Thread: How to get the JSP line postition in Tag class?

Hi,

is it possible to determine the exact line-position in JSP files inside a Tag (or TagSupport Class)?
We need this to generate a unique, but don't variable ID, it must the same by every request. (Depending on the actual position in the JSP)

We've thought about the possibility to generate a ID over the StackTrace, but we aren't shure if this is a save method, cause every Webcontainer may translate the JSPs in a different way.
(It must work on every web- or j2ee-container)
IDs on different containers may be different, but in the same instance they must be exactly the same. (For every position, of course)

Thanks for every suggestions.

Not entirely sure what you mean here, the line position of what exactly and when?

// Json

I like to get the line position from the actual JSP.
For example:

test.jsp
...

[...]
    <tr>
 
        <td class="FormAreaHorizontalPadder"></td>
 
        <td>
 
          <c:if test="${empty activeForm.testMessages}">
 
            &lt;no messages&gt;
 
          </c:if>
 
          <c:forEach var="message" items="${activeForm.testMessagesConsumed}">
 
            <c:out value="${message}" /><br />
 
          </c:forEach>
 
        </td>
 
      </tr>
[...]

When the IfTag is called on "<c:if test="${empty activeForm.testMessages}">" i need in the tag class a information like "test:jsp 102" where 102 is the actual line in the jsp.
Particular i will use this at rendering time in the doStartTag() and doEndTag() Method in the Tag class.

Thanks