RFR [JDK8]: 7169894: JAXP Plugability Layer: using service loader

[Paul Sandoz]

On Jun 21, 2012, at 8:02 PM, Joe Wang wrote:
> 
>> 
>> On the implementation changes then I agree with Paul's comment that there is a lot of duplication. I realize you have inherited some technical debt but now seems a good opportunity to clean this up instead of changing essentially the same code in lots of places.
> 
> As discussed, it's security required.
> 

What exactly were the security reasons? is it related to something messing around with the static state?

I still think we can factor out some common functionality. One solution is a deferral: define in the same package a public class that access information in a package private class.

If you stick to using ServiceLoader.load you can avoid using SecurtySupport to obtain the TCCL for the service loading case.



>> 
>> I don't understand the need for the Class.forName in findServiceProvider as I thought this method should just use ServiceLoader.
> 
> For XPath, Transformer, Datatype and Validation, it's possible get rid of that since the factory finder is dedicated to a single factory.  For the parsers and stream, it's shared by multiple factories, Class.forName is used to return Class by name, or factory id.

But can the service interface class (factory id) be absent in the latter case? If not perhaps Class can be used instead.

Paul.