"Java integration - web mining: Get Page"

Dear All,

I'm interested in using RM's capability in my own Java program. I want to use the 'Web Mining' extension available in RM in order to retrieve web pages and do further processing afterwards.

Through my program I can initialize RM already. Then I created the 'Get Page' operator and set up all the required parameters. OK, so now my problem is, how can I retrieve the result of 'Get Page' operator? In RM5 I can see that the output of 'Get Page' is a Document. But unfortunately, I cannot find Document even in the javadoc. Below is the my code so far.:

        RapidMiner.init();

        try
        {
            // Load dataset
            Operator op = OperatorService.createOperator("web:extract_html_text_content");
            op.setEnabled(true);
            op.setExpanded(true);
            op.setParameter("random_user_agent", "true");
            op.setParameter("url", "http://news.google.com");

            IOContainer container = op.apply( new IOContainer() );
        }

Can anyone help me on how to obtain the result from 'Get Page' operator?

Thank you!