Seeing the exception when I call the GET method in RestTemplate com.fasterxml.jackson.databind.JsonMappingException: N/A at [Source: (StringReader); line: 1, column: 13700] (through reference chain: com.homedepot.merch.meter.model.ResultSet[“issues”]->java.util.ArrayList[0]->com.homedepot.me…
Tag: jackson-databind
How to write common pojo deserializer for json attribute which can be an object and an array both?
Background: I am getting mismatchedInputException, when parsing json. com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize value of type java.util.ArrayList<Data> from Object value (token JsonToken.START_OBJECT) Problem: nodes is a json-array which contains data, which can be …
How to get Jackson To Throw An Error on Incorrect Casing On Deserialization
I have the following class: and my mapper looks as follows: Today, if someone messes up their json object for example messing up the capitalization on client: it will deserialize client to null. I’d like it to error because the casing is wrong. (And for any key that’s passed in with bad casing). I…
How to deserialize JSON with @JsonCreator and @JsonGetter
I have the JSON looks like the following: and I have a class Person: I need to deserialize and serialize it, but when I’m trying to deserialize this JSON I get unexpected result. Why when I’m trying to deserialize it the @JsonGetter annotation is used for it? How can I disable @JsonGetter annotati…
Setter in DTO just for integration testing?
I couldn’t find the info I’m looking for hence posting here for suggestion and getting to know better approach. I have an immutable DTO object like: Now I’m working on an integration test with testcontainer where I want the accountOpeningDate and installmentPaidDate to be dynamic value hence…
Global jackson ObjectMapper not registering custom serializer
I am using Java 17, spring-boot 2.6.3 with spring-webflux and spring-consul dependencies and I have the following class: Here’s my custom serializer. And my models are as simples as this: I can’t annotate my model class with @JsonSerialize(using = ModelSerializer.class) because it is in a dependen…
How to read value from JSON with Jackson Java
I have a JSON file: I want to get the items separately. I try to do, but the result did null: This is class for Items: What I do wrong? how correctly read value from items? Answer You didn’t handle the JSON array – items – properly, so as I commented under OP, all what you need to do is
gradle runtime dependency makes test fail because of jackson dependencies issue
On a JEE project running on Wildfly 15, I am trying to configure the logs to be in json format. Replicating what I have done dozens of times for some more recent Spring Boot projects, I am adding net.logstash.logback:logstash-logback-encoder:6.6 as a runtimeOnly dependency, as I plan to have a logback.xml con…
How do I set the coder for a PCollection<List> in Apache Beam?
I’m teaching myself Apache Beam, specifically for using in parsing JSON. I was able to create a simple example that parsed JSON to a POJO and POJO to CSV. It required that I use .setCoder() for my simple POJO class. The problem Now I am trying to skip the POJO step of parsing using some custom transform…
Different @JsonProperty config for READ and WRITE on same field?
I have a class (which cannot be modified) like When deserializing I get data like: As I cannot modify the Standing class I have a mix-in like: As the received json does not have positionNumber and positionText fields I use the @JsonPropery annotations. With Access.READ_ONLY I simply ignore the positionNumber …