Hi Bruno, Your last suggestion resembles how I basically have overwritten the setSelectionListBox(SelectionList) method in the Field.java source. However, I have to admit that for my problem, your first solution would have been a lot easier!
Thanx, Ron -----Original Message----- From: Bruno Dumon [mailto:[EMAIL PROTECTED] Sent: Thursday, June 16, 2005 8:33 PM To: dev@cocoon.apache.org Subject: Re: [Cforms] Java Selection List On Thu, 2005-06-16 at 11:05 -0400, Vadim Gritsenko wrote: > Bruno Dumon wrote: > > On Thu, 2005-06-16 at 10:51 +0200, Ron van de Ven wrote: > > > >>I have to set a selection list on a field, based on success or > >>failure of a validation. > >> > >>When I use the following fragment: > >> > >> TntCformsJavaSelectionList mySelectionList = new > >>TntCformsJavaSelectionList(true); > >> mySelectionList.setDatatype(new StringType()); > >> myField.setSelectionList(mySelectionList); > >> > >>I get an error: Tried to assign a SelectionList that is not > >>associated with this widget's datatype. > > > > > > then why not do: > > > > mySelectionList.setDatatype(myField.getDatatype()); > > > > ? > > I think I had similar situation, with this answer to the question > above: you may want to share potentially large selection list(s) > between multiple widgets, here widgets might be on the same form, or even on multiple forms for multiple users. > It could be quite substantial memory savings... In this scenario, you > need either multiple widgets have same instance of datatype on > multiple widgets (is it even possible?), or use equals() instead of '==' as was suggested. I see. But is it feasible to implement equals? Testing the equality of a datatype includes testing the equality of its contained convertor, which could be configurable in all sorts of ways. Another possibility would be to change the contract of the SelectionList, letting the field pass its datatype (or even just its convertor) to the SelectionList.generateSaxFragment method. To check the type-compatibility, a SelectionList.getTypeClass() method could be added (cfr. Datatype.getTypeClass()). -- Bruno Dumon http://outerthought.org/ Outerthought - Open Source, Java & XML Competence Support Center [EMAIL PROTECTED] [EMAIL PROTECTED]
