$Id$

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  JAKARTA COMMONS  - SIMPLESTORE
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APPROACH:
1. Provide a simple and powerful interface to store objects, retrieve 
and remove them. The focus is on simple to integrate and fast in processing!

2. Implement some realistic O/R framework which uses #1 for fast memory and
for i.e. a DB for persistence.

TODO:

- Add a OIDGenerator interface and default impl.
OID interface to generate a unique ObjectID. The
implementation can be Random, Auto-Increment, s.o. 
(GF)

- Add a mapping interface and a default impl of "MetaClass" 
(JB)

- Add relations. The same as for validators. To 
abort transactions and report errors, if some value
is invalid. This is happens also in MetaClass.

- Remove method "convert" from Proxy, add a converter 
interface and a default impl. Separate "converter" and 
"object state"! Also "MetaObject" is not a very good name.
Better would be something like "PersistentObjectState" (vs.
StateManager in JDO).

- Add PersitenceManager and PersitenceManagerFactory 
interfaces and default impl.

- Implement a rollback method for SoftRefMemoryStore 
in TransactionImpl. Not tested yet, but it's trivial
just clone and copy.

- Add synchronization  of transaction (Listeners) methods 
and transaction state Constants to the Transaction 
interface. No implementation so far only interface definitions
like in JTA.

- Make Proxy more abstract, to add interceptors for security and
distributed objects. Trivial, add a parameter "List of interceptors".
Interceptor implements "InvocationHandler".

- Finders (I have no good ideas about finders at this time), but no SQL.
Some procedure name at this time.

- Add suport for class instances (ByteCode generation and "*.class"
transformations). I think this is optional.

-Some limited implementation for JDO interfaces, because this is very
close to JDO.

Initial committers:

Gerhard Froehlich (g-froehlich@gmx.de)
Juozas Baliuka (baliuka@mwm.lt)