EntityConverter in Seam 3...

[hantsy]

There is no entityConverter in Seam3...
I searched via Google and get the following version...

public class EntityConverter implements javax.faces.convert.Converter,
          PartialStateHolder {

     private static final Object[] ZERO_ARGS = new Object[] {};

     @PersistenceContext
     private EntityManager entityManager;

     private Map<String, Serializable> stateMap = new ConcurrentHashMap<String, Serializable>();
     private boolean initialStateMarked;
     private boolean isTransient;

     @Override
     public Object getAsObject(FacesContext context, UIComponent component,
               String value) {
          final ValueExpression ve = component.getValueExpression("value");
          final Class<?> entityType = ve.getExpectedType();
          return this.entityManager.find(entityType, this.stateMap.get(value));
     }

     @Override
     public String getAsString(FacesContext context, UIComponent component,
               Object value) {
          final Serializable id = this.findId(value);
          final String idKey = value.getClass().getSimpleName() + id.hashCode();
          if (!this.stateMap.containsKey(idKey)) {
               this.stateMap.put(value.getClass().getSimpleName() + id.hashCode(),
                         id);
          }

          return idKey;
     }

     private Serializable findId(Object entity) {
          final EntityType<?> entityType = this.entityManager.getMetamodel()
                    .entity(entity.getClass());

          final Member idAttribute = entityType.getId(entity.getClass())
                    .getJavaMember();

          Property p = Properties.createProperty(idAttribute);

          return (Serializable) p.getValue(entity);
     }

     // ---------- State saving --------------
     @Override
     public void markInitialState() {
          this.initialStateMarked = true;
     }

     @Override
     public boolean initialStateMarked() {
          return this.initialStateMarked;
     }

     @Override
     public void clearInitialState() {
          this.stateMap = new ConcurrentHashMap<String, Serializable>();
          this.initialStateMarked = false;
     }

     @Override
     public Object saveState(FacesContext context) {
          if (context == null) {
               throw new IllegalArgumentException("FacesContext must not be null");
          }

          return Collections.unmodifiableMap(this.stateMap);
     }

     @Override
     public void restoreState(FacesContext context, Object state) {
          if (state != null) {
               this.stateMap = new ConcurrentHashMap<String, Serializable>(
                         (Map<? extends String, ? extends Serializable>) state);
               return;
          }

          this.stateMap.clear();
     }

     @Override
     public boolean isTransient() {
          return this.isTransient;
     }

     @Override
     public void setTransient(boolean newTransientValue) {
          this.isTransient = newTransientValue;
     }
}

What I applied in my application, I got an exception.

java.lang.IllegalArgumentException: Id attribute was not of specified type : com.telopsys.siorc.model.Country
     at org.hibernate.ejb.metamodel.AbstractIdentifiableType.getId(AbstractIdentifiableType.java:95)
     at org.hibernate.ejb.metamodel.AbstractIdentifiableType.getId(AbstractIdentifiableType.java:110)
     at com.telopsys.siorc.converter.EntityConverter.findId(EntityConverter.java:59)
     at com.telopsys.siorc.converter.EntityConverter.getAsString(EntityConverter.java:45)
     at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getFormattedValue(HtmlBasicRenderer.java:519)
     at com.sun.faces.renderkit.html_basic.MenuRenderer.renderOption(MenuRenderer.java:534)
     at com.sun.faces.renderkit.html_basic.MenuRenderer.renderOptions(MenuRenderer.java:792)
     at com.sun.faces.renderkit.html_basic.MenuRenderer.renderSelect(MenuRenderer.java:844)
     at com.sun.faces.renderkit.html_basic.MenuRenderer.encodeEnd(MenuRenderer.java:298)
     at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:883)
     at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:312)
     at com.sun.faces.renderkit.html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:105)
     at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:853)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1652)
     at com.sun.faces.renderkit.html_basic.CompositeRenderer.encodeChildren(CompositeRenderer.java:78)
     at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:853)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1652)
     at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
     at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:853)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1652)
     at org.richfaces.renderkit.RendererBase.renderChildren(RendererBase.java:278)
     at org.richfaces.renderkit.html.PopupPanelRenderer.encodeEnd(PopupPanelRenderer.java:534)
     at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:883)

It can not find the id attribute in my entity object, the Country is extended a base class BaseEntity which declared the id property.

By the way, the original version of the codes used @Inject @Any on the EntityManager, I think it works in a servlet runtime environment, I am using Seam 3 on Jboss 7 currently, so I must use @PersistenceContext to inject entityManger, is there a generic way to inject entityManager?

Regards

[nickarls]

Tried what entityManager.getEntityManagerFactory().getPersistenceUnitUtil.getIdentifier() returns? In other cases you'll just have to walk up the inheritance hierarchy until you find the ID, I guess.

[hantsy]

Thanks

[hantsy]

@Override
     public Object getAsObject(FacesContext context, UIComponent component,
               String value) {
          final ValueExpression ve = component.getValueExpression("value");
          final Class<?> entityType = ve.getExpectedType();
          return this.entityManager.find(entityType, this.stateMap.get(value));
     }

entityType alwasy return a Object instead of a Entity class.