I'm part of a project using JBoss Seam as the main component and have been
struggling to get a simple select-box to work.
Pretty soon I've found out that a Converter was needed which ended up in the
following solution:
My conveter's interface
| @Local
| public interface MyConverter extends Converter {
|
| }
My converter implementation
@Stateless
| @Name("ConvertARO")
| public class AroConverter implements MyConverter {
|
| @PersistenceContext
| private EntityManager em;
|
| @Logger
| private Log log;
|
| public Object getAsObject(FacesContext ctx, UIComponent component,
String value) {
| log.info("AroConverter:getAsObject() :: " + value);
| ARO aro = null;
| if ((value==null)||value.length()==0) {
| throw new ConverterException("Error 1 !");
| }
|
| for (Iterator iter = em.createQuery("from
ARO").getResultList().iterator(); iter.hasNext();) {
| ARO a = (ARO) iter.next();
| if(a.getName().equals(value)){
| aro = a;
| break;
| }
| }
|
| if (aro==null) {
| aro = new ARO();
| aro.setAro_id(0);
| }
|
| log.info(aro);
| return aro;
| }
|
|
| public String getAsString(FacesContext ctx, UIComponent component,
Object value) {
| if((ARO)value != null)
| return ((ARO)value).getName();
| else
| return "";
| }
| }
Excerpt from my xhtml page
<h:selectOneMenu id="selAro" value="#{selAcl.aro}" converter="#{ConvertARO}">
| <f:selectItems value="#{stockAction.axoRights}"/>
| </h:selectOneMenu>
When I started working on this problem, I created the converter without the
interface, which seemed to work. But sometimes JBoss freaks ut, telling me that
the converter cannot be found when rendering. I solved that part with the
interface. Now It renders OK, but when I try to submit information to an action
class, JBoss gives me the error message: java.lang.ClassNotFoundException: No
ClassLoaders found for: com.test.actions.MyConverter
Why do I get this error?
//Fredric
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