HFSJ doubt :Pg:356

[georgy jacob]

This qn is taken from HFSJ book Pg:356

Consider that employee is a concrete class which implements abstract class Person


<jsp:useBean id="person" type="foo.employee">
<jsp:setProperty name="person" property ="name" value="Fred"/>
</jsp:useBean>


Imagine the servlet forwards the request to the above Jsp. Fig out what the Jsp would do for each version of the servlets.



what happens if the servlet code looks like

1) foo.Person p = new foo.Employee();
p.setName("Evan");
request.setAttribute("person",p);

ans: Fails at request time as the person attribute is stored at request scope while the jsp uses page scope.


2) foo.Employee p = new foo.Employee();
p.setName("Evan");
request.setAttribute("person",p);

works fine

But in servlet code 2) as wel the attrbute is stored at request scope.. I am not getting this point. Shouldnt a compiler error be thrown again. Please help

[Indunil Dasanayaka]

jacob I think u r right.

[georgy jacob]

But i dont think an error will be there in the book.. I guess we understood the concept a little differently.. By the way i meant that a error will occur during request(run time) and it will not be a compiler error

[Vishnu Prakash]

Check the Errata section here

Page: 416

[georgy jacob]

Thanks vishnu . The errata section u provided was really useful