The JSON transformer provides a basic mapping facility between POJOs and JSON (JSON marshalling and unmarshalling). Just like the JAXB Transformer, specification of the transformer requires a to and from specification with one Java type and one QNamed JSON type, depending on whether you're performing a Java to JSON or JSON to Java transformation.

The following configuration illustrates a JSON to Java transformation.

<trfm:transform.json
            from="{urn:switchyard-quickstart:transform-json:1.0}order"
            to="java:org.switchyard.quickstarts.transform.json.Order"/>

The following configuration illustrates a Java to JSON transformation of the same types as above.

<trfm:transform.json
            from="java:org.switchyard.quickstarts.transform.json.Order"
            to="{urn:switchyard-quickstart:transform-json:1.0}order"/>