Twitter Serial example

TwitterSerialExample.java

///usr/bin/env jbang "$0" "$@" ; exit $?

//JAVA 17

//DEPS com.twitter.serial:serial:0.1.6

/// https://github.com/twitter/Serial

import java.io.IOException;

import com.twitter.serial.serializer.CoreSerializers;
import com.twitter.serial.serializer.ObjectSerializer;
import com.twitter.serial.serializer.SerializationContext;
import com.twitter.serial.stream.Serial;
import com.twitter.serial.stream.SerializerInput;
import com.twitter.serial.stream.SerializerOutput;
import com.twitter.serial.stream.bytebuffer.ByteBufferSerial;

public class TwitterSerialExample {

    static record Patient (String name, int age ) {

        @Override
        public String toString() {
            return name + "," + age;
        }
    }//Patient

	static class PatientSerializer extends ObjectSerializer<Patient> {
        private PatientSerializer(){}

        private static PatientSerializer instance = null;

        static PatientSerializer getInstance() {
            if( instance == null)
                instance = new PatientSerializer();

            return instance;
        }

		@Override
		protected void serializeObject(SerializationContext context, SerializerOutput output, Patient patient) throws IOException {
			output.writeObjectStart(0, "Patient");
			
			output.writeString( patient.name() );
			output.writeInt( patient.age() );
			
			output.writeObjectEnd();
		}
		
		@Override
		protected Patient deserializeObject(SerializationContext context, SerializerInput input, int versionNumber) throws IOException, ClassNotFoundException {
			System.out.println(versionNumber);
            int version = input.readObjectStart();

			String name = input.readNotNullString();
			int age = input.readInt();

			input.readObjectEnd();
			
			return new Patient(name, age);
		}
	}//PatientSerializer

    public static void main(String[] args) throws Exception {

        // ---------- serialize a String using CoreSerializers
        String text = "Visit Burgos";
		
		final Serial serial = new ByteBufferSerial();
		
		final byte[] serializedText = serial.toByteArray(text, CoreSerializers.STRING);
		
		System.out.println( serializedText );

        // ---------- deserialize a String using CoreSerializers
		final String t = serial.fromByteArray(serializedText, CoreSerializers.STRING);
		
		System.out.println( t );



        // ---------- serialize an Object

		Patient patient = new Patient("Art Vandelay", 38);
		
		final byte[] serializedObject = serial.toByteArray(patient, PatientSerializer.getInstance());
		
		System.out.println( serializedObject );

        // ---------- deserialize an Object
		Patient p = serial.fromByteArray(serializedObject, PatientSerializer.getInstance());
		
		System.out.println( p );

    }

}