CBOR Serialization and Deserialization using Jackson in Java
CBOR Serialization and Deserialization using Jackson in Java
CBOR (Concise Binary Object Representation) is a binary data serialization format that aims to be more compact and faster to parse than JSON or XML. Jackson is a popular Java library for handling JSON data, and it also provides support for CBOR serialization and deserialization. In this article, we will explore how to use Jackson to serialize and deserialize CBOR data in Java.
To use CBOR serialization and deserialization with Jackson, we need to include the Jackson CBOR module in our project. This module provides the necessary classes and annotations to work with CBOR data. We can add the module as a Maven dependency in our project's `pom.xml` file:
<dependency>
<groupId>com.fasterxml.jackson.dataformat</groupId>
<artifactId>jackson-dataformat-cbor</artifactId>
<version>2.12.1</version>
</dependency>
Once we have added the dependency, we can start using Jackson to serialize and deserialize CBOR data. Let's see how we can serialize an object to CBOR format:
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.cbor.CBORFactory;
public class CBORSerializationExample {
public static void main(String[] args) {
CBORFactory cborFactory = new CBORFactory();
ObjectMapper mapper = new ObjectMapper(cborFactory);
MyObject obj = new MyObject("Hello", 123);
try {
byte[] cborData = mapper.writeValueAsBytes(obj);
System.out.println("Serialized CBOR data: " + cborData);
} catch (JsonProcessingException e) {
e.printStackTrace();
}
}
}
class MyObject {
private String text;
private int number;
public MyObject() {
}
public MyObject(String text, int number) {
this.text = text;
this.number = number;
}
// getters and setters
}
In the above code, we create an instance of `CBORFactory` and pass it to the `ObjectMapper` constructor. Then, we create an instance of `MyObject` and serialize it to CBOR format using the `writeValueAsBytes` method of `ObjectMapper`. The resulting CBOR data is printed to the console.
Now, let's see how to deserialize CBOR data back to an object:
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.cbor.CBORFactory;
import java.io.IOException;
public class CBORDeserializationExample {
public static void main(String[] args) {
CBORFactory cborFactory = new CBORFactory();
ObjectMapper mapper = new ObjectMapper(cborFactory);
byte[] cborData = /* CBOR data bytes */;
try {
MyObject obj = mapper.readValue(cborData, MyObject.class);
System.out.println("Deserialized object: " + obj);
} catch (IOException e) {
e.printStackTrace();
}
}
}
class MyObject {
private String text;
private int number;
public MyObject() {
}
public MyObject(String text, int number) {
this.text = text;
this.number = number;
}
// getters and setters
@Override
public String toString() {
return "MyObject{" +
"text='" + text + '\'' +
", number=" + number +
'}';
}
}
In the above code, we first create an instance of `CBORFactory` and pass it to the `ObjectMapper` constructor. Then, we provide the CBOR data as input to the `readValue` method of `ObjectMapper`, along with the class type we want to deserialize to. The deserialized object is printed to the console.
That's it! We have seen how to use Jackson for CBOR serialization and deserialization in Java. With Jackson's support for CBOR, we can easily work with compact binary data in our Java applications.
