JSFSelectDemo.java

// XHTML :

<h:body>
	<h:selectOneItem value="#{myController.myObject}" 
		converter="#{myObjectConverter}">
		<f:selectItems value="#{myController.mySelectItems}"/>
	</h:selectOneItem>
</h:body>


// MYCTRONOLLER :

@ManagedBean
public class MyController {

	@EJB
	private MyObjectService myObjectService;
	
	private MyObject myObject;

	private List<SelectItem> mySelectItems;

	public List<SelectItem> getMySelectItems() {
		if(null == mySelectItems) {
			mySelectItems = new ArrayList();
			List<MyObject> obj = myObjectService.getAll();
			for(MyObject o : obj) {
				SelectItem selectItem = 
					new SelectItem(o, o.getName());

				mySelectItems.add(selectItem);
			}
		} 		
	}
}

// CONVERTER :

@ManagedBean
public class MyObjectConverter implements Converter {

	@EJB
	private MyObjectService myObjectService;

	public Object getAsObject(String value) {
		Long id = Long.valueOf(value);
		return myObjectService.findById(id);
	}

	public String getAsString(Object value) {
		return String.valueOf(((MyObject) value).getId());
	}
	
}