Talend ESB Transformation Policy

To enable the Transformation via the Service Registry, upload the following Transformation policy to the Service Registry and attach it to a service:

<wsp:Policy Name="wspolicy_xslt" xmlns:wsp="http://www.w3.org/ns/ws-policy">
            <wsp:ExactlyOne>
            <wsp:All>
            <tpa:Transformation xmlns:tpa="http://types.talend.com/policy/assertion/1.0"
            path="etc/responseTransformation.xsl"
            appliesTo="provider"
            message="response"
            type="xslt"/>
            </wsp:All>
            </wsp:ExactlyOne>
            </wsp:Policy>

• The type parameter only supports the xslt value. The "xslt" activates the XSLT transformation using a xslt script. For more information about the XSLT feature of Apache CXF, see http://cxf.apache.org/docs/xslt-feature.html.

• The appliesTo parameter supports following values: consumer/provider/always/none.

• The message parameter currently supports following values: request/response/all/none.

The path attribute can also be specified through the context properties:

"org.talend.esb.transformation.xslt-path"

If the context properties are specified, they overwrite the corresponding policy attributes.

The path attribute can contain:

• HTTP URL's (for example: http://example.org/xsl/requestTransformation.xsl),

• Path to an XSL file, relative to the Talend Runtime Container(for example: etc/requestTransformation.xsl ) or an absolute path,

• Classpath path to the XSL file.

When running a participant in servlet-container or as a standalone application, the following dependency should be used in the participant's pom.xml file:

pom.xml for servlet-based or standalone participants

<dependency>
            <groupId>org.talend.esb.policies</groupId>
            <artifactId>transformation-policy</artifactId>
            <version>${project.version}</version>
            </dependency>

When running a participant in the Talend Runtime Container, in the Require-Bundle section of Felix bundle plugin, the transformation-policy bundle should be mentioned:

OSGi environment pom.xml

<plugin>
            <groupId>org.apache.felix</groupId>
            <artifactId>maven-bundle-plugin</artifactId>
            <configuration>
            <instructions>
            <Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>
            <Require-Bundle>
            ...
            transformation-policy
            </Require-Bundle>
            </instructions>
            </configuration>
            <extensions>true</extensions>
            </plugin>

Here is an example of XSLT identity transformation that transforms a document to itself (which means, no transformation is performed):

<?xml version="1.0" encoding="utf-8"?>
            <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
            
            <xsl:template match="node()|@*">
            <xsl:copy>
            <xsl:apply-templates select="node()|@*"/>
            </xsl:copy>
            </xsl:template>
            </xsl:stylesheet>

Here is an example of template which changes a message value to another value:

<?xml version="1.0" encoding="utf-8"?>
            <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
            
            <xsl:template match="node()|@*">
            <xsl:copy>
            <xsl:apply-templates select="node()|@*"/>
            </xsl:copy>
            </xsl:template>
            
            <xsl:template match="LastName/text()[.='Icebear']">Panda</xsl:template> 
            
            </xsl:stylesheet>