<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC
   "-//Hibernate/Hibernate Mapping DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

<hibernate-mapping>
  <class
     name="hibernate.Message"
     table="MESSAGES">
   <id
      name="id"
      column="MESSAGE_ID">
      <generator class="increment"/>      
   </id>

    <property
       name="text" column="MESSAGE_TEXT"/>
   <many-to-one
       name="nextMessage"
       cascade="all"
       column="NEXT_MESSAGE_ID"/>
  </class>
</hibernate-mapping>

Message message = new Message("Hello World");
session.save(message);

WARNING: SQL Error: 233, SQLState: 23502
Dec 12, 2005 3:51:13 PM net.sf.hibernate.util.JDBCExceptionReporter logExceptions
SEVERE: ASA Error -195: Column 'NEXT_MESSAGE_ID' in table 'MESSAGES' cannot be NULL
Dec 12, 2005 3:51:13 PM net.sf.hibernate.JDBCException <init>
SEVERE: could not insert: [hibernate.Message#1]
com.sybase.jdbc2.jdbc.SybSQLException: ASA Error -195: Column 'NEXT_MESSAGE_ID' in table 'MESSAGES' cannot be NULL

package hibernate;

public class Message
{
    private Long id;
    private String text;
    private Message nextMessage;
   
    private Message(){};
    public Message( String text)
    {
        this.text = text;
    }
   
    /**
     * @return Returns the id.
     */
    public Long getId ( )
    {
        return id;
    }
    /**
     * @param id The id to set.
     */
    public void setId ( Long id )
    {
        this.id = id;
    }
    /**
     * @return Returns the nextMessage.
     */
    public Message getNextMessage ( )
    {
        return nextMessage;
    }
    /**
     * @param nextMessage The nextMessage to set.
     */
    public void setNextMessage ( Message nextMessage )
    {
        this.nextMessage = nextMessage;
    }
    /**
     * @return Returns the text.
     */
    public String getText ( )
    {
        return text;
    }
    /**
     * @param text The text to set.
     */
    public void setText ( String text )
    {
        this.text = text;
    }
}

Create table MESSAGES
(
MESSAGE_ID  INTEGER NOT NULL,
MESSAGE_TEXT  VARCHAR(36),
NEXT_MESSAGE_ID INTEGER,
)