes
();
// loop through the 'choices' and compare
the code of each choice with the string list
// pick out all the matching items from the
choices
return CollectionHelper.get(choices, codes);
}
// this sets the value from the form into the model object
backing the form
public void setObject(List<EnumerationValue> object) {
// convert the list into a string list and set the DTO/VO
wizard.setFundingInstrumentCodes(CollectionHelper.convertToStringList(object));
}
public void detach() {
}
};
}
This custom model was working fine when I was using CheckBoxMultipleChoice
but I changed to CheckGroup since I wanted more control over the HTML being
produced. CheckGroup doesn't call the setObject() everytime the form is
submitted; accoridng to the updateModel() method, it only gets called when
the backing model object is null.
public void updateModel()
{
Collection collection = getModelObject();
if (collection == null)
{
collection = getConvertedInput();
setModelObject(collection);
}
else
{
modelChanging();
collection.clear();
collection.addAll(getConvertedInput());
setModelObject(collection); // TODO: Added this to allow
conversion of list of enumerated values into list of strings
modelChanged();
}
}
I've added the TODO line in there so that correct trnslation between list of
strings and list of EnumerartionValue can occur. Am I doing this correctly
or am I on the wrong ttrack.
Thanks!
Aye
