How to access variables passed in custom tag body

Question

I am developing custom tags in my application. I need to pass some variables from the .jsp file into tag file. I want these to be passed as body of the tag rather than as tag parameter. It seems the correct syntax for this is:
<myTags:display> someVariable </myTags:display>
Question 1: Can I not use this as: <myTags:display someVariable /> Since this tag will be used at many places in the jsp, I dont want to write myTags:display twice for every usage.
Question 2:
I want to call the tags from main.jsp like:
<% String var1 = "Display Me Please"; %>
<myTags:display var1 />I want the tag file to do some processing on the value stored in var1. I've written the following code in tag file, display.tag:
<jsp:doBody var="theBody" />
<% Object obj = (Object) request.getAttribute ("theBody"); %>This code snippet gives me access to obj which has the value "var1". Now how do I access the value that is contained in "var1".
Edited by: coolkomal on Jun 3, 2009 7:45 AM

Answer 1

coolkomal wrote:
I am developing custom tags in my application. I need to pass some variables from the .jsp file into tag file. I want these to be passed as body of the tag rather than as tag parameter. It seems the correct syntax for this is:
<myTags:display> someVariable </myTags:display>
Question 1: Can I not use this as: <myTags:display someVariable /> Since this tag will be used at many places in the jsp, I dont want to write myTags:display twice for every usage.
<myTags:display var="<%=someVariable>"/> is a valid syntax for performing respective action of that variable. You can also use EL to pass the variable ${someVariable} provided the custom tag provide support for EL.
>
Question 2:
I want to call the tags from main.jsp like:
<% String var1 = "Display Me Please"; %>
<myTags:display var1 />
Just ensure that you declare all the related variables in Main.jsp and statically include Main.jsp in your jsp such that you do the checking
[http://java.sun.com/products/jsp/tags/11/syntaxref117.html]
>
I want the tag file to do some processing on the value stored in var1. I've written the following code in tag file, display.tag:
<jsp:doBody var="theBody" />
<% Object obj = (Object) request.getAttribute ("theBody"); %>This code snippet gives me access to obj which has the value "var1". Now how do I access the value that is contained in "var1".Can be done provided you code it the right way. Start learning basics of how to create custom taglibraries to gain more knowledge on how things can be managed.
[http://java.sun.com/javaee/5/docs/tutorial/doc/bnalj.html]