S2JDBC で PostgreSQL の CopyManager を取得する方法

gistfile1.java

public CopyManager getCopyManager() throws SQLException {
    Connection conn = ((JdbcManagerImplementor) jdbcManager).getDataSource().getConnection();
    XAConnection xaConn = ((ConnectionWrapperImpl) conn).getXAConnection();
    Connection pgConn = xaConn.getConnection();
    return ((PGConnection) pgConn).getCopyAPI();
}