Java Tutorial/Hibernate/Cascade Action

Bag Inverse Cascade Delete Orphan

File: Main.java

   <source lang="java">

import org.hibernate.Session; public class Main {

 public static void main(String[] args) throws Exception {
   HibernateUtil hibernateUtil = new HibernateUtil();
   hibernateUtil
       .executeSQLCommand("create table Product(id int, name varchar, description varchar, price decimal(6,2), supplierid int)");
    
   hibernateUtil
   .executeSQLCommand("create table Supplier (id int , name varchar)");
   hibernateUtil
   .executeSQLCommand("create table Software(id int, name varchar, description varchar, price decimal(6,2), supplierid int, version varchar)");
   
   Session session = hibernateUtil.getSession();
   Supplier superCorp = new Supplier();
   superCorp.setName("Supplier1");
   session.save(superCorp);
   
   Supplier megaInc = new Supplier();
   megaInc.setName("Supplier2");
   session.save(megaInc);        
   Product mouse = new Product("Product1","first product", 20.0);
   mouse.setSupplier(superCorp);
   superCorp.getProducts().add(mouse);
   session.flush();
   Product mouse2 = new Product("Product2","second product", 22.0);
   mouse2.setSupplier(superCorp);
   superCorp.getProducts().add(mouse2);        
   
   Product keyboard = new Product("Product3", "third product", 30.0);
   keyboard.setSupplier(megaInc);
   megaInc.getProducts().add(keyboard);
   Software webBrowser = new Software("Web Browser","new browser", 75.0, "2.0");
   webBrowser.setSupplier(superCorp);
   superCorp.getProducts().add(webBrowser);
   Software email = new Software("Email","email client", 49.99, "4.1 Edition");
   email.setSupplier(megaInc);
   megaInc.getProducts().add(email);    
   session.flush();
   session.close();
   hibernateUtil.checkData("select * from Product");
   hibernateUtil.checkData("select * from Software");
   hibernateUtil.checkData("select * from Supplier");
 }

}</source>

Cascade.All

File: Main.java

   <source lang="java">

import java.util.HashSet; import org.hibernate.Session; public class Main {

 public static void main(String[] args) throws Exception {
   HibernateUtil hibernateUtil = new HibernateUtil();
   hibernateUtil
       .executeSQLCommand("create table speakers (uid int, firstName varchar,lastName varchar, event_id int);");
   hibernateUtil
       .executeSQLCommand("create table locations (uid int, name varchar, address varchar,  event_id int);");
   hibernateUtil
       .executeSQLCommand("create table attendees (uid int, firstName varchar, lastName varchar,  event_id int);");
   hibernateUtil
       .executeSQLCommand("create table events (uid int , name varchar, start_date date, duration integer,location_id int);");
   Session session = hibernateUtil.getSession();
   Event e = new Event();
   e.setName("testSave");
   Location l = new Location();
   l.setName("building 1");
   e.setLocation(l);
   e.setSpeakers(new HashSet());
   e.getSpeakers().add(new Speaker("John", "Doe"));
   e.setAttendees(new HashSet());
   e.getAttendees().add(new Attendee("John", "Smith"));
   //session.save(l);
   session.save(e);
 //  session.flush();
   
   session.close();
   hibernateUtil.checkData("select * from events");
   hibernateUtil.checkData("select * from speakers");
   hibernateUtil.checkData("select * from locations");
   hibernateUtil.checkData("select * from attendees");
 }

}</source>