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about the exam objective

 
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Hi All,
The exam objective 12.8 says..
Identify methods that return an outer tag handler from within an inner tag handler ..what are thses mathods??
also what is the return value of PageContext.getOut()?
what are the methods in the custome tag handler that accesses..
1. a given JSP page's implicit variable
2. The Jsp page's attributes??
thanks in advance..
Trupti
 
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trupti nigam
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What is wrong with my questions??
thanks,
Trupti
 
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Dear Nigam ,
I think the answers are :
1.Identify methods that return an outer tag handler from within an inner tag handler
--TagSupport.findAncestorWithClass(Tag,class)
-- getParent()
2.the return value of PageContext.getOut()--JspWriter
what are the methods in the custome tag handler that accesses..
1. a given JSP page's implicit variable-- setPageContext(PageContext pc)
I couldn't understand what do u mean by Jsp page attribute .If that is about other implicit variables then u can use the methods of class PageContext and access them from Tag Handler class.U already have pageContext implicit variable
from setPageContext method.
But if u mean Custom Tag's attributes then we have other classes like TagExtraInfo and 2-3 others which can help u know more about Tag attributes.
Regards,
Ajay Rana
SCJP,SCWCD
 
trupti nigam
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thanks AJAY..
Trupti
 
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There are several utility methods availabe in PageContext to get a jsp page's implicit vars like 'request' / 'response' /'session' etc.
Some examples ,
pageContext.getRequest();
pageContext.getResponse();
pageContext.getSession();
Regardng your other question, how to retrive page's attribures, there is again a util method for this.
pageContext.getAttribute("name",PageContext.PAGE_SCOPE);
regards,
Maha Anna
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