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regarding copyright ownership.  The ASF licenses this file
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"License"); you may not use this file except in compliance
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To map a domain class with annotations, create a new class in `src/main/groovy/` and use the annotations defined as part of the EJB 3.0 spec (for more info on this see the http://annotations.hibernate.org/[Hibernate Annotations Docs]):

[source,groovy]
----
package com.books;

import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.Id;

@Entity
public class Book {
    private Long id;
    private String title;
    private String description;
    private Date date;

    @Id
    @GeneratedValue
    public Long getId() {
        return id;
    }

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

    public String getTitle() {
        return title;
    }

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

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }
}
----

Then register the class with the Hibernate `sessionFactory` by adding relevant entries to the `grails-app/conf/hibernate.cfg.xml` file as follows:

[source,xml]
----
<!DOCTYPE hibernate-configuration SYSTEM
  "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <mapping package="com.books" />
        <mapping class="com.books.Book" />
    </session-factory>
</hibernate-configuration>
----
See the previous section for more information on the `hibernate.cfg.xml` file.

When Grails loads it will register the necessary dynamic methods with the class. To see what else you can do with a Hibernate domain class see the section on link:scaffolding.html[scaffolding].
