How to evalute the name of an attribute at runtime?

Question

hi, I have a custom tag that accepts dynamic attributes. I would like to pass attributes names that are defined at run time, by EL, but didn't find a way to do it
this is what I tried without success
${name1} <!-- "email" -->
${name2} <!-- "username" -->
<mytags:customtag>
   <jsp:attribute name="${name1}"> some jsp here </jsp:attribute>
   <jsp:attribute name="${name2}"> some jsp here </jsp:attribute>
</mytags:customtag>it seems that jsp:attribute name attribute is rtexprvalue="false", so it doesn't evaluate name1 to "email".
Is there a way to do what I'm trying here?
Edited by: DMD_ANFINI on Apr 12, 2010 2:23 PM

Answer 1

You can use dynamic attributes for custom tags created with tag file. Please see the sample code given below;
<%@ tag body-content=’empty’ dynamic-attributes=’tagAttrs’%>
<%@ attribute name=’optionsList’ type=’java.util.List’ required=’true’ rtexprvalue=’true’ %>
<%@ attribute name=’name’ required=’true’ %>
<%@ taglib uri=”http://java.sun.com/jsp/jstl/core” prefi x=”c” %>
<select name=’${name}’
<c:forEach var=”attrEntry” items=”${tagAttrs}”>
    ${attrEntry.key}=’${attrEntry.value}’
</c:forEach>
>
<c:forEach var=”option” items=”${optionsList}”>
    <option value=’${option}’> ${option} </option>
</c:forEach>
</select>A * R