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Chapter 82. XSLT

Transforms XML payload using an XSLT template.

82.1. What’s inside
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Please refer to the above link for usage and configuration details.

82.2. Maven coordinates
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Create a new project with this extension on code.quarkus.redhat.com

Or add the coordinates to your existing project: 

<dependency>
    <groupId>org.apache.camel.quarkus</groupId>
    <artifactId>camel-quarkus-xslt</artifactId>
</dependency>
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82.3. Additional Camel Quarkus configuration
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To optimize XSLT processing, the extension needs to know the locations of the XSLT templates at build time. The XSLT source URIs have to be passed via the quarkus.camel.xslt.sources property. Multiple URIs can be separated by comma. 

quarkus.camel.xslt.sources = transform.xsl, classpath:path/to/my/file.xsl
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Scheme-less URIs are interpreted as classpath: URIs.

Only classpath: URIs are supported on Quarkus native mode. file:, http: and other kinds of URIs can be used on JVM mode only.

<xsl:include> and <xsl:messaging> XSLT elements are also supported in JVM mode only right now.

If aggregate DSL is used, XsltSaxonAggregationStrategy has to be used such as 

from("file:src/test/resources?noop=true&sortBy=file:name&antInclude=*.xml")
   .routeId("aggregate").noAutoStartup()
   .aggregate(new XsltSaxonAggregationStrategy("xslt/aggregate.xsl"))
   .constant(true)
   .completionFromBatchConsumer()
   .log("after aggregate body: ${body}")
   .to("mock:transformed");
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Also, it’s only supported on JVM mode.

82.3.1. Configuration
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TransformerFactory features can be configured using following property: 

quarkus.camel.xslt.features."http\://javax.xml.XMLConstants/feature/secure-processing"=false
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82.3.2. Extension functions support
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Xalan’s extension functions do work properly only when:

  1. Secure-processing is disabled
  2. Functions are defined in a separate jar
  3. Functions are augmented during native build phase. For example, they can be registered for reflection: 
@RegisterForReflection(targets = { my.Functions.class })
public class FunctionsConfiguration {
}
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Note

The content of the XSLT source URIs is parsed and compiled into Java classes at build time. These Java classes are the only source of XSLT information at runtime. The XSLT source files may not be included in the application archive at all.

Expand
Configuration propertyTypeDefault

lock quarkus.camel.xslt.sources

A comma separated list of templates to compile.

string

 

lock quarkus.camel.xslt.package-name

The package name for the generated classes.

string

org.apache.camel.quarkus.component.xslt.generated

lock quarkus.camel.xslt.features

TransformerFactory features.

Map<String,Boolean>

 

lock Configuration property fixed at build time. All other configuration properties are overridable at runtime.

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