Questions tagged [jackson]

Introducing Jackson, a remarkable Java library designed to effortlessly handle essential tasks such as parsing, generating, and data binding for your Java objects. While its key function centers around JSON, rest assured that Jackson takes versatility to the next level by offering support for an extensive range of data formats including Avro, CBOR, CSV, Java Properties, Protobuf, Smile, XML, and YAML.

Jackson Library - com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException

Upon attempting to deserialize the Automobile class, I encounter an error where Jackson is searching for a field in the child element within the parent class. How can I ensure that Jackson uses the appropriate child type for deserialization? It seems like ...

Decode the implicit list in JSON format provided by the keys "1" and "2"

After retrieving this JSON data from an API, I need to convert it into a Java object. Here is the JSON structure: { "message" : "message", "1": { "packageCode": "packageCode1", " ...

Decoding JSON data into Java objects with RestTemplate and Jackson

I'm facing some challenges with deserializing JSON into Java objects within a Spring Boot 1.5 application using Jackson. Below is an example of the JSON response, which is an array containing a single JSON object with nested attributes: [ { "deploy ...

Check the validity of the JSON input object using Jackson library

My REST service includes a method that uses POST and consumes application/json. The argument of the method is another class that describes the fields required in the JSON input. Is there a way to configure Jackson to validate the input JSON before it enter ...

Jackson: A Guide to Extracting JSON Values

String url = "https://ko.wikipedia.org/w/api.php?action=query&format=json&list=search&srprop=sectiontitle&srlimit=1&srsearch=grand-theft-auto-v"; String result = restTemplate.getForObject(url, String.class); Map<String, String> ...

Nested Elements in Java JSON with Jackson

I have a JSON string that contains nested values. It looks something like this: "[{"listed_count":1720,"status":{"retweet_count":78}}]" I am interested in extracting the value of retweet_count. Currently, I am using Jackson to work with this data. The ...

Encountering a memory issue when trying to parse a hefty JSON file using the Jackson library in an Android

Currently, I am facing a challenge with parsing a substantial JSON response from the server using the Jackson library. The size of the JSON file is approximately 7-8 MB. The error that I encountered while running the code snippet below: ObjectMapper mapp ...

Retrieving a single value from the response entity JSON data

I am in need of connecting to a rest service in order to retrieve the user id using a token. List<Object> providers = new ArrayList<>(); providers.add(new JacksonJaxbJsonProvider()); client = WebClient.create(properties.getProperty(URL), prov ...

Experiencing challenges with utilizing @JsonCreator for handling nested JSON structures

I've encountered an interesting dilemma with an old piece of code that needs updating to include @JsonCreator in domain objects. The issue arises when the JSON structure doesn't quite match up with the Java backend structure. [{ "name" : "John", ...

The issue of parsing JSON data into objects

Consider an array scenario where the size is 1: the json data received will not contain [], for example: {"firstname":"tom"} On the other hand, when the size exceeds 1, the data received will include [], like this: [{"firstname":"tom"},{"firstname":"rob ...

Bug in RestEasy where Jettison is not correctly handling single element arrays

Problem description: RestEasy with Jettison When the array contains two elements, the format is: {"MyArray" : {"Array" : [{"a" : 1, "b" : 2}, {"a" : 3, "b" : 4}]}} However, when the array has a single element, the format is: {"MyArray" : {"Array" : {"a ...

Serialization of subclasses in Jackson is a concept that allows for

Here is an example showcasing a primary class (A) and its subclass (B), both of which can be utilized as properties in the general class X. public class A { @JsonProperty("primary_key") public final String primaryKey; @JsonCreator A(@JsonProp ...

Generate an array of JavaScript objects by converting a batch of JSON objects into objects within a Node.js environment

I am working with a prototype class: function customClass(){ this.a=77; } customClass.prototype.getValue = function(){ console.log(this.a); } and I also have an array of JSON objects: var data=[{a:21},{a:22},{a:23}]; Is there a way to cre ...

Is Jackson a suitable tool for conducting XSLT transformations?

Within our projects, we utilize Jackson for mapping between JSON and Java objects, as well as Jettison for converting XML input streams to JSON objects. One common scenario involves applying an XSLT transformation on an XML document to create a "JSONized" ...

