Doubt in EL Implicit Objects: Cookie

[sakthikumaran navakumar]

Hi all,

In HFSJ Page No : 388 they have dealt about the implicit EL object cookie


<%Cookie cookies = request.getKookies();

for(int i = 0; i<=cookies.length; i++){
if((cookies[i].getName()).equals("userName")){
out.println(request.getValue());
}
}%<

EL representation given in Book : ${cookie.userName.valu}

Whether thevalu is the sytem in built keyword?

Can you please tell me whether the equaivalent [] representation for the above is given JSP code scriptlet is $cookie["userName"]["valu"]}

If am wrong please tell me the equivalent.

Thanks and Regards,

Sakthi.

[James Mark]

I think it is value

[Atul Sawant]

Please go and check API of cookie in javax.servlet.http package

http://java.sun.com/j2ee/1.4/docs/api/index.html

the class Cookie has some important methods...

getName
getValue
setMaxAge
getPath

etc...


considering the example given above..

when you say ${cookie.username.value} it means

cookies[i].getUsername.getValue

Please read standards of how Bean class should be coded and how exactly they are read.

[Jayant Raj]

It is 'value' & the same has been confirmed in HFSJ errata page.

[Michael Ku]

I just passed the SCWCD exam and used HFJS. It had a lot of errors.

If you are relying on the HFSJ book, then you should first get the errata from the website and manually make the corrections to the text. If you do not, you could wind up missing some questions that you otherwise would get right. This is what I did and it helped a lot

[Ken Truitt]

if the proper way to access a cookie's value in el is
${cookie.username.value}
then this assumes that the cookie object works like a bean,
with the naming conventions and all. That is, the cookie
object referenced by ${cookie.username} from the cookie map
which is the implicit object. I don't know that this was ever
said directly in hf.... Why would one assume this is so?

Ken

[Ken Truitt]

Also, if it is true that anything you can do with the dot-operator you can do with the collection operator, is the equivalent of
${cookie.username.value}
as expressed with the '[]' operator,
${cookie[username][value]}?

Ken Truitt

[Marc Peabody]

if the proper way to access a cookie's value in el is
${cookie.username.value}
then this assumes that the cookie object works like a bean,
with the naming conventions and all. That is, the cookie
object referenced by ${cookie.username} from the cookie map
which is the implicit object. I don't know that this was ever
said directly in hf.... Why would one assume this is so?

ANY object with a proper get method can have that get method accessed like a bean in EL. Since Cookie has a getValue method, it can be called in EL with .value tacked on.

Also, if it is true that anything you can do with the dot-operator you can do with the collection operator, is the equivalent of
${cookie.username.value}
as expressed with the '[]' operator,
${cookie[username][value]}?

Almost. You forgot to add quotes inside the []s.
${cookie["username"]["value"]