How to loop through a HashMap in XSL?

sunilnk · December 9th, 2003, 01:08 AM

Hi All,
I need to pass a set of dynamic filter conditions to XSL file from Java program. Hence, I created a HashMap of filter conditions and passed them from Java program to XSL file. How do I loop through that HashMap in XSL to retrieve the key-value pairs?
Thanks and Regards,
Sunil.

armmarti · December 9th, 2003, 01:46 AM

Quote:

quote:Originally posted by sunilnk
Hi All,
I need to pass a set of dynamic filter conditions to XSL file from Java program. Hence, I created a HashMap of filter conditions and passed them from Java program to XSL file. How do I loop through that HashMap in XSL to retrieve the key-value pairs?
Thanks and Regards,
Sunil.

What you can pass to XSLT stylesheet are so called stylesheet parameters. For example, in the command line you can write:

Code:

saxon source.xml sheet.xsl param1=value1 param2=value2 ...

However, it's impossible to dynamically change XPath expressions (as I understand, you want to dynamically create predicates) in stylesheets. Post your stylesheet source and say what you want to do exactly, and we'll try to find a solution.

Regards,
Armen

sunilnk · December 9th, 2003, 02:23 AM

Here are the details:
My main requirement is to pass a set of filter parameters to the XSL dynamically. I am using the XALAN processor.
I am trying to pass the HashMap of filters from Java program as follows:

            TransformerFactory factory = TransformerFactory.newInstance();
            Transformer transformer = factory.newTransformer(new StreamSource("coltest.xsl"));

            HashMap paramMap = new HashMap();
            paramMap.put("country", "EU");
            paramMap.put("title", "Mac");
            transformer.setParameter("parameters", paramMap);
            transformer.transform(new StreamSource("catalog.xml"),new StreamResult(System.out));

The XSL file is as follows:

<?xml version="1.0" encoding="ISO-8859-1"?>

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xalan="http://xml.apache.org/xalan"
    xmlns:java="http://xml.apache.org/xslt/java" exclude-result-prefixes="java">

<xsl:output method="html" />
<xsl:param name="parameters" select="java:java.util.HashMap.new" />

<xsl:template match="/">
    <html>
        <body>
            <table border="2" bgcolor="yellow">
                <tr>
                    <th>Title</th>
                    <th>Artist</th>
                <xsl:apply-templates select="catalog/cd">
                    <xsl:with-param name="parameters" select="$parameters" />
                </xsl:apply-templates>
                </tr>
            </table>
        </body>
    </html>
</xsl:template>

<xsl:template match="cd">

<xsl:variable name="keys" select="java:keySet($parameters)" />

<xsl:for-each select="$keys">

</xsl:for-each>

</xsl:template>
</xsl:stylesheet>

Let me know if this feasible using XSL.
If not, what is a viable solution to pass filter conditions dynamically - both tag name and value for that being dynamic.

Thanks and Regards,
Sunil.

armmarti · December 10th, 2003, 01:11 PM

Sorry for the late response: I was busy...

So, Xalan (2.5.2, for example) gives you an opportunity to write your own extensions.
Read first this: http://xml.apache.org/xalan-j/extensions.html.
You can manipulate the HashTable like this: http://xml.apache.org/xalan-j/extensions.html#ex-java .
This example will help you to accomplish your work. The drawback of your stylesheet is that it depends on the concrete XSLT processor.

Regards,
Armen

sunilnk · December 15th, 2003, 05:28 AM

Great... it worked! Thanks for the help.

Regards,
Sunil.

swarna$ · April 10th, 2017, 12:54 AM

i tried reading setting hashmap at jav end and use that map in my XSLT and generate dynamic values. But it didnot work using saxon.

mhkay · April 10th, 2017, 04:09 AM

swarna$, please don't add a completely new question to a thread that closed over 13 years ago. Ask a new question. And please say exactly what you were doing and exactly how it failed.

Also, unless your question is specifically about something you read in a Wrox book, the best place to get answers to XSLT coding questions these days is StackOverflow.