Exploring the bounds of recursion: JPA relationship conundrums with OneToMany and Many

I have two Java Persistence API (JPA) entities, Message and File, that are related as follows: public class Message implements Serializable { ... @OneToMany(cascade = CascadeType.ALL, mappedBy = "message") @JsonManagedReference private List< ...

Exploring the differences between conditional serialization using JAXB and Jackson: An insight into External and Internal Views

As I develop a RESTful API, I encounter a scenario where I must present two different perspectives of my data - one for internal use and another for external exposure. Furthermore, my API should accommodate both XML and JSON formats. In the case of JSON r ...

Spring Jackson - Field "response" is not recognized and cannot be ignored within the context of the program

Trying to convert a jSon String to an Object using Jackson serialization. The jSon string that needs to be converted is: {"response":{"status":1,"count":"90120"}} Here's the Object structure: @JsonRootName("response") @JsonIgnoreProperties(ignoreUnknow ...

Exploring the Depths: A Guide to Selecting Nodes in Java Based on Depth

In my current JSON representation, I have the following structure: { "total": "555", "offset": "555", "hasMore": "false", "results": [ { "associations": { "workflowIds": [], "companyIds": [], "ownerIds": [], ...

Employ the Jackson JSON library without utilizing annotations

I am working with a package that includes an xsd file used to generate shared classes for our server and client applications, containing XML annotations. One of the clients is an Android App, and I need to use these classes for JSON deserialization as well ...

Working with JSON parsing in Gson or Jackson when a field can have two distinct types

My JSON data includes a field that contains two different types. "fields":[{"value":"ZIELONE OKO"},{"value":{"@nil":"true"}}] I am struggling with deserializing these values. The model class I am using has the following structure: private String value; ...

Leveraging Jackson Json for parsing Google Blogs articles

I've been facing difficulties in parsing this feed using the Jackson JSON Parser. Here's the feed: { "responseData": { "query": "Official Google Blogs", "entries": [ { "url": "http://googleblog.blogspot.com/feeds/posts/default", "title": "& ...

Creating a JSON representation of a List with Jackson's JsonGenerator

Is it possible to use Jackson JsonGenerator to write a list of objects to JSON easily? I have a hashmap structured as Key,List and would like to add a List of Objects without looping through each one individually. I am using Jackson JsonGenerator to creat ...

Omitting certain values in jackson

I am currently working with Object Mapper and I am seeking a way to exclude certain fields based on specific values. Imagine having an object structured like this: public static class Data { int id; int value; } Let's assume that the value ...

Exploring the extraction of dual values from a deeply nested JSON string using Jackson

I'm currently using the Jackson library for deserializing JSON data. Specifically, I am trying to extract only two values from this JSON - c1 and d1. Here is a snippet of the code I have used so far... How can I retrieve the correct approach to access the ...

Creating POJOs by parsing two JSON files, with one file referencing the other

I currently have two JSON files named occupations.json and people.json. The first file contains an array of occupations: [ { "name": "developer", "salary": "90000"}, { "name": "designer", "salary": "80000"}, { "name": "manager", "salary": "700 ...

Managing the visibility of foreign or packaged object attributes with JsonView

Within my data object, there is a combination of primitives and data objects from external libraries that I am utilizing in my project. Although I can use the @JsonView annotation to control which data is returned to the browser during Ajax calls, this app ...

Serializing and deserializing Tuples with Jackson in Scala using JSON

Here, I am attempting to perform a round-trip operation on a Tuple2 using the jackson-module-scala library in Scala 2.10.4. However, it seems that the serializer encodes the Tuple2 as a JSON array, leading to issues with deserialization. Why does this ha ...

Spring Boot does not validate JSON data types

Here is an example of a JSON data structure: "name": { "title": "Mr", "firstName": "somename", "middleName": "middleName", "lastName": "Micheal", "maid ...

Creating JSON from a Jersey resource: A comprehensive guide

I'm currently working with Jersey and aiming to generate JSON output containing specific fields only: [ { "name": "Holidays", "value": "http://www.google.com/calendar/feeds/usa__en%40holiday.calendar.google.com/public/basic" }, ...

What is a Brief Illustration of the Jackson Scala Extension?

