@JsonProperty(access = READ_ONLY) together with generated constructor (lombok) causes JsonMappingException: Could not find creator property with name [...]

[Raniz85]

The following class fails to deserialise with a com.fasterxml.jackson.databind.JsonMappingException: Could not find creator property with name 's' (in class LombokObject):

import com.fasterxml.jackson.annotation.JsonProperty;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

@AllArgsConstructor
@Getter
@Setter
@NoArgsConstructor
public class LombokObject {

    private String s;

    @JsonProperty(access = JsonProperty.Access.READ_ONLY)
    private Integer i;
}

Whereas the following class - which is functionally identical but with constructors, getters and setters in the code - can be deserialised:

import com.fasterxml.jackson.annotation.JsonProperty;

public class ManualObject {

    private String s;

    @JsonProperty(access = JsonProperty.Access.READ_ONLY)
    private Integer i;

    public ManualObject() {}

    public ManualObject(final String s, final Integer i) {
        this.s = s;
        this.i = i;
    }
    public String getS() {
        return s;
    }
    public void setS(final String s) {
        this.s = s;
    }
    public Integer getI() {
        return i;
    }
    public void setI(final Integer i) {
        this.i = i;
    }
}

The exception is

com.fasterxml.jackson.databind.JsonMappingException: Could not find creator property with name 's' (in class LombokObject)
 at [Source: {"s":"test"}; line: 1, column: 1]

    at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:261)
    at com.fasterxml.jackson.databind.DeserializationContext.reportMappingException(DeserializationContext.java:1233)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.addBeanProps(BeanDeserializerFactory.java:552)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.buildBeanDeserializer(BeanDeserializerFactory.java:226)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.createBeanDeserializer(BeanDeserializerFactory.java:141)
    at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer2(DeserializerCache.java:406)
    at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer(DeserializerCache.java:352)
    at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:264)
    at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:244)
    at com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:142)
    at com.fasterxml.jackson.databind.DeserializationContext.findRootValueDeserializer(DeserializationContext.java:475)
    at com.fasterxml.jackson.databind.ObjectMapper._findRootDeserializer(ObjectMapper.java:3890)
    at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3785)
    at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2833)

[Raniz85]

I made a sample project to illustrate the issue.

[cowtowncoder]

Thank you for reporting this. I think this is part of a known problem related to resolution of creator properties vs "regular" properties, where effectively the two can be out of sync. Unfortunately solving that issue is likely to require a major rewrite of property resolution, which is why the problem persists (in some form it has affected version from 2.6 to 2.8 I think).

[cowtowncoder]

I think this might be due to #1383 that I just fixed (to be included in 2.7.8 / 2.8.4).
If anyone can test with 2.7.8-SNAPSHOT / 2.8.4-SNAPSHOT, that'd be great. If not, I hope to find time soon to test with sample project.

[benneq]

I'm using Jackson 2.8.6 and get this error, too. Here's my test code:

@AllArgsConstructor
public static class Foo {
    @JsonProperty(access=Access.READ_ONLY)
    public String id;
    public String name;
}

ObjectMapper om = new ObjectMapper();
om.readValue("{\"name\":\"test\"}", Foo.class);

com.fasterxml.jackson.databind.JsonMappingException: Could not find creator property with name 'name'

The code works fine when deleting Access.READ_ONLY. Even WRITE_ONLY works fine.

[cowtowncoder]

@benneq Thank you, I can reproduce this.

[cowtowncoder]

Interesting. For some reason Creator properties are not being collected at all...

[cowtowncoder]

Ah ok. Due to one of parameters being READ_ONLY, constructor is not recognized as Creator -- all parameters must be recognized as valid properties. I will change code slightly not to do consistency check in this case (since there is no Creator to match to), which should allow usage to work. Important thing here is to retain no-args constructor.