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Name	Default Value	Description
`converter`	`null`	Option to override default XmlConverter. Will lookup for the converter in the Registry. The provided converted must be of type org.apache.camel.converter.jaxp.XmlConverter.
`transformerFactory`	`null`	Option to override default TransformerFactory. Will lookup for the transformerFactory in the Registry. The provided transformer factory must be of type javax.xml.transform.TransformerFactory.
`transformerFactoryClass`	`null`	Option to override default TransformerFactory. Will create a TransformerFactoryClass instance and set it to the converter.
`uriResolverFactory`	`DefaultXsltUriResolverFactory`	Camel 2.17: Reference to a `org.apache.camel.component.xslt.XsltUriResolverFactory` which creates an URI resolver per endpoint`.`The default implementation returns an instance of `org.apache.camel.component.xslt.DefaultXsltUriResolverFactory` which creates the default URI resolver `org.apache.camel.builder.xml`.XsltUriResolver per endpoint. The default URI resolver reads XSLT documents from the classpath and the file system. This option instead of the option `uriResolver` shall be used when the URI resolver depends on the resource URI of the root XSLT document specified in the endpoint; for example, if you want to extend the default URI resolver. This option is also available on the XSLT component, so that you can set the resource resolver factory only once for all endpoints.
`uriResolver`	`null`	Camel 2.3: Allows you to use a custom `javax.xml.transformation.URIResolver`. Camel will by default use its own implementation `org.apache.camel.builder.xml.XsltUriResolver` which is capable of loading from classpath.
`resultHandlerFactory`	`null`	Camel 2.3: Allows you to use a custom `org.apache.camel.builder.xml.ResultHandlerFactory` which is capable of using custom `org.apache.camel.builder.xml.ResultHandler` types.
`failOnNullBody`	`true`	Camel 2.3: Whether or not to throw an exception if the input body is null.
`deleteOutputFile`	`false`	Camel 2.6: If you have `output=file` then this option dictates whether or not the output file should be deleted when the Exchange is done processing. For example suppose the output file is a temporary file, then it can be a good idea to delete it after use.
`output`	`string`	Camel 2.3: Option to specify which output type to use. Possible values are: `string, bytes, DOM, file`. The first three options are all in memory based, where as `file` is streamed directly to a `java.io.File`. For `file` you must specify the filename in the IN header with the key `Exchange.XSLT_FILE_NAME` which is also `CamelXsltFileName`. Also any paths leading to the filename must be created beforehand, otherwise an exception is thrown at runtime.
`contentCache`	`true`	Camel 2.6: Cache for the resource content (the stylesheet file) when it is loaded. If set to `false` Camel will reload the stylesheet file on each message processing. This is good for development. Note: from Camel 2.9 a cached stylesheet can be forced to reload at runtime via JMX using the `clearCachedStylesheet` operation.
`allowStAX`		Camel 2.8.3/2.9: Whether to allow using StAX as the `javax.xml.transform.Source`. The option is default `false` in Camel 2.11.3/2.12.2 or older. And default `true` in Camel 2.11.4/2.12.3 onwards.
`transformerCacheSize`	`0`	Camel 2.9.3/2.10.1: The number of `javax.xml.transform.Transformer` object that are cached for reuse to avoid calls to `Template.newTransformer()`.
`saxon`	`false`	Camel 2.11: Whether to use Saxon as the `transformerFactoryClass`. If enabled then the class `net.sf.saxon.TransformerFactoryImpl`. You would need to add Saxon to the classpath.
`saxonExtensionFunctions`	`null`	Camel 2.17: Allows to configure one or more custom net.sf.saxon.lib.ExtensionFunctionDefinition. You would need to add Saxon to the classpath. By setting this option, saxon option will be turned out automatically.
`errorListener`		Camel 2.14: Allows to configure to use a custom `javax.xml.transform.ErrorListener`. Beware when doing this then the default error listener which captures any errors or fatal errors and store information on the Exchange as properties is not in use. So only use this option for special use-cases.
`entityResolver`		Camel 2.18: To use a custom org.xml.sax.EntityResolver with javax.xml.transform.sax.SAXSource.

Using XSLT endpoints

For example you could use something like

...

Which will load the staff_template.xsl resource from the file system, as the endpoint was configured with "file:" as prefix.
You can still though explicit configure a prefix, and then mix and match. And have both file and classpath loading. But that would be unusual, as most people either use file or classpath based resources.

Using Saxon extension functions

Since Saxon 9.2, writing extension functions has been supplemented by a new mechanism, referred to as integrated extension functions you can now easily use camel:

- Java example:

Code Block

language	java

SimpleRegistry registry = new SimpleRegistry();
registry.put("function1", new MyExtensionFunction1());
registry.put("function2", new MyExtensionFunction2());

CamelContext context = new DefaultCamelContext(registry);
context.addRoutes(new RouteBuilder() {
    @Override
    public void configure() throws Exception {
        from("direct:start")
            .to("xslt:org/apache/camel/component/xslt/extensions/extensions.xslt?saxonExtensionFunctions=#function1,#function2");
    }
});

Spring example:

Code Block

language	xml

<camelContext xmlns="http://camel.apache.org/schema/spring">
  <route>
    <from uri="direct:extensions"/>
    <to uri="xslt:org/apache/camel/component/xslt/extensions/extensions.xslt?saxonExtensionFunctions=#function1,#function2"/>
  </route>
</camelContext>


<bean id="function1" class="org.apache.camel.component.xslt.extensions.MyExtensionFunction1"/>
<bean id="function2" class="org.apache.camel.component.xslt.extensions.MyExtensionFunction2"/>

Dynamic stylesheets

To provide a dynamic stylesheet at runtime you can define a dynamic URI. See How to use a dynamic URI in to() for more information.

Available as of Camel 2.9 (removed in 2.11.4, 2.12.3 and 2.13.0)
Camel provides the CamelXsltResourceUri header which you can use to define a stylesheet to use instead of what is configured on the endpoint URI. This allows you to provide a dynamic stylesheet at runtime.

Accessing warnings, errors and fatalErrors from XSLT ErrorListener

Available as of Camel 2.14

From Camel 2.14 onwards, any warning/error or fatalError is stored on the current Exchange as a property with the keys Exchange.XSLT_ERROR, Exchange.XSLT_FATAL_ERROR, or Exchange.XSLT_WARNING which allows end users to get hold of any errors happening during transformation.

For example in the stylesheet below, we want to terminate if a staff has an empty dob field. And to include a custom error message using xsl:message.

Code Block

  <xsl:template match="/">
    <html>
      <body>
        <xsl:for-each select="staff/programmer">
          <p>Name: <xsl:value-of select="name"/><br />
            <xsl:if test="dob=''">
              <xsl:message terminate="yes">Error: DOB is an empty string!</xsl:message>
            </xsl:if>
          </p>
        </xsl:for-each>
      </body>
    </html>
  </xsl:template>

This information is not available on the Exchange stored as an Exception that contains the message in the getMessage() method on the exception. The exception is stored on the Exchange as a warning with the key Exchange.XSLT_WARNING.

Notes on using XSLT and Java Versions

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Key

Using XSLT endpoints

Using Saxon extension functions

Dynamic stylesheets

Accessing warnings, errors and fatalErrors from XSLT ErrorListener

Notes on using XSLT and Java Versions