ex6_33.txt

j2ee core design patterns

Example 6.33 Auto-populating ContextObject: RequestContextFactory
// Context Object Factory
public class RequestContextFactory {

  . . .

  public RequestContext createRequestContext(Class contextClass,
      ServletRequest request) {
    RequestContext requestContext = null;
    try  {
      // Instantiate ContextObject Class
      requestContext = (RequestContext) contextClass.newInstance();
                        
      // Using Introspection, populate the values of ContextObject from 
      // request instance
      AutoPopulateRequestContext.populateBean(requestContext, request);
    } catch(java.lang.InstantiationException e) { 
      // Handle Exception
    } catch(java.lang.IllegalAccessException e) {
      // Handle Exception
    }
    return requestContext;
  }
}