package shadowingfly; 

import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.Transient; 

import org.hibernate.Session; 
import org.hibernate.SessionFactory; 
import org.hibernate.Transaction; 
import org.hibernate.cfg.AnnotationConfiguration; 
import org.hibernate.cfg.Configuration; 

@Entity 
public class Department { 
private int id; 
private int pid; 
private Department parent;// 此属性为暂态 从数据库拿到对象后必须手工赋值(封装在存取器里) 
private String name; 
private boolean isRoot; 
private String description;// 备注 

public Department(Department parent, String name, boolean isRoot, 
String description) { 

this.description = description; 
this.setParent(parent); 
this.name = name; 
this.isRoot = isRoot; 
} 

public Department() { 

} 

@Id 
@GeneratedValue(strategy = GenerationType.TABLE) 
public int getId() { 
return id; 
} 

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

@Transient 
// 从数据库拿到后手工赋值该属性 
public Department getParent(SessionFactory sf) { 
if (this.parent != null || this.isRoot == true || this.isTransient()) 
return parent; 
else { 
Session s = sf.openSession(); 
Transaction tran = s.beginTransaction(); 
Department p = (Department) s.get(Department.class, this.getPid()); 
tran.commit(); 
s.close(); 
this.parent = p; 
return p; 
} 
} 

public void setParent(Department parent)// 该方法内给pid赋值 
{ 
this.parent = parent; 
this.setPid(parent.id); 
} 

public String getName() { 
return name; 
} 

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

public boolean isRoot() { 
return isRoot; 
} 

public void setRoot(boolean isRoot) { 
this.isRoot = isRoot; 
} 

public String getDescription() { 
return description; 
} 

public int getPid() { 
return pid; 
} 

public void setPid(int pid) { 
this.pid = pid; 
} 

public void setDescription(String description) { 
this.description = description; 
} 

@Transient 
public boolean isTransient() { 
return getId() < 1; 
} 

}