Problem with outjecting object

[skoropada]

Hi everybody,

I've seam component named resultsAction in which I use @In and @Out annotations I have entity B_property as well.
When I selected one row from properties list on the page I've exception like this:

Caused by: java.lang.IllegalArgumentException: Could not set field value by reflection: ResultsAction.activeProperty
on: pl.skoropada.components.ResultsAction with value: class [Ljava.lang.Object;

I've found temporary solution for this by changing type of activeProperty to Object but I don't know where the reason is.

Here is my component:

@Name(value = "resultsAction")
@Scope(ScopeType.SESSION)
public class ResultsAction {
...
  @In(required = false)
  private Bn_property property;

  @DataModel
  private List<Bn_property> properties;

  @DataModelSelection
  @Out(required = false)
  private Bn_property activeProperty;
...

and here is part of my xhtml's file (results.xhtml):

<rich:dataList var="prop" value="#{properties}">
     <h:column>#{prop[3]}  </h:column>
     <h:column>#{prop[3]}  </h:column>
     <h:column><h:commandLink action="#{resultsAction.view}" value="#{prop[4]}" /></h:column>
</rich:dataList>

The second question (less important right now) is why I have to refer to prop[n], where n belongs to 0..N instead of prop.name ?
When I changed to getter's style I had exception like this one;

 Caused by: javax.faces.FacesException: javax.el.ELException: /UC0001/results.xhtml: For input string: "id"

so I have to use prop[0] for example.

Entity class here:

@Name(value = "property")
public class Bn_property implements Serializable {
     private static final long serialVersionUID = 1L;

     @Id
     @GeneratedValue(strategy=GenerationType.AUTO)
     @Column(unique=true, nullable=false)
     private int id;

         public int getId() {
          return this.id;
     }

     public void setId(int id) {
          this.id = id;
     }

     private String name;

         public String getName() {
          return this.name;
     }

     public void setName(String name) {
          this.name = name;
     }

Can you help me with this ?