Process for building SessionFactory

gistfile1.txt

Build ServiceRegistry
---------------------

Map config = ...;

A) ServiceRegistry serviceRegistry = 
    new ServiceRegistryBuilder( config )
        ...
        .buildServiceRegistry();

B) ServiceRegistry serviceRegistry = 
    new ServiceRegistryBuilder()
        .setConfigurationData( config )
        .setOption( Environment.SHOW_SQL, true )
        .buildServiceRegistry();

Questions:
1) Will there need to be a Jpa-specific ServiceRegistry (e.g., configured w/ 
   JPA-specific listeners?
2) Emmanuel suggested using something like the following to set the default 
   services for JPA:
     JPAWasher.wash(builder);
   GB: JPAWasher would live in a different package, so ServiceRegistryBuilder 
       would have to have public setters (maybe OK for a builder).

Build MetadataSources:
----------------------

MetadataSources sources = 
         new MetadataSources( serviceRegistry )
            .addAnnotatedClass( Order.class )
            .addResource( "OrderLine.hbm.xml" )
            ...;

1) Does it make sense that MetadataSources could have some resources using 
   hibernate-mapping-4.0.xsd and others using orm_2_0.xsd?
2) Should there need to be a JpaMetadataSources?

Build Metadata:
---------------

A) Metadata metadata =
        sources
           .getMetadataBuilder()
              .setNamingStrategy( namingStrategy )
              ... // other config stuff
              .build();

B) Metadata metadata = 
        new MetadataBuilder()
            .setNamingStrategy( namingStrategy )
            ... // other config stuff
            .build( sources );

   (makes it absolutely clear that the namingStrategy is 
    associated with the MetadataBuilder, not w/ MetadataSources)

C) Metadata metadata = sources.buildMetadata( new NamingStrategy() );

   (this is OK if there's no need for a MetadataBuilder)
   (also allows metadata to be built from the same source multiple 
    times using different naming strategies)

1) Would there be a need for a JpaMetadataBuilder? If there is a 
JpaMetadataSources or some other way to indicate "jpa" sources, then 
A) could get the JpaMetadataBuilder.

Build SessionFactory:
---------------------

SessionFactory sf = metadata.buildSessionFactory();

I like that. Better idea.