Json not converting to object in spring integration

Question

I'm having

.transform(Transformers.fromJson(SNSMessage.class))

not return a value transformed from my JSON. The JSON input is

{
    "Type": "Notification",
    "MessageId": "b5c64f3f-59e3-5fce-9ad6-1e98973c9537",
    "TopicArn": "arn:aws:sns:us-east-1:194477963434:local-hera-update",
    "Subject": "com.accuity.hera.model.HeraNotification",
    "Message": "{\"id\":\"65e60559-cab5-4027-88a2-46185fbd50b9\",\"resourceType\":\"listItem\",\"action\":\"I\",\"timeOfAction\":\"2017-05-30T19:48:46Z\",\"source\":\"gwl\"}",
    "Timestamp": "2017-05-30T19:48:47.593Z",
    "SignatureVersion": "1",
    "Signature": "Xz0qg0byLMA1fwIRbi7aWcEzhtcLBOmzyUluL1W5URu4WaiEO3G\/+hPSpsFXGxcSYNYRgpKhL9QAP2qLkuMlSEMqiEOHaSr88UaB8QRV2lUEjdBAWpuFYVBPdb+jpo6n3m89vVHoYfFWk8yBkc0zuoRl4OYcUXfTZiWWQkkrT8r9OzWU8LxQwgf0jgr1xEoqbl7uMHIp7nHp3cKstQ0mbK6yxMQ8faxfDm+IwH3k8BBH2\/CXmRg9WME6JK77jvagMUHNhUahWKIjm4iz+TCQCdnmHQR21hmgxlkhdrSxZ1FBbk6BjxfX7gorEwwfY1gYNoZCXxsN63+4vSiFMlOAAQ==",
    "SigningCertURL": "https:\/\/sns.us-east-1.amazonaws.com\/SimpleNotificationService-b95095beb82e8f6a046b3aafc7f4149a.pem",
    "UnsubscribeURL": "https:\/\/sns.us-east-1.amazonaws.com\/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:us-east-1:194477963434:local-hera-update:7de3da56-9e6c-43ca-9abc-d46fff379380"
}

and the class definition is:

public class SNSMessage {
    private String Type;
    private String MessageId;
    private String TopicArn;
    private String Subject;
    private String Message;
    private String Timestamp;
    private String SignatureVersion;
    private String Signature;
    private String SigningCertURL;
    private String UnsubscribeURL;
}

any ideas why the SNSMessage is coming back with all its fields set to null?

Possible duplicate of stackoverflow.com/questions/26257622/… — Ivan Pronin
– Ivan Pronin, Commented May 31, 2017 at 19:26
Federico Piazza--jackson's ObjectMapper is the underlying implementation, — Don Hosek
– Don Hosek, Commented May 31, 2017 at 19:30
Ivan Pronin--there's no traceback happening and it's not a question of complicated structures as in the question you referenced. — Don Hosek
– Don Hosek, Commented May 31, 2017 at 19:31
@DonHosek, then can't you do ObjectMapper mapper = new ObjectMapper(); mapper.readValue(json, SNSMessage .class); ? — Federico Piazza
– Federico Piazza, Commented May 31, 2017 at 19:40

Federico Piazza · Accepted Answer · 2017-05-31 20:23:57Z

1

The problem you have is that your json attributes are using a different capitalization than your pojo properties.

It means you have Type as json attribute and type detected for your getter.

You need to use @JsonProperty annotation like this:

@JsonProperty("Type") 
private String type;
...
// getters / setters for type

Btw, if you don't want to follow the java naming standard and have Type as well as the pojo property, then just add the @JsonProperty to the property with no args

answered May 31, 2017 at 20:23

Federico Piazza

31.2k15 gold badges91 silver badges133 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Json not converting to object in spring integration

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related