CODEWITHSUNDEEP
javajspwebspherestruts
LostReality
LostReality

Reputation: 687

Embed/nest custom JSP tag to set the attribute value of another HTML tag

I am new to Java and struts and I am working on a project where I need to set the value of an attribute from a custom tag which retrieve the value of a Java property.

...
<cust:urlGeneration porlet="<cust:write property="tgtPortlet"/>">
  <a href="<% wsp.write(out) %>"/>the link</a>
<cust:urlGeneration/>
...

This property is set in a Java class depending on the context. This code is in my corresponding java class :

if(isMyFirstUseCase)
  screenbean.setTgtPortlet = "portlet.myFirstValue";
else
  screenbean.setTgtPortlet = "portlet.mySecondValue";

But it does not work, the portlet attribute is not set correctly (the tag string is not interpreted).

I want the porlet property to be set either with portlet.myFirstValue or portlet.mySecondValue but I do not manage to dynamically set it...

Do I need to escape something or is it simply not possible ? Otherwise anyone has suggestion or alternative solution ?

I can provide any additional information if needed.

Thanks

Upvotes: 1

Views: 1167

Answers (2)

LostReality
LostReality

Reputation: 687

If it can help anyone, I found a workaround using JSLT :

<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>

I set an intermediate variable with the value of my java class property using my "write" custom tag (Business requirement) :

<c:set var="varTgtValue"><cust:write property="tgtValue"/></c:set>

Then simply use this new variable to set my JSP tag's property using ${myVar} :

<cust:urlGeneration porlet="${varTgtValue}">
  <a href="<% wsp.write(out) %>"/>the link</a>
<cust:urlGeneration/>

Upvotes: 0

Dave Newton
Dave Newton

Reputation: 160191

You cannot nest tags this way; it would require recursive tag processing.

This is the same in XML–you can't use a tag as a property value for another tag.

Attributes should be set using normal JSP EL.

Upvotes: 1

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