One of the entities developed had a Numeric field as primary key, with a custom code to populate it rather than utilizing any auto generation strategy of JPA

if(ledegrHead.getLedgerHeadId()==null){
ledegrHead.setLedgerHeadId(financePersistence.getNextLedgerHeadId());
}

I wrote junit to test this and obviously it passed -if ID was set to null it would generate an ID.
But the moment I integrated it with flex, things went bad and it would NOT generate the expected “First” ID.
Reason – I had used autobinding on flex side –

[RemoteClass(alias="com.school.questionbank.Question")]
[Bindable]

This resulted in “auto” initialization of integer filed to zero and hence the condition of ==null would always fail. Solution? -explicit check for null as well as zero:

if(ledegrHead.getLedgerHeadId()==null||ledegrHead.getLedgerHeadId()<=0){
ledegrHead.setLedgerHeadId(financePersistence.getNextLedgerHeadId());
}