Spring webflow binder not binding collection object - spring

Question

I'm using spring webflow v2.4.8 in my app, and trying to bind the model properties using <binder></binder>. But my collection objects (list1, list2 both ArrayList) never get bound. If I remove the <binder></binder> altogether, all properties are getting correctly bound, but in my case that is not an option.
Do I need to use some custom converter here? Any help greatly appreciated
<view-state id="myId" model="myModel" view="myView" >
<binder>
<binding property="list1"/>
<binding property="list2"/>
<binding property="string1"/>
<binding property="string2"/>
.
.
.
</binder>
.
.
.
</view-state>

Answer 1

It's been a while, but in my project I have a custom ConversionService, so maybe you can try using one like this:
[EDIT]
Here is an example of a converter using a service (that gets the object from the db)
#Named
public class StringToMyType extends StringToObject {
#Inject
private MyTypeService service;
public StringToMyType(MyType myObject) {
super(myObject);
}
#Override
protected Object toObject(String id, Class<?> targetClass) throws Exception {
if (id != null && id.length != 0) {
return service.findById(new Long(id));
} else return null;
}
#Override
protected String toString(Object myObject) throws Exception {
return Objects.toString(((MyType) myObject).getId());
}
}
and add it here
public class CustomDefaultConversionService extends DefaultConversionService {
#Override
protected void addDefaultConverters() {
super.addDefaultConverters();
addConverter(new MyTypeConverter()
addConverter(new ObjectToCollection(this));
}
}
it needs to then be registered this way (xml):
<webflow:flow-builder-services id="flowBuilderServices" view-factory-creator="mvcViewFactoryCreator" conversion-service="conversionService"/>
<bean id="conversionService" class="path.to.converter.CustomDefaultConversionService"/>
hope this helps