How to use JSTL XSLT tags with "result" attribute

[matsuhashi]

Hi, I am wondering how to use JSTL XML <x:transform> tag with "result"
attribute.

I am using the jakarta-taglibs/standard-1.0.2 with Tomcat 4.1.3 on
Windows2000.

I have a String variable "${pipeline_final_output_String}" within the
request scope in which a XML document is contained.

I needed to transform the String via a simple identityTransform because the
original XML is in a canonical-form; therefore no \n and no line
indentation is used. I want to perform <xsl:output indent="yes"/> on the
original.

Also I want to print the variable's content while escaping "<" and "&"
characters into "&lt;" and "&amp;" respectively;

All these are meant to provide a debug-view to see "XML as it is" in the
resulting HTML.

I coded a JSP as follows :
----------------------------------------------------------------------------------
<%@ taglib uri="/WEB-INF/x.tld" prefix="x" %>

    <h3>raw Model</h3>
    <c:import var="xslturl2" url="/WEB-INF/transform/IdentityTransform.xsl"
     charEncoding="Shift_JIS"/>
    <%@ page import="javax.xml.transform.stream.StreamResult" %>
    <%@ page import="javax.xml.transform.Result" %>
     <%@ page import="java.io.StringWriter" %>
    <%
     StringWriter sw = new StringWriter();
    StreamResult outputResult = new StreamResult(sw);
    %>
    <x:transform xml="${pipeline_final_output_String}" xslt="${xslturl2}"
     result="outputResult"/>
    <%
    String escapedString = escape(sw.toString());
    %>
    <table>
    <tr><td><pre><%= escapedString %></pre></td></tr>
    </table>
<%!
String escape(String s) {
    StringBuffer buffer = new StringBuffer(1024);
    if (s != null) {
        for (int i = 0; i < s.length(); i++) {
            String c = s.substring(i,i+1);
            if (c.equals("<")) {
                buffer.append("&lt;");
            } else if (c.equals(">")) {
                buffer.append("&gt;");
            } else if (c.equals("&")) {
                buffer.append("&amp;");
            } else {
                buffer.append(c);
            }
        }
        return buffer.toString();
    } else {
        return null;
    }
}
------------------------------------------------------------

When executed, a ServletException occured. The diagnostics says something
as follows (in Japanse) :

"An error occured during evaluating the custome action attribute "result"
with the value "outputResult".
When tried to convert a String "outputResutl" into the type of
"javax.xml.transform.Result",
there is not a PropertyEditor to the type."

I could not find a instructive articles on Web how to use "result"
attribute of <x:transform>.

Anyone knows how?




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