Re: [OJB-developers] Why use PersistenceBrokerImpl instead of PersistenceBroker in the constructor for StatementManager/connectionManager?

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

Hi John,

John Wang wrote:

 > As I want to override the functins of PersistenceBrokerImpl to expose
 > more functions, I am wondering that in the constructor for:
 >
 > StatementManager.java
 >
 > ConnectionFactoryDefaultImpl.java
 >
 > ConnectionManager.java
 >
 > SequenceManager.java
 >
 > ...
 >
 > They all use the PersistenceBrokerImpl as a parameter in the
 > constructor, instead of using PersistenceBroker. I am wondering is there
 > specific reason to use impl instead of interface?
 >


I'm not sure if it is always necessary to pass PBImpl instead PB
objects. But there are at least several places where it's obligatory to
pass PBImpl.
PBImpl provide several things not present in PB interface.

BUT: if you derive modified Brokers that extend PBImpl there will be no
problems.

BTW:
What additional functionality do you want to expose? Maybe its useful
for others too?

cu,

Thomas


 >
 >
 > Best regards,
 >
 > John W
 >
 >
 >