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storing objects in pageContext

varun prakash
Greenhorn

Joined: Oct 12, 2006
Posts: 17
As per my understanding calling pageContext.setAttribute(key,object) stores the object in page scope.My question is whether it is stored inside pageContext.Means like implicit Object, requestScope and applicationScope,pageContext is also a map.(or)pageContext is just a way to store the objects inside any of the scopes.

Are Objects with page scope stored in the PageContext(implicit object)???


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Kaveriappa Poonacha
Greenhorn

Joined: Feb 15, 2006
Posts: 10
Hi Varun,
the inheritance tree for PageContext:
java.lang.Object
extended by javax.servlet.jsp.JspContext
extended by javax.servlet.jsp.PageContext
Please refer the excellent JSP API Javadocs.
Hope this answers your question.
Ben Souther
Sheriff

Joined: Dec 11, 2004
Posts: 13410

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varun prakash
Greenhorn

Joined: Oct 12, 2006
Posts: 17
Thanks for your reply.
I want to reframe my question a little bit.

Attributes stored in request scope are stored in Implicit object requestScope(map).Similarly where pageScope attributes are stored?

Since PageContext is not an object,page Scope attributes cannot be stored in pageContext.Am i correct?
William Brogden
Author and all-around good cowpoke
Rancher

Joined: Mar 22, 2000
Posts: 12806
    
    5
Since PageContext is not an object,page Scope attributes cannot be stored in pageContext.Am i correct?


I suggest that you read the javadocs for javax.servlet.jsp.PageContext - an abstract Class.

There is a nice discussion of all of the facilities that a PageContext supplies.
Bill
Stefan Evans
Bartender

Joined: Jul 06, 2005
Posts: 1018
The request object stores its attributes in some way.
The pageContext object stores its attributes in some way.

How these objects store their attributes is irrelevant to you.
They could be stored in a map (and probably are) but they don't have to be.
The implicit objects revealed to EL as Maps: pageScope, requestScope, sessionScope etc etc are seperate.

So you have two implicit variables.
pageContext - for accessing the pageContext object
pageScope - for accessing the attributes stored in the pageContext. It gets them by calling pageContext.getAttribute()

Does that clear things up?
varun prakash
Greenhorn

Joined: Oct 12, 2006
Posts: 17
Thanks to all for the reply
 
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