[Hibernate] Bidirectional relationship

[Prasad Iyer]

Hi, Can somebody help me with the Bidirectional relationship. I have made this small example which I need to use I am using cascading update. But I think I am missing something. The kittens are not getting added. I am trying this with hypersonic database which then would be changed to Microsoft SQL Server. An early help would be highly appreciated. regards prasad chandrasekaran Following is my mapping file   <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd"> <hibernate-mapping> <!-- Cat Mapping --> <class name="org.presci.Cat" table="cat"> <id name="id"> <generator class="identity"/> </id> <property name="name"/> <bag name="kitten" inverse="true" cascade="all"> <key column="cat_id"/> <one-to-many class="org.presci.Kitten"/> </bag> <property name="age"/> </class> <!-- Kitten Mapping --> <class name="org.presci.Kitten" table="kitten"> <id name="id"> <generator class="identity"/> </id> <many-to-one name="cat" cascade="all" column="cat_id"/> </class> </hibernate-mapping>     ___________________________________________________ // This is my CatImpl.java file package org.presci;   import java.util.ArrayList;   import net.sf.hibernate.Session;   import net.sf.hibernate.SessionFactory;   import net.sf.hibernate.Transaction;   import net.sf.hibernate.cfg.Configuration;   import net.sf.hibernate.tool.hbm2ddl.SchemaExport;   /** * @File CatImpl.java   * @Created Aug 25, 2003 1:56:17 PM * @author prasadi   * * @Project : HibTapestry   * @Package : org.presci   * */   public class CatImpl {   private static SessionFactory sessionfactory;   static {   Configuration cfg = new Configuration();   try {   cfg.addFile("org/presci/default.hbm.xml");   sessionfactory = cfg.buildSessionFactory();   } catch (Exception ex) {   ex.printStackTrace();   }   }   public void add() {   Session session = null;   Transaction tx = null;   ArrayList lst = new ArrayList();   lst.add(new Kitten("kitten 1"));   lst.add(new Kitten("kitten 2"));   lst.add(new Kitten("kitten 3"));   lst.add(new Kitten("kitten 4"));   lst.add(new Kitten("kitten 5"));   lst.add(new Kitten("kitten 6"));   try {   session = sessionfactory.openSession();   tx = session.beginTransaction();   Cat cat = new Cat("Scarlet", lst, 3);   session.save(cat);   tx.commit();   } catch (Exception ex) {   try {   tx.rollback();   } catch (Exception iex) {   iex.printStackTrace();   }   ex.printStackTrace();   } finally {   try {   if (session != null)   session.close();   } catch (Exception ex) {   ex.printStackTrace();   }   }   }   public static void main(String arg[]) {   new CatImpl().add();   System.exit(0);   }   }