[Objectbridge-developers] [ann] ojb 0.1.70 released

[Thomas M. <tho...@ho...>]

Dear OJB fans,

<hype>
there's a brand new release waiting for you with a bunch of new and
interesting features!
</hype>

The new Version brings two major enhancements:
- first step towards persistent collections (a DList is already working)
- Full support for polymorphisms and extents.

New features:
- Support for polymorphism. It is now possible to define extents
consisting
  of several subclasses. The mechanism supports Interfaces as well as
base-classes.
  There are still things that don't support polymorphism:
  PersistenceBroker.getIteratorByQuery and
PersistenceBroker.getPkEnumerationByQuery.
  (They are Wrappers to JBDC ResultSets and I have no idea how to make
ResultSets polymorph ;-)
  There is a new TestClass test.ojb.broker.PolymorphicExtents testing
and
  demonstrating all relevant techniques.
- first step towards persistent Collection implementation. 
  I started with a DListImpl. Right now it does not implement more than
add(),
  but persistence support should work...
- A SequenceManager responsible for generating unique values for
primary-key columns.
  This class is aware of extents and maintains uniqueness of pk-values
accross any
  number of tables.

changes:
- class ojb.broker.query.Criteria allows adding of more filtering
criteria. (credits to Sascha)  

Open bugs:
- Two testmethods in test.ojb.odmg.OdmgExamples still report failures.
  in my development environment (VisualAge) I can't reproduce them...  


I hope everything works as expected... If something is missing or does
not work, just drop me a line.

enJoy,

Thomas