Sequence generation by Groovy expression

Today I am going to explain how to generate sequence with the help of GroovyExpression. For that one go to respective entity object, in that select respective attribute. For that attribue in proprty inspector set these properties in value section.

updatable: While New
 and
Default Value: (new oracle.jbo.server.SequenceImpl("Emp_SeqName",adf.object.getDBTransaction())).getSequenceNumber()