How can I access the database native java.sql.Connection?

I'm using WASCE as application server and defined a data source to PosgreSQL. I get the DB Connection from JNDI.

The problem is I want to access specific method in the PostgreSQL java.sql.Connection but WASCE wrapped this connection with their own Connection.

Specifically, I want to do something like this:

((org.postgresql.Connection)conn).addDataType("geometry","org.postgis.PGgeometry");
((org.postgresql.Connection)conn).addDataType("box3d","org.postgis.PGbox3d");

Is that possible? If yes, please share how.

EDIT:

I expect to have something like access to the original Connection from this wrapped Connection, but I can't find any un开发者_如何学JAVAtil now.

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Generally connections will be handled through a pool. In order to be handled (relatively) transparently you will get a proxy to the real connection. Therefore, you cannot successfully cast the connection directly. The connection pool may have an API that allows you to get to the underlying connection.

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You can try

((PooledConnection) conn).getConnection()

Or, since Java 1.6:

conn.unwrap(...)