Flex Directly To JdbcService

I need to have a Flex form communicate with the LC database.  I see 4 ways to make this happen.

1. Have Flex use a RemoteObject call to a custom written process that actually invokes a JDBC operation
2. Have Flex use a RemoteObject call to a custom written process that uses the ExecuteScript activity to invoke the JDBC operation
3. Have Flex use a RemoteObject call to a custom Java service component that invokes the JDBC operation
4. Have Flex use a RemoteObject call to the JDBCService component directly

I have done 1, 2 & 3 and while those are fine in most cases, at some points, I find myself wanted to use (4).  Has anyone done (4)?  In theory, it shouldn't be that hard, the problem I have is that in looking at the component.xml file, it looks like it is calling special classes, such as

• com.adobe.idp.dsc.jdbc.bean.SqlStatementInfoBean
• com.adobe.idp.dsc.jdbc.bean.XmlDocumentInfoBean

which I would need to pass as part of the parameters in the Flex RemoteObject call.  Has one anyone done this?  Where would I find these classes and how would I create them within the Flex environment so that they could be used by the JdbcService?