Class Test{

private String testId;
private String testName;
private String testingEntityId;
private String testSeqNum;

..... setter and getter methods.....
}

mapping file...

<class name="Test" table="Test">
     <id name="testId" type="string">
            <column name="TEST_ID" length="15" />

            <generator class="sequence">
         <param name="sequence">TEST_SEQ</param>
       </generator>
        </id>
     <property name="testName" type="string">
          <column name="TEST_NAME" not-null="true"/>
     </property>

     <property name="testingEntityId" type="string">
          <column name="TEST_ENTITY_ID" not-null="true"/>
     </property>
   
    <property name="testSeqNum" type="string">
          <column name="TEST_SEQ_NUM" not-null="true"/>
     </property>

</class>