How to set the sequence value while saving the record in OA Framework

This is a requirement where people are used to Oracle forms style generation of unique number.The unique identifier for the record is derived from a database sequence when user saves the record in an OAF page.Most of the OAF pages developed by me has the sequence automatically generated in the Create method of the EO when user navigates to the screen.

Drawback of that approach is if user navigates to the create t screen and doesn't click on apply button then the sequence value will elapse and wasted.To avoid this ,follow the approach below to simulate the Forms Style Generation of the unique Number.

In your entity object EOImpl.java write the below code.

Previous Approach :

public void create(AttributeList attributeList) {

super.create(attributeList);

OADBTransaction transaction = getOADBTransaction();

Number seqNo = transaction.getSequenceValue("FWK_TBX_EMPLOYEES_S");

setFileId(seqNo);

}

New Approach : Write the code in the setter method in EO.

public void setFileId(Number value) {

if (value == null) {

OADBTransaction transaction = getOADBTransaction();

value = transaction.getSequenceValue("FWK_TBX_EMPLOYEES_S");

  }

setAttributeInternal(FILEID, value);

}