[jboss-user] [JBoss Seam] - one question about Interceptor

[diyun2008]

When I run example "icefaces",I debug class LoggedInInterceptor.But I 
found :
            
  |             Method method = invocation.getMethod();
  |             if ( method.getReturnType().equals(void.class) )
  |             {
  |                return null;
  |             }
  | 
Why "return null" not "return 'login'".I clicked link "http://localhost:8000/seam-registration/main.seam?cid=2" ,it did not return to "login" page.So I fixed "retrun null" above to "return 'login'",but it still did not return to "login" page.Through logging, I found if "Lifecycle.getPhaseId()!=PhaseId.INVOKE_APPLICATION",it will never be redirect to new page.How can I redirect to new page in Interceptor,and who can tell me how does Interceptor work?
Your appreciation!

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