Is there a straightforward example available for utilizing Jackson serialization and deserialization with the Scala module for version 2.10? I am specifically interested in achieving JSON conversion using reflection without needing to annotate or assign fi ...

Encountering issues with deserializing a JSON instance while attempting to parse a JSON file using Jackson

The data I have is stored in a Json file: [ { "name":"Move", "$$hashKey":"object:79", "time":11.32818, "endTime":18.615535 }, { "name":"First Red Flash", "$$hashKey":"object:77", "time":15.749153 }, { ...

"Enhance your web application with dynamic drop-down selection using Spring, Ajax

In my JSP file, I have a script that populates the list of states based on the selected country. The script fetches data from the controller and is supposed to display the list of states. However, after calling the controller method, the alert "received da ...

Jackson's @JsonView is not functioning properly as per expectations

Currently, I am working with Jackson JSON 1.9.12 in conjunction with SpringMVC. As part of this, I have created a data transfer object (dto) with JSON fields. To have two profiles of the same dto with different JSON fields, I took the approach of creating ...

The necessary set of dependencies for implementing the Jackson mapper

Recently, I started working with Jackson in my coding exercises. As I was exploring the new version of the Jackson library on Fasterxml's website: Jackson, I decided to add the following dependencies to my Maven POM-file: <dependency> <groupId ...

"Embarking on a journey with Jackson and the power

There have been numerous questions regarding the use of Jackson for serializing/deserializing Java objects using the builder pattern. Despite this, I am unable to understand why the following code is not functioning correctly. The Jackson version being use ...

What is the best way to convert a JSON string into an ObjectNode with Jackson library?

Can someone please clarify the distinctions between ObjectNode and JsonNode, as well as their respective applications? Additionally, how can I go about converting a JSON string into an ObjectNode? ...

Is there a way to convert a flat JSON into several instances of a sub-class through deserialization?

Here is a flat JSON string that needs to be deserialized in Java using Jackson: {"ccy":"EUR", "value1":500, "value2":200, "date":"2017-07-25", "type":"", ... <many other pairs>} To deserialize this JSON string, we can create the following ...

Conditionally omit objects during serialization using Jackson

I'm facing a challenge with a class structure in my project. Here's an example: interface IHideable { boolean isHidden(); } class Address implements IHideable { private String city; private String street; private boolean hidden; } class P ...

What is the best way to parse this JSON using Jackson?

My JSON data is structured like this: { "summary":{ "somefield1":"somevalue1", "Twilio":{ "field1":"value1", "field2":"value2" }, "Tropo":{ "field1":"value1", "field2":"va ...

modifying Json fieldName twice

Can the field name in a JSON be changed twice in a Spring REST API? While it may not have much meaning, I require this functionality. For instance, consider the JSON received from the remote service: { total_count : 1; } The Model class is defined a ...

Utilizing Jackson in Java Play Framework 2.3 to stream JSON data

I am wondering if there is a way to stream Json in my API response. After learning how to read and write a json file using the Jackson library from this example: Now, in the Play Framework, I want to know how I can stream my response or essentially retur ...

Managing Custom Boolean strings using Jackson Streaming API

Utilizing the Streaming API provided by Jackson for parsing JSON strings, I have a requirement to recognize "YES" as a boolean type. JsonFactory f = new JsonFactory(); Following that, I proceed with: JsonParser jp = f.createJsonParser(jsonString); Then ...

Encountering a HttpMediaTypeNotAcceptableException while making a jQuery ajax request after upgrading to Spring 3.2.4版本

Whenever I attempt to execute a jQuery ajax call, I am facing the HttpMediaTypeNotAcceptableException. The current configuration that I have includes: Within the context (which is in the classpath), I have the following: <context:component-scan base- ...

Error message indicating that the REST service response encountered an issue with java.io.IOException: UT010029 where the stream was

Having trouble with JSON conversion in a Spring Boot application? @Lob @Column(name = "attachment") private byte[] attachment; Are you encountering an exception like the following while working with REST services? If so, you may be facing issues with ...

The Jackson mapper outputs only the ID instead of the entire object

In my current project, I am employing Jackson 2.4.2 to map some Hibernate results. The issue I am encountering arises from the complexity of the Hibernate objects. Specifically, when dealing with a list of Hibernate objects, certain instances may referen ...

