ex6_45.txt

j2ee core design patterns

Example 6.45 Transformer Handler Strategy: ApplicationControllerImpl
// Application Controller implementation to handle Web Application 
// Requests, using View
// Transformer Handler Strategy
public class ApplicationControllerImpl 
    implements ApplicationController {

  . . .

  public void handleResponse(RequestContext requestContext,
      ResponseContext responseContext, ServletContext servletContext) {

    ViewMapper viewMapper = ViewMapper.getInstance();
    String stylesheet = viewMapper.getViewTemplate(requestContext,
        responseContext.getLogicalViewName());

    TransformHelper helper;
    helper = new TransformHelper();

    Reader xmlReader  = new StringReader(
        (String)responseContext.getData());
    InputStream xslStream =
        servletContext.getResourceAsStream(stylesheet);
    helper.transform(requestContext.getRequest(),
        responseContext.getResponse(), xmlReader, xslStream);
  }
}