Jersey ModelValidationException - No Injection source found

Question

I got a weird problem, that I absolutely doesn't understand, with Jersey 2.6.

I can't explain why, but one of the query parameter make jersey throw a ModelValidationException

    @ApiOperation("Save")
    @PUT
    public Response save(
            @HeaderParam("token") final String token,
            @QueryParam("someValue") final SomeValueDTO someValue,
            @QueryParam("anotherParam") final int anotherParam) throws TechnicalException {

        return Response.ok().build();
    }

the queryParam 'someValue' make jersey throw:

org.glassfish.jersey.server.model.ModelValidationException: Validation of the application resource model has failed during application initialization.|[[FATAL] No injection source found for a parameter of type public javax.ws.rs.core.Response ch.rodano.studies.api.resources.PagesResource.save(java.lang.String,ch.rodano.studies.api.dto.JSONValueDTO,int) throws ch.rodano.studies.exceptions.RightException,ch.rodano.studies.configuration.exceptions.NoNodeException at index 1.; source='ResourceMethod{httpMethod=PUT, consumedTypes=[], producedTypes=[application/json], suspended=false, suspendTimeout=0, suspendTimeoutUnit=MILLISECONDS, invocable=Invocable{handler=ClassBasedMethodHandler{handlerClass=class ch.rodano.studies.api.resources.PagesResource, handlerConstructors=[org.glassfish.jersey.server.model.HandlerConstructor@41ed3918]}, definitionMethod=public javax.ws.rs.core.Response ch.rodano.studies.api.resources.PagesResource.save(java.lang.String,ch.rodano.studies.api.dto.JSONValueDTO,int) throws ch.rodano.studies.exceptions.RightException,ch.rodano.studies.configuration.exceptions.NoNodeException, parameters=[Parameter [type=class java.lang.String, source=token, defaultValue=null], Parameter [type=class ch.rodano.studies.api.dto.JSONValueDTO, source=valuesASD, defaultValue=null], Parameter [type=int, source=visitPk, defaultValue=null]], responseType=class javax.ws.rs.core.Response}, nameBindings=[]}']

If I use String instead of SomeValueDTO everything's okay. SomeValueDTO is a quite classic POJO with an empty constructor and getters/setters.

If someone has an idiea !!

Answer 1

SomeValueDTO needs to be convertible. Options to accomplish this:

1. A public static SomeValueDTO valueOf(String param) that returns the type (SomeValueDTO)
2. A public static SomeValueDTO fromString(String param) that returns the type (SomeValueDTO)
3. Or a public constructor that accepts a String
4. Implement a ParamConverter. You can see an example here

In either of the first three cases, you'll want to construct the instance accordingly by parsing the String either in the constructor or in one of the above-mentioned methods.

Generally, you'll only want to use the ParamConverter for third-party classes that you cannot edit. Otherwise use the other three options for your own classes.