selectOneMenu and Entity beans (JSF & JPA)

[Brendan Speer]

His has got to be a 'solved' problem before, but I can't seem to come up with the correct combination of google terms to get the answer.

I have a Datatable filled in by a OneToMany relationship off of an Entity(QAHeader) bean. One of the fields in this Entity(QALine) points to another Entity(LineType). I would like the make a selectOneMenu that selects one of the LineType Entities and set the QALine l_type to that Entity.

After some preliminary research, I found out that I have to use a converter. So I wrote a converter to take a string of the LineType ID and return the Object.

*edit* I forgot to mention that the Converter is registered in faces-config.xml

Now I'm getting:

  
[#|2008-09-18T14:01:54.954-0500|INFO|sun-appserver9.1|javax.enterprise.resource.webcontainer.jsf.lifecycle|_ThreadID=17;_ThreadName=httpSSLWorkerThread-8888-1;
sourceId=j_id_id16:j_id_id24:2:ccc[severity=(ERROR 2), summary=(j_id_id16:j_id_id24:2:ccc: Validation Error: Value is not valid), detail=(j_id_id16:j_id_id24:2:ccc: Validation Error: Value is not valid)]
sourceId=j_id_id16:j_id_id24:0:ccc[severity=(ERROR 2), summary=(j_id_id16:j_id_id24:0:ccc: Validation Error: Value is not valid), detail=(j_id_id16:j_id_id24:0:ccc: Validation Error: Value is not valid)];|WARNING: FacesMessage(s) have been enqueued, but may not have been displayed.
sourceId=j_id_id16:j_id_id24:2:ccc[severity=(ERROR 2), summary=(j_id_id16:j_id_id24:2:ccc: Validation Error: Value is not valid), detail=(j_id_id16:j_id_id24:2:ccc: Validation Error: Value is not valid)]
sourceId=j_id_id16:j_id_id24:0:ccc[severity=(ERROR 2), summary=(j_id_id16:j_id_id24:0:ccc: Validation Error: Value is not valid), detail=(j_id_id16:j_id_id24:0:ccc: Validation Error: Value is not valid)]|#]
 
  

Whenever I submit the page, whether I have changed the values or not.

Everywhere I put debug statements the values seem to be valid.

Can anyone point me to a solution?

Datatable:

  
<h:dataTable border="1" value="#{selectionTracker.selectedQAHeader.lines}" var="line">

<h:column id="column2">
<h:selectOneMenu id="ccc" value="#{line.l_type}" >
  <f:selectItems value="#{database.selectItemTypes}"/>
</h:selectOneMenu>
 
<f:facet name="header">
<h:outputText value="Line Type"></h:outputText>
</f:facet>
</h:column>
 
</h:dataTable><br>
  

Converter:

  
package com.xx.qa.converters;
 
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.persistence.EntityManager;
 
import com.xx.qa.backing.Database;
import com.xx.qa.qadatabase.LineType;
 
public class LineTypeConverter implements Converter {
 
 
private EntityManager em;

public Object getAsObject(FacesContext arg0, UIComponent arg1, String arg2) {
LineType lt;

Database db;

System.out.println(arg2);

db = (Database) arg0.getApplication().getExpressionFactory().
createValueExpression(
arg0.getELContext(), 
"#{database}", 
Database.class).getValue(arg0.getELContext());

em = db.getEm();
 
lt = em.find(LineType.class, (int)Integer.valueOf(arg2));
 
return(lt);

}
 
public String getAsString(FacesContext arg0, UIComponent arg1, Object arg2) {
 
return String.valueOf(((LineType)arg2).getId());
}
 
}
 
  

Here's the function that builds the SelectItem List:

  
public List<SelectItem> getSelectItemTypes() {
List<LineType>  ltl;
LineType ll=null;
List<SelectItem> seli = new ArrayList<SelectItem>();

ltl = em.createQuery("SELECT y FROM LineType y").getResultList();

for(Iterator<LineType> lli = ltl.iterator(); lli.hasNext(); ) {
ll=lli.next();
SelectItem si = new SelectItem(ll.getId(),ll.getShortname());
//System.out.println(si.getValue().getClass());
//System.out.println(si.getValue());
//System.out.println(si.getLabel());
seli.add(si );
}

return(seli);
}
  

faces-config.xml

  
<converter>
<display-name>LineTypeConverter</display-name>
<converter-for-class>com.parispresents.qa.qadatabase.LineType</converter-for-class>
<converter-class>com.parispresents.qa.converters.LineTypeConverter</converter-class>
</converter>
 

  

[ September 18, 2008: Message edited by: Brendan Speer ]