package entity.company2;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;

/**
 * 
 *         {@link Employee} instances related to {@link Department}
 * 
 */
@Entity
@Table(uniqueConstraints={@UniqueConstraint(columnNames={"staffNumber"})})
public class Employee {

  @Id
  @GeneratedValue
  public Long getId() {return id;}
  protected void setId(Long id) {this.id = id;}
  private Long id;

  public int getStaffNumber() { return staffNumber;}
  public void setStaffNumber(int staffNumber) { this.staffNumber = staffNumber;}
  int staffNumber = Integer.MIN_VALUE;

  public String getCname() { return cname;}
  public void setCname(String cname) { this.cname = cname;}
  private String cname; // Common name
  
  /**
   * @return Laptop possibly "owned" by {@link Employee}.
   */
  @OneToOne(cascade={CascadeType.ALL})
  public Laptop getLaptop() { return laptop;}
  public void setLaptop(Laptop laptop) {this.laptop = laptop;}
  private Laptop laptop;// Workstation for employees.
  
  protected Employee(){}
  
  public Employee(final int staffNumber, final String cname) {
    setStaffNumber(staffNumber);
    setCname(cname);
  }
  @Override
  public boolean equals(Object other) {
    if (this == other) {
      return true;
    } else if (Integer.MIN_VALUE == getStaffNumber()) {
      return false;
    } else if (other instanceof Employee) {
      final Employee that = (Employee) other;
      return this.getStaffNumber() == that.getStaffNumber();
    } else {
      return false;
    }
  }
  @Override
  public int hashCode() {
    if (Integer.MIN_VALUE == getStaffNumber()) {
      return System.identityHashCode(this);
    } else {
      return getStaffNumber();
    }
  }
}