Adding namespace and prefix to tags inside payload in wso2 ESB using XSLT

In this post I will share how to add namespace and prefix to tags inside payload in wso2 ESB using XSLT Mediator


We are getting following soap request

1. <soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope">  
2.    <soapenv:Body>  
3.     <catalog>       
4.        <product>    
5.           <number>100</number>    
6.           <name>BaseBall</name>    
7.           <colourChoices>Black</Currency>    
8.           <price>$50</DateTime>  
9.        </product> 
10.       </ExchangeRate 
11.     </catalog>  
12.    <soapenv:Body>  
13. <soapenv:Envelope>  

Then we want to add ex0 prefix to catalog tag and namespace must be http://sample.com/test//blog/Sample 


So we need to create sample.xslt style sheet like below

1.   <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0">  
2.     <xsl:output indent="yes"/>  
3.     <xsl:strip-space elements="*"/>  
4.     <!--match all the nodes and attributes-->  
5.     <xsl:template match="node()|@*">  
6.         <xsl:copy>  
7.             <xsl:apply-templates select="node()|@*">  
8.         </xsl:apply-templates></xsl:copy>  
9.     </xsl:template>  
10.     <!--Select the element need to be apply the namespace and prefix -->  
11.     <xsl:template match="catalog">  
12.         <!--Define the namespace with prefix ns0 -->  
13.         <xsl:element name="ex0:{name()}" namespace="http://sample.com/test/blog/Sample">  
14.             <!--apply to above selected node-->  
15.             <xsl:apply-templates select="node()|@*">  
16.         </xsl:apply-templates></xsl:element>  
17.     </xsl:template>  
18. </xsl:stylesheet>  

Then Go to Manage-> Service Bus-> Local Entries and add the created sample.xslt file.


Then in your proxy add xslt mediator as <xslt key="sample.xslt"/> and refer the sample.xslt. Add a log mediator after that to check the changed payload

1. <soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope">  
2.    <soapenv:Body>  
3.       <ex0:catalog xmlns:ex0="http://sample.com/test/blog/Sample">  
4.          <product>  
5.             <number>100</number>  
6.             <name>BaseBall</name>  
7.             <colourChoices>Black</colourChoices>  
8.             <price>50</price>  
9.          </product>  
10.       </ex0:catalog>  
11.    </soapenv:Body>  
12. </soapenv:Envelope>