Using XSLT in Mule
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XSLT (Extensible Stylesheet Language Transformations) is a language used to transform XML documents into other formats like other XML documents, HTML, text, etc. It can be used in Mule to transform an XML payload from one structure to another. For example, a Mule flow gets an XML payload, passes it through an XSLT transformer using an XSL stylesheet, which transforms the XML to a new structure and outputs the transformed XML payload.
Using XSLT in Mule
- 1. By Anirban Sen Chowdhary
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- 4. Here I will show you how ……
- 5. Before we start we must see what an XSLT actually is :- As per XSLT definition :- XSLT (Extensible Stylesheet Language Transformations) is a language for transforming XML documents into other XML documents, or other formats such as HTML for web pages, plain text or into XSL Formatting Objects, which may subsequently be converted to other formats, such as PDF PostScript and PNG. Source :- http://en.wikipedia.org/wiki/XSLT
- 6. So, XSLT can be use to transform one form of XML to another :- Here you can see the XSLT is transforming the XML payload into another XML
- 7. So, let us try this example in our Mule application Here we will be using XSLT for transforming the XML payload into another XML like below :-
- 8. So let’s consider we have a following flow in our Mule application:- As you can see we have used a Http inbound end point followed by a set payload component and then XSLT transformer. Here the set payload contain the XML that need to be transform
- 9. So set payload component contains the following payload :-
- 10. Our corresponding Mule flow will be as follows :- <flow name="xsltFlow1" doc:name="xsltFlow1"> <http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8081" path="test" doc:name="HTTP"/> <set-payload value="<RootElement><Name>Anirban</Name><Department> ATS</Department><Designation>SSE</Designation></RootEleme nt>" doc:name="Set Payload"/> <mulexml:xslt-transformer maxIdleTransformers="2" maxActiveTransformers="5" outputEncoding="UTF-8" doc:name="Transform from outer to inner" xsl-file="Transform.xslt" encoding="UTF-8" returnClass="java.lang.String" /> </flow> As you can see we are using XSLT file :- Transform.xslt
- 11. So, the file Transform.xslt should be in our src/main/resource folder
- 12. The file Transform.xslt Contains following code to transform :- <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output omit-xml-declaration="yes" indent="yes" /> <xsl:template match="/"> <NewRootElement> <NewName> <xsl:value-of select="RootElement/Name" /> </NewName> <NewDepartment> <xsl:value-of select="RootElement/Department" /> </NewDepartment> <NewDesignation> <xsl:value-of select="RootElement/Designation" /> </NewDesignation> </NewRootElement> </xsl:template> </xsl:stylesheet>
- 13. To test the application we hit the url http://localhost:8081/test in our browser and we get the following :- And you can see the XML payload has been transferred to this new XML
- 14. Hope you enjoyed the simple yet an amazing trick in Mule