Re: Is fireModelChanged mandatory ?

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Christian Cryder a =E9crit :

> Does this help at all?
>
Sure it does ! Thanks a lot for your feedback which helped me sort my
ideas out.
I did try the different paths you pointed out, and came to that conclusions=
 :

1) Repopulation is by nature an hybrid beast. It must rely on forms, which
are generally bound to the request/controller phase of the request, and
components, which are required in the response/view phase of the request.

So mixing layers seems a not so bad solution to me...

2) Anyway, it seems closer to components, since it must handle formatting
concerns, localization, or even rendering options depending on the type of
the data.

So I finally came out with an implementation extending from
AbstractTemplateModel and delagating to a FromMap (your number 1 option).
I would be very grateful to anyone wishing to review that piece of code
(quite simple in fact, I hope I didn't miss some obvious trap :-)

Typical usage would be :

Controller :

public void handleControlEvent(ControlEventContext context) throws ... {
    FormMapTemplateModel fmtm =3D new FormMapTemplateModel("name", new
WellDefinedFormMap());
    try {
          fmtm.map(context.getRequest()).validate(true);
        } catch (ValidationException ve) {
          ErrorManager.handleError(ve);
          ObjectRepository.getLocalRepository().putState("FMTM", fmtm);
          context.getQueue().addEvent(new RenderForm());
          return;
       }
       context.getQueue().addEvent(new RenderSuccess());   // Success

View :

public class RenderFormHandler extends BTemplateViewHandler {
    public Object getTemplateModels() {
       TemplateModel tm =3D
(TemplateModel)ObjectRepository.getLocalRepository().getState("FMTM");
       return tm;
    }

and that's it ! Form is repopulated, errors are flagged and template
component is feeded.

3) I also came accross a need to add a FormType, namely FormType.PASSWORD,
that is nothing but a FormType.STRING, but from which you could infer a
rendering option when repopulating. Does it seems like a resonnable thing
to include in FormType ?

    // Password type definition. Basically a string.
    public static FormType PASSWORD =3D new FormType() {
        public Class getFormClass() {
            return String.class;
        }

        public Object parse(String origVal, Locale locale) throws
ParseException {
            return origVal;
        }

        public Object [] getTypeArray(int size) {
            return new String [size];
        }
    };


4) Then my last proposition would be to add this method to FormUtil :

    public static Map getKeysAndValues(FormMap fm) {
    Map keyValuesMap =3D new HashMap();
        Set keys =3D fm.getStateKeys();
        for (Object key : keys) {
        if (fm.getElement((String)key).allowMultiples()) {
        keyValuesMap.put(key, fm.getVals((String)key));
        } else {
                keyValuesMap.put(key, fm.getVal((String)key));
        }
    }
        return keyValuesMap;
    }

Not really related to repopulation, but I missed this type of thing when
playing with forms... (btw, I guess it should be made Tiger
independant...)

Thanks for your comments.

Franck

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