ProductPricingV0: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY

[dfreudenberger]

I'm working with Amazon's SP-API SDK to pull item offers using the Product Pricing V0 API.

However, when I make a batch request and any of the batched requests returns an error, the getItemOffersBatch method throws an IllegalStateException. Ideally, I'd like the request to go through, and for the response list to include a GetOffersResponse object filled with any errors that happened.

Please find attached one of the responses that will lead to the mentioned exception.

{
  "responses": [
    {
      "headers": {
        "x-amzn-RequestId": "f53e7f5f-61b8-4a2b-8d2e-028809d6eb84",
        "Date": "Tue, 19 Mar 2024 17:02:02 GMT"
      },
      "status": {
        "statusCode": 400,
        "reasonPhrase": "Bad Request"
      },
      "body": {
        "errors": [
          {
            "message": "B00ZUXG6GY is an invalid ASIN for marketplace A1PA6795UKMFR9",
            "details": "",
            "code": "InvalidInput"
          }
        ]
      },
      "request": {
        "MarketplaceId": "A1PA6795UKMFR9",
        "ItemCondition": "Used",
        "Asin": "B00ZUXG6GY"
      }
    }
  ]
}

Swagger codegen generates the following classes (stripped down to what is important) from the v0 model.

public class GetOffersResponse {
  @SerializedName("payload")
  private GetOffersResult payload = null;

  @SerializedName("errors")
  private ErrorList errors = null;
}

public class ErrorList {
  @SerializedName("errors")
  private List<Error> errors = new ArrayList<>();
}

public class Error {
  @SerializedName("code")
  private String code = null;

  @SerializedName("message")
  private String message = null;

  @SerializedName("details")
  private String details = null;
}