Using a custom tag inside another tag's attribute value?

Hi all,
I have a custom tag, mytag:link, whose use currently looks like this:<mytag:link path="/images/logo.gif"/>Nevermind what the tag does. Here's its TLD:<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN" "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<taglib>
    <tlib-version>1.1.1</tlib-version>
    <jsp-version>1.2</jsp-version>
    <short-name>My custom tags TLD</short-name>
    <tag>
        <name>link</name>
        <tag-class>test.MyLinkTag</tag-class>
        <body-content>empty</body-content>
        <description>...</description>
        <attribute>
            <name>path</name>
            <required>true</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
    </tag>
</taglib>I want to replace the path argument of the mytag:link tag to the result of the evaluation of another tag (a SiteMesh decorator tag) like this:<mytag:link path="<decorator:getProperty property="meta.logo"/>"/>This, of course, doesn't work, as I get the following error:org.apache.jasper.JasperException: /decorator.jsp(34,92) equal symbol expected
     org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
     org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:405)
     org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:86)
     org.apache.jasper.compiler.Parser.parseAttribute(Parser.java:193)
     org.apache.jasper.compiler.Parser.parseAttributes(Parser.java:143)
     org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1328)
     org.apache.jasper.compiler.Parser.parseElements(Parser.java:1564)
     org.apache.jasper.compiler.Parser.parse(Parser.java:126)
     org.apache.jasper.compiler.ParserController.doParse(ParserController.java:211)
     org.apache.jasper.compiler.ParserController.parse(ParserController.java:100)
     org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:146)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     com.opensymphony.module.sitemesh.filter.PageFilter.applyDecorator(PageFilter.java:156)
     com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:59) If I replace the call to the other tag with
<mytag:link path="<%=someVariable%>"/>then it all works fine. This behavior seems correct, as the SiteMesh getProperty tag is writing its output to the Writer returned by pageContext.getOut() as it should. As such, this seems to be a design question, then. How are you supposed to do this?
Thanks in advance,
Matthew

Note that I've also posted a question to the SiteMesh user forums about this. It has more information about the motivation of this question.
See http://forums.opensymphony.com/thread.jspa?threadID=8561
I'm still looking for an answer, though.
--matthew

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     <FONT class="F10"> </FONT>
</TD>
               <TD CLASS="LeftEdge" STYLE="border-bottom:solid;border-bottom-width : thin;">
     <input TYPE="Button" NAME="DarkButton" VALUE="Dark" ONCLICK="SetBkg('Dark');">
</TD>
               <TD CLASS="LeftEdge" STYLE="border-bottom:solid;border-bottom-width : thin;">
     <input TYPE="Button" NAME="Light" VALUE="Light" ONCLICK="SetBkg('Light');">
</TD>
<input TYPE="Hidden" NAME="ccsfile" VALUE="<%=CURRENT_OBJECT.getColumn(3)%>">
<input TYPE="Hidden" NAME="dark_d" VALUE="<%=CURRENT_OBJECT.getColumn(6)%>">
<input TYPE="Hidden" NAME="dark_l" VALUE="<%=CURRENT_OBJECT.getColumn(7)%>">
<input TYPE="Hidden" NAME="DarkValue" VALUE="">
<input TYPE="Hidden" NAME="LightValue" VALUE="">
<input TYPE="Hidden" NAME="update" VALUE="1">
</TR>
</list:itemTemplate>
</FORM>

<list:footerTemplate>
</TABLE>
</list:footerTemplate>
</list:DataList>

I had the same problem. In your .tld change tagclass to tag-class and bodycontent to body-content and that should do the trick. The names slightly changed for JSP spec 1.2.

Using a custom tag inside another tag's attribute value?

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