Using Sequence of Oracle in Hibernate

For using sequence create in oracle in hibernate, make following confguration

<class name="className" table="tableName"
schema="databasename">
<id name="id" type="java.lang.Long"
unsaved-value="null" column="ID">
<generator
class="sequence">
<param
name="sequence">USERS_SEQ</param>
</generator>
</id>