Btukfyl

I have an interface:

//@JsonDeserialize(as = ProjectEditor.class)

//@JsonDeserialize(using = ProjectEditorDeserializer.class)

@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.PROPERTY, property = "className")

//@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type")|

public interface IProjectEditor extends Serializable{

and I'm trying to call a rest api mehtod that gets as input IProjectEditor object:

@Override

public void fabricate(IProjectEditor projectEditor, String fabConfigName)

        throws FabricationException, SpecificationException {



    Invocation.Builder builder = baseTarget.path(apiPath + "/fabricate").queryParam("fabConfigName", fabConfigName).request(MediaType.APPLICATION_JSON);



    try {

        Response response = builder.post(Entity.json(projectEditor));

        checkResponseErrors(response);

    } catch (InternalErrortException e) {

        throw new FabricationException(e.getMessage());

    }

}

But I'm getting the following error:

Could not read document: Can not construct instance of ....IProjectEditor, problem: abstract types either need to be mapped to concrete types, have custom deserializer, or be instantiated with additional type information
at [Source: java.io.PushbackInputStream@f493da4; line: 1, column: 1]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of ....IProjectEditor, problem: abstract types either need to be mapped to concrete types, have custom deserializer, or be instantiated with additional type information
at [Source: java.io.PushbackInputStream@f493da4; line: 1, column: 1]

I tried following insructions from few posts:

Cannot construct instance of - Jackson

How to deserialize interface fields using Jackson's objectMapper?

https://www.baeldung.com/jackson-exception

https://hzhou.me/2015/04/23/Jackson-deserialize-nested-object/

But still not working for me!

I tried doing an external Deserializer but it will require changing components structures and moving classes.. the IProjectEditor is in one component and the ProjectEditor implementing it is in a different one... but when writing a Deserializer need both of them and it's causing a redirectional (cycle relation) between them:

import java.io.IOException;



import com.fasterxml.jackson.core.JsonParser;

import com.fasterxml.jackson.core.ObjectCodec;

import com.fasterxml.jackson.databind.DeserializationContext;

import com.fasterxml.jackson.databind.JsonDeserializer;

import com.fasterxml.jackson.databind.JsonNode;

import com.fasterxml.jackson.databind.ObjectMapper;

import ...IProjectEditor;

import ...ProjectEditor;



public class ProjectEditorDeserializer extends JsonDeserializer<IProjectEditor> {



    @Override

    public IProjectEditor deserialize(JsonParser jsonParser, DeserializationContext ctxt) throws IOException {

        ProjectEditor result = null;

        ObjectCodec oc = jsonParser.getCodec();



        JsonNode node = oc.readTree(jsonParser);



        ObjectMapper mapper = new ObjectMapper();

        for (JsonNode n : node) {

            result = mapper.treeToValue(n, ProjectEditor.class);

        }



        return result;

    }



}