Type convertion issue

[shrexster42]

Please provide us with the following information:

This issue is for a: (mark with an x)

- [ x ] bug report -> please search issues before submitting
- [ ] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Minimal steps to reproduce

I have created a FunctionHandler as below

public class SendToDynamicsHandler extends FunctionInvoker<VendorIdentifier, BRParty> {

    @FunctionName("processVendor")
    public HttpResponseMessage execute(
            @HttpTrigger(name = "request", methods = {HttpMethod.GET, HttpMethod.POST}, authLevel = AuthorizationLevel.ANONYMOUS) HttpRequestMessage<Optional<VendorIdentifier>> request,
            ExecutionContext context) {
        VendorIdentifier vendorIdentifier = request.getBody().get();
        context.getLogger().info("Vendor Id" + vendorIdentifier.getPartyId());
        return request
                .createResponseBuilder(HttpStatus.OK)
                .body(handleRequest(vendorIdentifier, context))
                .header("Content-Type", "application/json")
                .build();
    }
}

and the VendorIdentifier POJO as

public class VendorIdentifier {
	
	@JsonProperty("party_id")
	private String partyId;
	
	@JsonProperty("status")
	private String status;

	public String getPartyId() {
		return partyId;
	}

	public void setPartyId(String partyId) {
		this.partyId = partyId;
	}

        public String getStatus() {
		return status;
	}

	public void setStatus(String status) {
		this.status = status;
	}
}

The payload sent to the function as

{
    "party_id": "VEN1234",
    "status": "APPROVED"
}

I see a type conversion issue when the function receives the parameter HttpRequestMessage<Optional<VendorIdentifier>> request. The partyId property is not populated in the VendorIdentifier and value is null. The status maps correctly as there is no difference between payload and the property in the pojo.

I have marked partyId using the jackson @JsonProperty annotation to handle mapping of the payload containing party_id field into partyId property, but it does not happen.

Any log messages given by the failure

None

Expected/desired behavior

Jackson annotations should be enforced and POJO mapped properly during type conversion

OS and Version?

Windows 7, 8 or 10. Linux (which distribution). macOS (Yosemite? El Capitan? Sierra?)

Windows 10.

Versions

Azure Functions CLI installed locally - v4.0.4544

Mention any other details that might be useful

Project built using maven as in the sample.

---

Thanks! We'll be in touch soon.