Well, I would say you should try to put debugging statements inside
the menu renderer and see if its getting anything back.
Like I said, it doesn't seem like you're doing anything wrong.
On Fri, 18 Mar 2005 17:02:48 +0000, Kostas Karadamoglou
<[EMAIL PROTECTED]> wrote:
> I have attached a print screen with the debugger showing that the "str"
> parameter of getAsObject is null
> and a print screen of the generated html of the selectOneMenu.
>
> My big problem is that one Monday I have to deliver an assignment and I
> am in hurry!! :-(
> Heath Borders wrote:
>
> >oh. Sorry I misunderstood your first email.
> >
> >That means that there's something wrong with the selectOneMenu or something.
> >
> >
> >On Fri, 18 Mar 2005 16:22:42 +0000, Kostas Karadamoglou
> ><[EMAIL PROTECTED]> wrote:
> >
> >
> >>Yes but how can JSF call the getAsObject method of the converter with
> >>the str parameter equals to null !!!
> >>
> >>I checked the generated code and the all the option tags in the drop
> >>down menu have a value ("1","2","3","4","5" and so on)
> >>So how jsf returns a null string? thats the problem. :(
> >>Heath Borders wrote:
> >>
> >>
> >>
> >>>No, you don't want to do that. Otherwise, the category object will
> >>>not be properly set in his setter. The problem is definitely with
> >>>your converter. My guess is that its getting re-created between
> >>>requests, and thus the map is getting cleared. I couldn't tell you
> >>>why that's happening, though.
> >>>
> >>>
> >>>On Fri, 18 Mar 2005 11:05:23 -0500, Srikanth Madarapu
> >>><[EMAIL PROTECTED]> wrote:
> >>>
> >>>
> >>>
> >>>
> >>>>Can you try
> >>>>
> >>>>this.allCategories.add(new SelectItem(category.getId(),
> >>>>category.getTitle()));
> >>>>
> >>>>The getId() method should return the same value as returned by
> >>>>getAsString(). I think there is some problem...
> >>>>
> >>>>Srikanth
> >>>>
> >>>>-----Original Message-----
> >>>>From: Kostas Karadamoglou [mailto:[EMAIL PROTECTED]
> >>>>Sent: Friday, March 18, 2005 10:56 AM
> >>>>To: MyFaces Discussion
> >>>>Subject: Re: Problem with the getAsObject of a Converter
> >>>>
> >>>>Hi, I attached the getter of allcategories, as you can see I return a
> >>>>list of selectItem objects
> >>>>
> >>>> public List getAllCategories(){
> >>>> if(this.allCategories==null){
> >>>> this.allCategories=new ArrayList();
> >>>> this.allCategories.add(new SelectItem(new Category(),"Choose
> >>>>a category..."));
> >>>> List categories=this.eventRegistry.getCategories();
> >>>> for(Iterator iter=categories.iterator(); iter.hasNext();){
> >>>> Category category=(Category)iter.next();
> >>>> this.allCategories.add(new SelectItem(category,
> >>>>category.getTitle()));
> >>>> }
> >>>> }
> >>>> return this.allCategories;
> >>>> }
> >>>>
> >>>>Srikanth Madarapu wrote:
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>What is the return type of allCategories ?
> >>>>>
> >>>>>The list coming from allCategories should be a list of "SelectItem"
> >>>>>objects, I think in yours case its just a list of Strings
> >>>>>
> >>>>>-Srikanth
> >>>>>
> >>>>>
> >>>>>-----Original Message-----
> >>>>>From: Kostas Karadamoglou [mailto:[EMAIL PROTECTED]
> >>>>>Sent: Friday, March 18, 2005 9:17 AM
> >>>>>To: [email protected]
> >>>>>Subject: Problem with the getAsObject of a Converter
> >>>>>
> >>>>>
> >>>>>Hi again!!!
> >>>>>
> >>>>>I have another problem now, Very strange Can you suggest me a solution?
> >>>>>
> >>>>>I created a converter for objects of type Category in order to display
> >>>>>some Category beans in a selectOneMenu tag.
> >>>>>
> >>>>>I have debuged the application and I noticed a strange behaviour of JSF
> >>>>>which I cannot understand.
> >>>>>Below I have the sequence explanation of the problem and the content of
> >>>>>each method and jsp fragment.
> >>>>>
> >>>>>1)The getAsString method works perfectly and returns the following
> >>>>>strings "0","1","2","3","4","5","6","7"
> >>>>>
> >>>>>2)The page is displayed properly, and I choose from the drop down menu a
> >>>>>category.
> >>>>>
> >>>>>2)Afterwords JSF invokes getAsObject (I think for the chosen option)
> >>>>>with the str parameter null !!!!!!!
> >>>>>In this situation I return a null object (which is wrong).
> >>>>>
> >>>>>4)After that when the page is redisplayed the getAsString throw an
> >>>>>Exception because of the null value
> >>>>>
> >>>>>JSP-------------------------------------------------------
> >>>>> <h:selectOneMenu id="selectCategory"
> >>>>>converter="#{categoryConverter}"
> >>>>>value="#{eventHandler.selectedCategory}">
> >>>>> <f:selectItems id="allCategories"
> >>>>>value="#{eventHandler.allCategories}"/>
> >>>>> </h:selectOneMenu>
> >>>>>
> >>>>>getAsString------------------------------------------------
> >>>>>
> >>>>> public String getAsString(FacesContext facesContext, UIComponent
> >>>>>uIComponent, Object obj) throws ConverterException {
> >>>>> String retValue=null;
> >>>>> if(obj==null)
> >>>>> throw new ConverterException("not null object of type
> >>>>>Category expected");
> >>>>> else if(obj instanceof Category){
> >>>>> Category category=(Category)obj;
> >>>>> map.put(new Integer(category.getId()), category);
> >>>>> retValue=String.valueOf(category.getId());
> >>>>> }else{
> >>>>> throw new ConverterException("object of type Category
> >>>>>expected received: "+obj.getClass().getName()+"="+obj.toString());
> >>>>> }
> >>>>> return retValue;
> >>>>> }
> >>>>>
> >>>>>getAsObject------------------------------------------------
> >>>>>
> >>>>> public Object getAsObject(FacesContext facesContext, UIComponent
> >>>>>uIComponent, String str) throws ConverterException {
> >>>>> Category retValue=null;
> >>>>> if(str!=null){
> >>>>> try{
> >>>>> System.out.println(str);
> >>>>> Integer id=Integer.valueOf(str);
> >>>>> retValue=(Category)map.get(id);
> >>>>> }catch(Exception ex){
> >>>>> throw new ConverterException("a number formatted string
> >>>>>expected");
> >>>>> }
> >>>>>
> >>>>> }else{
> >>>>> //throw new ConverterException("a not null string expected");
> >>>>> return null;
> >>>>> }
> >>>>> return retValue;
> >>>>> }
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> >>
> >>
> >
> >
> >
> >
>
>
>
--
-Heath Borders-Wing
[EMAIL PROTECTED]
