cascade=CascadeType.REFRESH with many to one relation

msi_333 · **Posted:** Sun May 09, 2010 9:35 pm

If any entity x related to entity y . and x refresh function called , y refresh function is called automatically. refresh means reload the values from database .

Code:

package com.codemiles.jpa;

import java.util.Collection;
import java.util.Date;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.OneToMany;
@Entity
@Table(name="COURSE")
public class Course implements java.io.Serializable{
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    @Id
    private long Id;
    private String name;
    private Long credit;
    private Date startDate;
    private String department;
    @OneToMany(mappedBy="course",cascade=CascadeType.REFRESH)
    private Collection<Student_Course> student_courses;
 
    public  long getId() {
        return Id;
    }
    public void setId( long id) {
        Id = id;
    }
    @Column(name="NAME")
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    @Column(name="CREDIT")
    public Long getCredit() {
        return credit;
    }
    public void setCredit(Long credit) {
        this.credit = credit;
    }
    @Column(name="START_DATE")
    public Date getStartDate() {
        return startDate;
    }
    public void setStartDate(Date startDate) {
        this.startDate = startDate;
    }
    @Column(name="DEPARTMENT")
    public String getDepartment() {
        return department;
    }
    public void setDepartment(String department) {
        this.department = department;
    }
    public void setStudent_courses(Collection<Student_Course> student_courses) {
    this.student_courses = student_courses;
    }
    public Collection<Student_Course> getStudent_courses() {
    return student_courses;
    }
   
}

 

cascade=CascadeType.REFRESH with many to one relation

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