Question

I’m currently using Spring Source Tools 2.9.1 – but I had the same issue with standard Eclipse J2EE distribution.

I’m writing java web application with jsp views.

To better reuse code I have created some tags – *.tag files in WEB-INF\tags folder

Example of enum.tag file:

<jsp:root version="2.0" 
    xmlns:form="http://www.springframework.org/tags/form" 
    xmlns:jsp="http://java.sun.com/JSP/Page"
    xmlns:spring="http://www.springframework.org/tags"
    xmlns:tags="urn:jsptagdir:/WEB-INF/tags"
    xmlns:fmt="http://java.sun.com/jsp/jstl/fmt"
    xmlns:c="http://java.sun.com/jsp/jstl/core">

    <jsp:directive.tag pageEncoding="UTF-8" />

    <jsp:directive.attribute name="value" required="true" rtexprvalue="true" type="Object" />
    <jsp:directive.attribute name="cssClass" required="false" rtexprvalue="true" />

    <span class="enum ${value.cssClass} ${cssClass}"> 
        <span class="message"> 
            <spring:message code="${value.name}" />
        </span>
    </span>

</jsp:root>

If I use this tag in my jsp the tag is reckognized by validator, but the tag attributes are not.

so I get warning for this line of jsp

<tags:enum value="${t.state}" />

warning:

Undefined attribute name "value"

tag nemaspace is initialized with:

xmlns:tags="urn:jsptagdir:/WEB-INF/tags

How to setup eclipse to properly validate tagdir’s tags?

Answer 1

I use XML version of jsps (and tags) – all teh fiels are valid XML documents, it uses syntax like

<jsp:directive.tag pageEncoding="UTF-8" body-content="scriptless" />

<jsp:directive.attribute name="caption" required="false" rtexprvalue="true" />
<jsp:directive.attribute name="labelInfix" required="false" rtexprvalue="true" />

I now realized and checked that I need to use tagx extension (alongside jspx). With this change Eclispe validation works well.