Bonsoir à tous,
S'il vous plait, j'ai besoin d'aide. J'essaie de créer, avec JPA, une relation bidirectionnelle OneToMany, mais j'ai les erreurs suivantes:
"[EclipseLink-63] : The instance creation method [entity.OrderLine.], with no parameters, does not exist, or is not accessible. [EclipseLink-28019] : Deployment of PersistenceUnit [simple-jpaPU] failed. Close all factories for this PersistenceUnit."

Code : Sélectionner tout - Visualiser dans une fenêtre à part
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package entity;
import java.util.*;
import java.io.Serializable;
import javax.persistence.*;
import org.eclipse.persistence.annotations.TimeOfDay;
 
/**
 *
 * @author berra
 */
@Entity
public class Order implements Serializable {
 
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    @Temporal(TemporalType.TIMESTAMP)
    private Date creationDate;    
    @OneToMany(mappedBy = "o")
    private   List<OrderLine>  orderLines; 
 
    public Date getCreationDate() {
        return creationDate;
    }
 
    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }
 
    public List<OrderLine> getOrderLines() {
        return orderLines;
    }
 
    public void setOrderLines(ArrayList<OrderLine> orderLines) {
        this.orderLines = orderLines;
    }
 
    public Order(Date creationDate) {
        this.creationDate = creationDate;
    }
 
 
 
 
 
    public Long getId() {
        return id;
    }
 
    public void setId(Long id) {
        this.id = id;
    }
 
    @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 Order)) {
            return false;
        }
        Order other = (Order) 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 "entity.Order[ id=" + id + " ]";
    }
 
}
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package entity;
 
import java.io.Serializable;
import javax.persistence.*;
 
/**
 *
 * @author berra
 */
@Entity
@Table(name="orderline_table")
public class OrderLine implements Serializable {
 
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
 
    private String item; 
    private  Double unitPrice;   
    private Integer quantity;
 
    @ManyToOne
    Order o; 
 
    public String getItem() {
        return item;
    }
 
    public void setItem(String item) {
        this.item = item;
    }
 
    public Double getUnitPrice() {
        return unitPrice;
    }
 
    public void setUnitPrice(Double unitPrice) {
        this.unitPrice = unitPrice;
    }
 
    public Integer getQuantity() {
        return quantity;
    }
 
    public void setQuantity(Integer quantity) {
        this.quantity = quantity;
    }
 
    public OrderLine(String item, Double unitPrice, Integer quantity) {
        this.item = item;
        this.unitPrice = unitPrice;
        this.quantity = quantity;
    }
 
 
 
    public Long getId() {
        return id;
    }
 
    public void setId(Long id) {
        this.id = id;
    }
 
    @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 OrderLine)) {
            return false;
        }
        OrderLine other = (OrderLine) 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 "entity.OrderLine[ id=" + id + " ]";
    }
 
}
S'il vous plait, est-ce que quelqu'un peut m'aider ?