Mock Oracle CallableStatement.getCursor()

I'm dealing with an Oracle 10g database and the following stored procedure is provided:

 procedure get_synopsis (
   p_id in  my_schema.products.p_id%type,
   p_synopses out sys_refcursor);  -- cursor of - synopsis_type, synopsis_text

In my Java code I prepare the statement in this way:

String idForDb = fromIdUrlToIdDb(prodIdUrl); 
statement.registerOutParameter(1, OracleTypes.VARCHAR);
statement.setString(1, idForDb );
statement.registerOutParameter(2, OracleTypes.CURSOR);

And I get the data I need in this way:

String defaultSyn, nonDefSyn;

String returnedId = ((OracleCallableStatement)stm).getString(1);
try ( ResultSet synopses = ((OracleCallableStatement)stm).getCursor(2) ){ // p_synopses - cursor of: synopsis_type, synopsis_text

    while( synopses!=null && synopses.next() ){

        String type = synopses.getString(1) != null ? synopses.getString(1).toUpperCase() : null;

        if( type != null ){

            StringBuilder sb = new StringBuilder();
            BufferedReader br = new BufferedReader( synopses.getClob(2).getCharacterStream() );
            String line;

            while ((line = br.readLine()) != null) {
               sb.append(line).append("\n");
            }

            if("DEFAULT".equals(type)){
                defaultSyn = sb.toString();
            }else if("NONDEFAULT".equals(type)){
                nonDefSyn = sb.toString();
            }

            // ...
        }
    }
}

In my tests how can I mock (OracleCallableStatement)stm.getCursor(2)?

I'm trying with org.jmock.Mockery but without success:

Mockery mockery_inner = new Mockery();
final ResultSet mocked_resultset = mockery_inner.mock(ResultSet.class);
mockery_inner.checking(new Expectations() {{
    allowing(mocked_resultset).getString(1); will(returnValue("TEST_SYNOPSES-TYPE"));
    allowing(mocked_resultset).getClob(2); will(returnValue("TEST_CLOooooooB"));
}});

Mockery mockery = new Mockery();
final CallableStatement statement = mockery.mock(CallableStatement.class);

mockery.checking(new Expectations() {{
    allowing(statement).getString(1); will(returnValue("TEST_RETURNED-PROD-ID"));
    allowing(statement).getCursor(2); will(returnValue(mocked_resultset));  // cannot find symbol getCursor(int). Location: interface java.sql.CallableStatement
}});   

Reason clearly is: cannot find symbol getCursor(int). Location: interface java.sql.CallableStatement.

If I try allowing((OracleCallableStatement)statement).getCursor(2) I get "java.lang.ClassCastException: com.sun.proxy.$Proxy6 cannot be cast to oracle.jdbc.driver.OracleCallableStatement". Note: OracleCallableStatement is not an interface and thus cannot be mocked with Mockery.

I'm trying to use a "manual" mock but I'm having problems creating an instance..

class MockOracleCallableStatement implements OracleCallableStatement {

    ResultSet mocked_resultset;

    public MockOracleCallableStatement(){

        Mockery mockery_inner = new Mockery();
        mocked_resultset = mockery_inner.mock(ResultSet.class);
        mockery_inner.checking(new Expectations() {{
            allowing(mocked_resultset).getString(1); will(returnValue("DEFAULT")); // will pick value from an array
            allowing(mocked_resultset).getClob(2); will(returnValue("TEST_CLOooooooooooB"));
        }});
    }

    @Override
    ResultSet getCursor(int paramIndex) throws SQLException{
        return mocked_resultset;
    }
    @Override
    String getString(int paramIndex) throws SQLException{
        return "mockedGetString1--test";
    }
}