Creating a custom inner class in JAVA to handle complex JSON data involves defining a class within

I have gone through many posts but I can't seem to find a solution on how to create a class for this JSON. { "snippet": { "parentGroupId": "69ea5920-0157-1000-0000-0000028e1b90", "processors": {}, "processGroups": { ...

Display or hide object fields in Java based on REST requests

Is there a way to configure the Item class so that specific fields can be shown or hidden depending on the REST call being made? For instance, I would like to hide colorId (and show categoryId) from the User class when calling the XmlController and vice ...

Converting complex JSON structures to Java objects with Jackson's dynamic nested parsing

i'm struggling with parsing json data I have a json string that contains nested elements and I need to convert it into a java object. The structure of the string is quite complex and dynamic, so I'm wondering how to efficiently handle this using Jackson l ...

After making changes to the message converters, Jackson and Spring web are encountering issues with deserializing unquoted strings

In my spring controller method, I am accepting a String as the entire RequestBody like this: @RequestMapping(method=RequestMethod.POST) public @ResponseBody DTO method(@PathVariable("userId") long userId, @RequestBody String page) { // Co ...

Tips for saving styled text in an Oracle database and retrieving it as JSONContentType: Application/JSON

Is there a built-in functionality in Oracle that allows for storing rich text? I have added HTML tags to formatted text and want to know the correct way of saving it in the database. Upon fetching the stored text in a resultset, I am converting it to JSON ...

What could be the reason for receiving a 400 Bad Request error when sending a JSON payload through the int-http:outbound

What is the reason for getting a 400 Bad Request error when using JSON payload for int-http:outbound-gateway? The request below works fine on Chrome Rest Client with three specified headers in inObjgateway and JSON value of Obj. public class Obj { @J ...

Why does my JSON parser consume significantly more memory when utilizing the Streaming API?

My current code is parsing the whole file using jsonparse: ConcurrentHashMap<String, ValueClass<V>> space = new ConcurrentHashMap<String, ValueClass<V>> (); Map<String, ValueClass<V>> map = mapper.readValue(new FileRead ...

Ways to address conflicting getter definitions for a property in Jackson when the source code is not accessible

Encountering an issue that states: HTTP Status 500 - Could not write JSON: Conflicting getter definitions for property "oid" The root cause is the presence of two similar methods in the class: getOID (deprecated) and getOid Unfortunately, modi ...

Utilizing Spring MVC for efficient AJAX requests

I'm facing an issue while trying to convert a JSON object to a Java object in my controller using AJAX. I am currently using Jackson 2.2.3 and Spring 4.0.0. Can someone please help me identify where I might have gone wrong? Thank you. Here is a snippet fr ...

JSON is not conforming to the standard nesting level

After simplifying, the JSON implementation is as follows: Data(Entity)->"data"->another Entity I originally thought I could decrypt the Data object first, extract a type from it, and then use that type to decrypt the necessary type from the String "d ...

Importing JSON files into a HashMap using Jackson is a breeze

I am having trouble reading a json file into a Java HashMap. Below is the contents of my json file { "fieldA" : { "Preis": "100,00 €", "Text_de": "foo", "Text_en": "bar", "Materialnummer": "32400020" }, "field ...

Jackson can convert property fields starting with "property_" into a list during deserialization

My task involves serializing an object class: public class DigitalInput { private String id; private Date timestamp; private String matter; private String comment; private String channelId; private List<IndexableProperty> o ...

Collaborating with two-way JACKSON communication channels

Apologies for my poor English; Below is the code snippet in question: @JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id") public class UserAccount implements Serializable { private static final long seria ...

Reduce JSON for efficient deserialization and persistence of intricate POJOs using JPA/Hibernate

Dealing with deserialization of a complex POJO from a JSON string and persisting it in a MySQL database can be quite challenging. Below is a simplified example class: @Entity @Table(name="a") public class A{ private Long id; private B b; priva ...

Is it possible to deserialize this Json to the specified Java Dto using Jackson ObjectMapper without the need for a custom @JsonCreator?

I have created two Java classes named Request and Item: public class Request { private List<Item> subItems; public Request() { } public List<Item> getSubItems() { return subItems; } public void setSub ...

