How to configure datasources in tomcat 4.1.12 to obtain OracleResultSets

Hi!
Since my application running under both OracleAS and Tomcat 4.1.12 should obtain connection pooling i tried to configure the application servers. Our application makes use of OracleResultSet. I configured OracleAS by editing the data-sources.xml file which works very well:
<data-source
class="com.evermind.sql.DriverManagerDataSource"
name="OracleDS"
location="jdbc/OracleCoreDS"
xa-location="jdbc/xa/OracleXADS"
ejb-location="jdbc/OracleDS"
connection-driver="oracle.jdbc.driver.OracleDriver"
username="scott"
password="tiger"
url="jdbc:oracle:thin:@testdb:1525:ORA5"
inactivity-timeout="30"
/>
The code for jndi lookup is here. It works fine when i cast ResultSet to OracleResultSet using OracleAS:
initCtx = new InitialContext();
envCtx = (Context) initCtx.lookup("java:comp/env");
dataSource = (DataSource) envCtx.lookup("jdbc/OracleDS");
con = dataSource.getConnection();
ResultSet rs = con.executeQuery("..");
OracleResultSet orars = (OracleResultSet)rs;
Then i configured tomcat 4.1.12 server.xml file:
<Resource name="jdbc/OracleDS" auth="Container" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/OracleDS">
<parameter><name>username</name><value>scott</value></parameter>
<parameter><name>password</name><value>tiger</value></parameter>
<parameter><name>driverClassName</name><value>oracle.jdbc.driver.OracleDriver</value></parameter>
<parameter><name>url</name><value>jdbc:oracle:thin:@testdb:1525:ORA5</value></parameter>
</ResourceParams>
The same source for jndi lookup brings up a ClassCastException at line
OracleResultSet orars = (OracleResultSet)rs;
Therefore i tried to add a new parameter in tomcats server.xml:
<parameter><name>factory</name><value>com.evermind.sql.DriverManagerDataSource</value></parameter>
Now following exceptions occurs:
javax.naming.NamingException: Could not create resource factory instance, com.evermind.sql.DriverManagerDataSource
java.lang.Object org.apache.naming.factory.ResourceFactory.getObjectInstance(java.lang.Object, javax.naming.Name, javax.naming.Context, java.util.Hashtable)
I have oc4j.jar and classes12.jar in tomcats home directory under config/lib.
How should i configure tomcat to be able to use connection pooling and OracleResultSets?
Thanks in advance!
thomas

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