Htykuut

I use Camel 2.16.0 for a Camel Rest project. I have introduced an abstract type that I need a custom deserializer to handle. This works as expected in my deserialization unit tests where I register my custom deserializer to the Objectmapper for the tests. To my understanding it is possible to register custom modules to the Jackson Objectmapper used by Camel as well (camel json).

My configuration:

...

<camelContext id="formsContext" xmlns="http://camel.apache.org/schema/spring">

  ...

  <dataFormats>

    <json id="json" library="Jackson" useList="true" unmarshalTypeName="myPackage.model.CustomDeserialized" moduleClassNames="myPackage.MyModule" />      

  </dataFormats>

</camelContext>

My module:

package myPackage;



import com.fasterxml.jackson.databind.module.SimpleModule;



public class MyModule extends SimpleModule {



  public MyModule() {

    super();

    addDeserializer(CustomDeserialized.class, new MyDeserializer());

  }



}

The Camel rest configuration:

restConfiguration()

.component("servlet")

.bindingMode(RestBindingMode.json)

.dataFormatProperty("prettyPrint", "true")

.contextPath("/")

.port(8080)

.jsonDataFormat("json");

When running the service and invoking a function that utilize the objectmapper I get the exception:

com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of myPackage.model.CustomDeserialized, problem: abstract types either need to be mapped to concrete types, have custom deserializer, or be instantiated with additional type information

Any suggestions on what is wrong with my setup?

I found this solution to the problem and used this implementation for my custom jackson dataformat:

public class JacksonDataFormatExtension extends JacksonDataFormat {



  public JacksonDataFormatExtension() {

    super(CustomDeserialized.class);

  }



  protected void doStart() throws Exception {

    addModule(new MyModule());

    super.doStart();

  }

}