Dynamic encoding/decoding operations

Utilizing Spring MVC and Jackson, I manage the API for an application. Here's my challenge - we need to serialize the Person class in two different ways: @Entity Order{ String id; String name; String address; List<Items> items; ...

What is the proper method for deserializing .NET Dictionary objects with Jackson?

Here's a brief summary before diving into the detailed explanation below :-) I'm looking for help on deserializing a Dictionary using Jackson and a custom deserializer. Currently, I have an Android app communicating with a .NET (C#) server via JSON. In ...

Jackson utilizes varying deserializers for unique scenarios

Is it possible to utilize distinct deserializers for varying scenarios? For instance: public class Student { @JsonDeserialize(using = SomeAdeserializer.class) @JsonProperty("dob") Date dateOfBirth; } Could a different deserializer like S ...

Generate instances of the identical class with distinct attributes

Is it possible in Java to create objects of the same class with different variables each time? For instance: I have a method that retrieves data from a URL containing a JSON file, and I want to use this data to create a post object. ObjectMapper mapper ...

Jackson Inheritance: Mapping Objects Based on Unique JSON Key Names

Here is the json structure: { "fields": [ {"expression": "count(*)"}, {"column": "field1"}, ] } To implement inheritance, classes are created as follows: @JsonTypeInfo( use = JsonTypeInfo.Id.NAME) @JsonSubTypes({ @JsonSubType ...

A beginner's guide to implementing dot navigation within the Jackson JsonNode

Take a look at this code snippet: val parsedData = ObjectMapper().readTree(vcap) parsedData.get("spaces")?.firstOrNull()?.get("block1")?.asText() I'm interested in improving the readability of this code by using dot notation for navigation. Here's an ex ...

List all paths to the bottom nodes in a JSON file using Java

For instance: Consider the following json data: { "store": { "book": [ { "category": "reference", "author": "Nigel Rees", "title": "Sayings of the Century", "price": 8 ...

Steps to verify the contents of the JSON document

I am currently working on validating data within a JSON file using Java. I am utilizing the Jersey API to retrieve the JSON file as a JSONObject. JAVA: @Path("/file") public class UploadFile{ @POST @Produces(MediaType.APPLICATION_JSON) @Consumes(M ...

Jackson: Using JSON to convert values into keys

In Jackson, typically we define getters and setters in a class to print it as a JSON object. For example: public class MyClass { private Integer a; private Integer b; public myClass(Integer a, Integer b) { this.a = a; this ...

When using the combination of JBoss, RestEasy, and Jackson, you may encounter the error message: "Attempting to cast org.jboss.resteasy.core.ServerResponse to org.jboss.re

I am currently working on a REST Api using JBoss (AS 7.1), RestEasy, and Jackson. The web service returns an "Account" object, which is a simple POJO that was previously serialized in JSON without any issues. However, after making some changes to the code ...

Tips for converting a JSON map object into an array of objects using the Jackson library

Here is the JSON structure I am working with: { "blabla": { "1": { "foo": "foo1", "bar": "bar1" }, "22": { "foo": "foo22", "bar": "bar22" } } } This JSON represents a ...

Utilizing integer-based polymorphic deserialization instead of string-based approach in Jackson

Typically, when utilizing polymorphic deserialization with Jackson, I usually have a string field that corresponds to a particular class, and the implementation may look like this. @JsonTypeInfo( use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo. ...

Error in parsing JSON data: Unable to convert a string into a 'java.time.LocalDateTime' type

My request is being sent to an external service that includes an updatedDate property. @UpdateTimestamp @Column(name = "updated_date") private LocalDateTime updatedDate; After receiving the response in my DTO, I attempt to format the LocalDateTime proper ...

Distributing data from a JSON object into various classes

I am currently exploring a method to allocate certain properties of the "participants" objects into specific classes: This is the data format I am working with "participants": [ { "person_id": "18044029", "role_id": "35351535", ...

Jackson encountered difficulty in the conversion of JSON to a list of maps

In my spring-boot application, I have a controller that looks like this: @RequestMapping(path = { "/multiCommunication" }, consumes = { MediaType.APPLICATION_JSON_VALUE }, method = RequestMethod.POST) ResponseEntity<Object> multiCommunicatio ...