[color=#000000]<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class
        name="comm.models.Author"
        table="AUTHOR">
        <id
            name="id"
            column="AUTHOR_ID" unsaved-value="0">
            <generator class="increment"/>
        </id>
        <property
            name="name"
            column="AUTHOR_NAME" not-null="true"/>
        <property
            name="nick"
            column="AUTHOR_NICK" not-null="true"/>
        <property
            name="password"
            column="AUTHOR_PASSWORD" not-null="true"/>
        <property
            name="email"
            column="AUTHOR_EMAIL" not-null="true" unique="true"/>
        <property
            name="address"
            column="AUTHOR_ADDRESS"/>
        <property
            name="selftext"
            column="AUTHOR_SELFTEXT"/>
        <property
            name="dateOfBirth"
            column="AUTHOR_DATEOFBIRTH" type="date" not-null="true"/>
        <property
            name="dateOfJoin"
            column="AUTHOR_DATEOFJOIN" type="date" not-null="true"/>
        <set name="messages" table="MESSAGES" lazy="true" cascade="save-update">
            <key column="AUTHOR_ID"/>
            <one-to-many class="comm.models.Message"/>
        </set>
    </class>
</hibernate-mapping>[/color]

[color=#000000]<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class
        name="comm.models.Message"
        table="MESSAGES">
        <id
            name="id"
            column="MESSAGE_ID" unsaved-value="0">
            <generator class="increment"/>
        </id>
        <property
            name="text"
            column="MESSAGE_TEXT"/>
        <many-to-one name="messageAuthor" column="AUTHOR_ID"/>
    </class>
</hibernate-mapping>[/color]

[color=#000000]        Session session = HibernateUtil.getSessionFactory().openSession();
        Transaction tx = session.beginTransaction();
        Author myAuthor = new Author();
        myAuthor.setName("Supratim");
        myAuthor.setDateOfBirth(new Date());
        myAuthor.setEmail("testmail@testmail.com");
        myAuthor.setDateOfJoin(new Date());
        myAuthor.setNick("sup");
        myAuthor.setPassword("testpass");
        session.saveOrUpdate(myAuthor);
        Message message = new Message();
        message.setText("Hello World");
        message.setMessageAuthor(myAuthor);
        session.saveOrUpdate(message);
        tx.commit();
        session.flush();
        session.close();[/color]

[color=#BF0000]SEVERE: Duplicate entry 'testmail@testmail.com' for key 'AUTHOR_EMAIL'[/color]

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

[color=#000000]package comm.models;

import java.io.Serializable;
import java.util.Date;
import java.util.Set;

/**
*
* @author supratim
*/
public class Author implements Serializable {

    private Long id;

    private String name;
    private String nick;
    private String password;
    private String email;
    private String address;
    private String selftext;
    private Date dateOfBirth;
    private Date dateOfJoin;

    private Set<Message> messages;

    public Author() {
    }

   


    public Set getMessages() {
        return messages;
    }

    public void setMessages(Set messages) {
        this.messages = messages;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public Date getDateOfBirth() {
        return dateOfBirth;
    }

    public void setDateOfBirth(Date dateOfBirth) {
        this.dateOfBirth = dateOfBirth;
    }

    public Date getDateOfJoin() {
        return dateOfJoin;
    }

    public void setDateOfJoin(Date dateOfJoin) {
        this.dateOfJoin = dateOfJoin;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public Long getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public String getNick() {
        return nick;
    }

    public void setNick(String nick) {
        this.nick = nick;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getSelftext() {
        return selftext;
    }

    public void setSelftext(String selftext) {
        this.selftext = selftext;
    }   

}[/color]

[color=#000000]/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package comm.models;

import java.io.Serializable;

/**
*
* @author supratim
*/


public class Message implements Serializable {

    private Long id;   
    private String text;
    private Author messageAuthor;

    public Message() {
    }

    public Long getId() {
        return id;
    }

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

    public Author getMessageAuthor() {
        return messageAuthor;
    }

    public void setMessageAuthor(Author messageAuthor) {
        this.messageAuthor = messageAuthor;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

   

}

[/color]