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Tag: jackson

Jackson mixin is ignored on serialization and deserialization

I need to be able to create a Java POJO from a JSON object when I only have an interface that can’t be changed. I’m hoping that Mixins can help make this possible. I created a Mixin that hopefully will work but can’t get Jackson to use it. It appears that Jackson is ignoring the Mixin I am defining for

Lombok returns null as a value of response

I’ve got a problem with my Api tests. When i’m trying to get data from api, lombok returns null as an acceptance value, but there are values with real numbers in api. Screenchot: https://prnt.sc/w98nt2 My DTO for the responce: My steps that extacts body and send post request public class PositionSteps { Api json responce getting properly. it means that

Jackson deserialization: Can I inject a value with an annotation on the field of the to deserializable object?

I have an object like this to deserialize: whereas the class Relation looks like this: RelationType is en enum and is not a value which will be deserialized, while all others are. Is it possible, that I could “inject” the enum value for the field relationType with an annotation on the field in the class RelationInput? Like the following Does

How to serialize a class that extends TreeSet with Jackson?

Class A looks like this: Class B: When I serialize a class A object using Jackson: I get a json Array like this: but the member variables a,b,c are missing. Is there a way I can include them into the json string? Answer Jackson recognises class A as a collection and register CollectionSerializer to serialise A’s instances. We can modify

How do you modify default enum (de)serialization for non-annotated enums but retain standard behavior (@JsonProperty/@JsonValue/…) in Jackson?

Currently jackson (uncustomized) serializes enums like this: If there is @JsonProperty or @JsonValue, they are used to derive serialized name Otherwise, standard serialization is carried out: index or toString() might be used (depending on the mapper settings), or .name() is called by default For deserialization, it’s like this: If there is @JsonProperty, @JsonValue or @JsonCreator, they influence deserialization Otherwise, standard

How to avoid Jackson escaping double quotes in Java?

I am working on a project and wanted to rewrite some code written in Gson to Jackson using ObjectMapper. So I am trying to create a JSON string using some properties as below: Expected result: Actual: So once I create a JSON String using Jackson, it turns out it is escaping double quotes for field names and values and adding

Spring Boot – Jackson EntityNotFoundException returns 200 instead of 500 response

Exception handler is returning 200 response even though I have specified it to return 500 in the handler (HttpStatus.INTERNAL_SERVER_ERROR) when encountering this exception. I am using Spring Boot v1.5.4.RELEASE. I am calling a Spring Boot service returning a JSON object. I am using a custom exception handler. When an EntityNotFoundException occurs during deserialization, instead of returning 500 response, it returns

Mapping to “” instead of null Jackson

I have a function that reads XML from a Kafka topic into String format, which I then want to convert to a JSON Object. Example XML: I then have POJO Classes such as: (with lombok getter/setter/toString and jackson annotation imports) I am then using a MappingJackson2XmlHttpMessageConverter to get an Object Mapper, and using that to map the XML string to

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