Struts2-json-plugin serialization issue with a Hibernate backed JPA entity

[Ken McWilliams]

I have a JPA entity, which hibernate is proxying.  

The following action works as it explicitly states the properties to
include, however what I would much rather do is use excludeProperties to
remove the problematic property. The problem property when serialized
causes a "Positioned Update not supported" exception.

The interesting thing is, all the properties on the entity class are
persisted correctly if explicitly included.

Looking in the  the debugger shows there is a property called
"$JAVASSIST_READ_WRITE_HANDLER" of type FieldInterceptorImpl which
Hibernate/JPA adds to the entity. I'm pretty sure this is what is
causing it to fail.


I've tried the following: 
    @Action(value = "list-clients", results = {
        @Result(type = "json", params = {
            "excludeProperties",
            "list\\[.*\\]\\.\\$JAVASSIST_READ_WRITE_HANDLER.*"
        })
    })

but with no luck.  Following is my action and the entity class.

 

Here is my action (In a _working_ state):
/////////////////////////////
@ParentPackage("json-default")
@Result(type = "json")
public class ListTable extends ActionSupport {

    @EJB
    private ClientService clientService;
    private List list;

    @Action(value = "list-clients", results = {
        @Result(type = "json", params = {
            "includeProperties",
            "list\\[.*\\]\\.name, list\\[.*\\]\\.id, list\\[.*\\]\
\.timelogCollection\\..*" 
        })
    })
    public String listClients() {
        list = clientService.list();
        return SUCCESS;
    }

    public List getList() {
        return list;
    }
}
/////////////////////////////

Here is the entity:
/////////////////////////////
@Entity
@Table(name = "client")
@XmlRootElement
@NamedQueries({
    @NamedQuery(name = "Client.findAll", query = "SELECT c FROM Client
c"),
    @NamedQuery(name = "Client.findById", query = "SELECT c FROM Client
c WHERE c.id = :id"),
    @NamedQuery(name = "Client.findByName", query = "SELECT c FROM
Client c WHERE c.name = :name")})
public class Client implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @NotNull
    @Column(name = "id")
    private Integer id;
    @Size(max = 45)
    @Column(name = "name")
    private String name;
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "clientId")
    private Collection<Timelog> timelogCollection;

    public Client() {
    }

    public Client(Integer id) {
        this.id = id;
    }

    public Integer getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    @XmlTransient
    public Collection<Timelog> getTimelogCollection() {
        return timelogCollection;
    }

    public void setTimelogCollection(Collection<Timelog>
timelogCollection) {
        this.timelogCollection = timelogCollection;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id
fields are not set
        if (!(object instanceof Client)) {
            return false;
        }
        Client other = (Client) object;
        if ((this.id == null && other.id != null) || (this.id != null
&& !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "com.aerose.kentimekeeper.db.Client[ id=" + id + " ]";
    }
    
}
/////////////////////////////


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