Red Hat Summit Red Hat SummitSupportConsoleDevelopersStart a trialContact

Chapter 44. JSLT

Query or transform JSON payloads using an JSLT.

44.1. What’s inside
Copy link

Please refer to the above link for usage and configuration details.

44.2. Maven coordinates
Copy link

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-jslt</artifactId>
</dependency>
Copy to Clipboard Toggle word wrap

44.3. allowContextMapAll option in native mode
Copy link

The allowContextMapAll option is not supported in native mode as it requires reflective access to security sensitive camel core classes such as CamelContext & Exchange. This is considered a security risk and thus access to the feature is not provided by default.

44.4. Additional Camel Quarkus configuration
Copy link

This component typically loads the templates from classpath. To make it work also in native mode, you need to explicitly embed the templates files in the native executable by using the quarkus.native.resources.includes property.

For instance, the route below would load the JSLT schema from a classpath resource named transformation.json: 

from("direct:start").to("jslt:transformation.json");
Copy to Clipboard Toggle word wrap

To include this (an possibly other templates stored in .json files) in the native image, you would have to add something like the following to your application.properties file: 

quarkus.native.resources.includes = *.json
Copy to Clipboard Toggle word wrap

44.4.2. Using JSLT functions in native mode
Copy link

When using JSLT functions from camel-quarkus in native mode, the classes hosting the functions would need to be registered for reflection. When registering the target function is not possible, one may end up writing a stub as below. 

@RegisterForReflection
public class MathFunctionStub {
    public static double pow(double a, double b) {
        return java.lang.Math.pow(a, b);
    }
}
Copy to Clipboard Toggle word wrap

The target function Math.pow(…​) is now accessible through the MathFunctionStub class that could be registered in the component as below: 

@Named
JsltComponent jsltWithFunction() throws ClassNotFoundException {
    JsltComponent component = new JsltComponent();
    component.setFunctions(singleton(wrapStaticMethod("power", "org.apache.cq.example.MathFunctionStub", "pow")));
    return component;
}
Copy to Clipboard Toggle word wrap
Back to top
Red Hat logoGithubredditYoutubeTwitter

Learn

Try, buy, & sell

Communities

About Red Hat Documentation

We help Red Hat users innovate and achieve their goals with our products and services with content they can trust. Explore our recent updates.

Making open source more inclusive

Red Hat is committed to replacing problematic language in our code, documentation, and web properties. For more details, see the Red Hat Blog.

About Red Hat

We deliver hardened solutions that make it easier for enterprises to work across platforms and environments, from the core datacenter to the network edge.

Theme

© 2025 Red Hat