Looks like jackson's annotations are ignored

[jjant]

From @botbfr, aws/aws-sdk-java#2453.

Describe the issue

I have overriden RequestHandler<I, O> with my lambda. All the jackson's annotations in my pojo (PreSignUpEvent) are ignored (Tested with JsonProperty so far). => The attributes that does not require an annotation are correctly deserialized (Because the attribute's name is the same than the object attribute's name) but not the ones with 2 different names (that's why I need to use JsonProperty annotation)

I'm using jackson v2 annotations.

I tried with RequestStreamHandler, calling in my lambda 'new ObjectMapper().readValue(InputStream, MyPojo.class)' and it worked. The annotations are taken into account.

My pojo and the lambda (just for the example here, I tried with the field 'version' -> versionn):

public class PreSignUpEvent {

    @JsonProperty("version")
    private int versionn;

    private String region;


    public PreSignUpEvent() {
    }

    public int getVersionn() {
        return versionn;
    }

    public void setVersionn(int versionn) {
        this.versionn = versionn;
    }

    public String getRegion() {
        return region;
    }

    public void setRegion(String region) {
        this.region = region;
    }
@Named("validateUsername")
public class ValidateUsername implements RequestHandler<PreSignUpEvent, PreSignUpEvent> {

    @Override
    public PreSignUpEvent handleRequest(PreSignUpEvent input, Context context) {
 {
        LambdaLogger logger = context.getLogger();
        logger.log("input is "+input);
        return input;
}

logs:

{"region":"eu-west-1"} and version is ignored.

Do you have any idea ? Is it link to a reflection issue ?

Steps to Reproduce

Override RequestHandler<I, O> lambda,
Create a pojo that needs annotations to be deserialized