Mapping POJO with persistence layer using hibernate mapping document

Each persistent class needs to be mapped with its configuration file. Following code represents Hibernate mapping file for AppLabsUser class.

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 2.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd"> <hibernate-mapping>
	<class name="org.applabs.hibernate.quickstart.javadeploy" table="applabsuser">
		<id column="USER_ID" name="id" type="java.lang.Long">
			<generator class="sequence"/>
		</id>
		<property column="USER_NAME" length="255" name="userName" not-null="true" type="java.lang.String"/> <property column="USER_PASSWORD" length="255" name="userPassword" not-null="true" type="java.lang.String"/> <property column="USER_FIRST_NAME" length="255" name="userFirstName" type="java.lang.String"/> <property column="USER_LAST_NAME" length="255" name="userLastName" type="java.lang.String"/> <property column="USER_EMAIL" length="255" name="userEmail" type="java.lang.String"/> <property column="USER_CREATION_DATE" length="10" name="userCreationDate" type="java.util.Date"/> <property column="USER_MODIFICATION_DATE" length="10" name="userModificationDate" type="java.util.Date"/>
	</class>
</hibernate-mapping>

One can also generate Hibernate mapping documents using Hibernate extension toolset. Hibernate mapping documents are straight forward. The <class> element maps a table with corresponding class. The <id> element represents the primary key column, and its associated attribute in the domain object. The <property> elements represent all other attributes available in the domain object.