Is your category converter a session bean?
On Fri, 18 Mar 2005 14:17:16 +0000, Kostas Karadamoglou
<[EMAIL PROTECTED]> wrote:
> 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]
