Hi guys,
I've implemented a new component that make AJAX call on a select change
event and update the page with the AJAX response. The Ajax response is
the result of a Block render. The Block contains a BeanEditor.
The following is a sample code portion of what I've done and some
questions about the implementation:
void beginRender(MarkupWriter writer) {
Link l = resources.createEventLink("SelectChange");
renderSupport.addScript("new FieldObserve('%s');", l.toAbsoluteURI());
componentActions = new ComponentActionSink(logger);
formSupport = new FormSupportAdapter(formSupport) {
@Override
public <T> void store(T component, ComponentAction<T> action) {
componentActions.store(component, action);
}
@Override
public <T> void storeAndExecute(T component, ComponentAction<T> action)
{
componentActions.store(component, action);
action.execute(component);
}
};
environment.push(FormSupport.class, formSupport);
}
void afterRender(MarkupWriter writer) {
environment.pop(FormSupport.class);
}
/*Ajax Call on select change. Returns a Block containing a BeanEditor.*/
Object onSelectChange() {
environment.push(FormSupport.class, formSupport);
environment.push(ValidationTracker.class, validationTracker);
return getBlock(request.getParameter("value"));
}
The questions:
1)In the onSelectChange method the services FormSupport and
ValidationTracker are not available in the environment's stack;
therefore I have to add these services using two previously setted
persisted (@Persist) variables.
Is there a better way to pass these services to my method?
2)In the method beginRender I must create a new FormSupportAdapter as
like as FormFragment component otherwise the ComponentActionSink.store()
method throws an IOException.
Have you any idea I have to create a FormSupportAdapter?
Grazie!
Roberto Iannone.
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