EL vs. JSP implicit objects

[Srinu Nanduri]

I assume that the JSP implicit objects cannot be accessed in EL and that is why we have dedicated EL implicit objects.

However, the following question from javabeat

18) Assume that a property by name 'eId' is defined in the EmployeeId object,
which inturn is contained in Employee class by the name 'empId'.
<% EmployeeId id = new EmployeeId(1000); %>
<% Employee employee = new Employee(id); %>
<% request.setAttribute("johny", employee); %>
which of the following uses the correct EL for accessing the eId property?
a. ${requestScope.johny.empId.eId}
b. ${requestScope.johny.eId.empId}
c. ${request.johny.empId.eId}
d. ${requestScope[johny"[empId[eId]]]}
e. All the above.

has the answer

18) a, c and e.
Options a, c and e are correct.

How are these correct?

[Christophe Verré]

<% request.setAttribute("johny", employee); %>

Everything put into the request will be available via EL's requestScope implicit object. Even if you set an attribute from a scriptlet into the request, you can read it back from EL. The requestScope is a Map containing all request scoped attributes.

[Srinu Nanduri]

My question is "How is C correct?"

[Christophe Verré]

It's not correct

[Srinu Nanduri]

Thanks!

[sudhakar karnati]

Hi Srinu,

Could you please give me what is the answer for this question?

Thanks & Regards,
Sudhakar Karnati
[ June 20, 2008: Message edited by: sudhakar karnati ]

[Srinu Nanduri]

The answer is only "A".

[Amol Fuke]

Hi Srinu ,

Just to confirm ,

Is empId the object of EmployeeId ?

Thanks,
Amol

[Jan Sterk]

Amol,

Johnny is an Employee object. Employee has a property empId, which returns an EmployeeId object. EmployeeId has a property eId.

[Amol Fuke]

Got it..

Thanks,
Amol