public class Topic implements Serializable,Lifecycle {
   
    private static final Log log=LogFactory.getLog(Topic.class);

    /** identifier field */
    private Integer id;

    /** nullable persistent field */
    private Date time;

    /** nullable persistent field */
    private String title;

    /** nullable persistent field */
    private String name;

    /** full constructor */
    public Topic(Date time, String title, String name) {
        this.time = time;
        this.title = title;
        this.name = name;
    }

    /** default constructor */
    public Topic() {
    }

    public Integer getId() {
        return this.id;
    }

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

    public Date getTime() {
        return this.time;
    }

    public void setTime(Date time) {
        this.time = time;
    }

    public String getTitle() {
        return this.title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getName() {
        return this.name;
    }

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

    public String toString() {
        return new ToStringBuilder(this)
            .append("id", getId())
            .toString();
    }

    /* (non-Javadoc)
     * @see net.sf.hibernate.Lifecycle#onSave(net.sf.hibernate.Session)
     */
    public boolean onSave(Session s) throws CallbackException {
        Author au=new Author();
        au.setAge(22);
        au.setEmail("[email protected]");
        au.setName("LIren wang");
        Transaction tx=null;
        try {
            tx=s.beginTransaction();
            Object id=s.save(au);
            log.info("Saving  author ::: "+id);
            tx.commit();
        } catch (HibernateException e) {
           
        }
       
        return false;
    }

    /* (non-Javadoc)
     * @see net.sf.hibernate.Lifecycle#onUpdate(net.sf.hibernate.Session)
     */
    public boolean onUpdate(Session arg0) throws CallbackException {
        // TODO Auto-generated method stub
        return false;
    }

    /* (non-Javadoc)
     * @see net.sf.hibernate.Lifecycle#onDelete(net.sf.hibernate.Session)
     */
    public boolean onDelete(Session arg0) throws CallbackException {
        // TODO Auto-generated method stub
        return false;
    }

    /* (non-Javadoc)
     * @see net.sf.hibernate.Lifecycle#onLoad(net.sf.hibernate.Session, java.io.Serializable)
     */
    public void onLoad(Session arg0, Serializable arg1) {
        // TODO Auto-generated method stub
       
    }

}