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UnrecognizedPropertyException when using Jackson, @JsonIdentityInfo and @JsonDeserialize with a lombok Builder


UnrecognizedPropertyException when using Jackson, @JsonIdentityInfo and @JsonDeserialize with a lombok Builder

By : Michael Coros
Date : October 23 2020, 08:10 AM
should help you out It fails when it's deserializing the @id field that was added by the @JsonIdentityInfo. You need to handle the @id field.
Adding @JsonIgnoreProperties to your builder will stop it failing.
code :
@JsonPOJOBuilder(withPrefix = "")
@JsonIgnoreProperties(ignoreUnknown=true)
public static class MainBuilder {
}
@JsonPOJOBuilder(withPrefix = "")
public static class MainBuilder {
    private int id;
    @JsonProperty(value="@id")
    public MainBuilder id() {
        this.id = id;
        return this;
    }
}


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Lombok Builder and Jackson Default values

Lombok Builder and Jackson Default values


By : Remya
Date : March 29 2020, 07:55 AM
I wish this help you I am not sure if you found an answer for this but I have determined WHY it doesn't work.
If youre interested in the process I went ahead and delomboked the source with a builder and @Builder.Default.
code :
java -jar lombok.jar delombok -p someFile.java
@Builder.Default String someValue = "defaultVar"
String someValue;

@java.lang.SuppressWarnings("all")
private static Optional<String> $default$someValue() {
    return "defaultVar";
}
Jackson JSONDeserialize + Builder with different field name?

Jackson JSONDeserialize + Builder with different field name?


By : sriram
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Error clearly says that Unrecognized field "has_profile" (class com.mypackagehere.something.$ProfilePrimaryData$Builder)
i.e has_profile is missing from Builder class, not ProfilePrimaryData class, so you have to annotate Builder class properties.
code :
@JsonDeserialize(builder = ProfilePrimaryData.Builder.class)
public class ProfilePrimaryData {

    /*
     * This annotation only needed, if you want to
     * serialize this field as has_profile,
     * 
     * <pre>
     * with annotation
     * {"has_profile":true}
     * 
     * without annotation
     * {"hasProfile":true}
     * <pre>
     *  
     */
    //@JsonProperty("has_profile")
    private final Boolean hasProfile;

    private ProfilePrimaryData(Boolean hasProfile) {
        this.hasProfile = hasProfile;
    }

    public Boolean getHasProfile() {
        return hasProfile;
    }

    @JsonPOJOBuilder(withPrefix = "")
    public static class Builder {

        // this annotation is required
        @JsonProperty("has_profile")
        private Boolean hasProfile;

        public Builder hasProfile(Boolean hasProfile) {
            this.hasProfile = hasProfile;
            return this;
        }

        public ProfilePrimaryData build() {
            return new ProfilePrimaryData(hasProfile);
        }
    }
}
Lombok builder pattern with jackson JsonProperty

Lombok builder pattern with jackson JsonProperty


By : Tom Adam
Date : March 29 2020, 07:55 AM
Any of those help You get this error because Jackson doesn't know how to map user_name to any of your UserBuilder fields.
You need @JsonProperty("user_name") on the userName field of UserBuilder too, like that:
code :
@JsonPOJOBuilder(withPrefix = "")
public static class UserBuilder {

    @JsonProperty("user_name")
    @NonNull
    private String userName;
}
How to use Jackson to deserialize external Lombok builder class

How to use Jackson to deserialize external Lombok builder class


By : adeo
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I have a 3rd party Lombok builder POJO, one that I cannot modify, that I want to serialize using jackson. Notably it does not have a NoArgsConstructor. , You can customize your ObjectMapper as follows:
code :
    ObjectMapper mapper = new ObjectMapper();
    mapper.setAnnotationIntrospector(new JacksonAnnotationIntrospector() {
        @Override
        public Class<?> findPOJOBuilder(AnnotatedClass ac) {
            if (ExternalClass.class.equals(ac.getRawType())) {
                return ExternalClass.ExternalClassBuilder.class;
            }
            return super.findPOJOBuilder(ac);
        }

        @Override
        public Value findPOJOBuilderConfig(AnnotatedClass ac) {
            if (ac.hasAnnotation(JsonPOJOBuilder.class)) {
                return super.findPOJOBuilderConfig(ac);
            }
            return new JsonPOJOBuilder.Value("build", "");
        }
    });
A Java builder class with JsonDeserialize Optional fields set as Optinal.empty. Set default value when JsonDeserialize

A Java builder class with JsonDeserialize Optional fields set as Optinal.empty. Set default value when JsonDeserialize


By : user3678712
Date : March 29 2020, 07:55 AM
To fix this issue Jackson has a set of modules that deal with JDK 8 datatypes, including Optional.
First, add the latest version as a Maven dependency:
code :
<dependency>
   <groupId>com.fasterxml.jackson.datatype</groupId>
   <artifactId>jackson-datatype-jdk8</artifactId>
   <version>2.10.2</version>
</dependency>
ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new Jdk8Module());
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