Disable Annotation

Usually we need to disable the Jackson annotation after completing its work. So, we use the disable() method of ObjectMapper class for disabling the annotation.

We pass the USE_ANNOTATIONS mapper feature to the disable() method of the ObjectMapper class.

Let's take an example to understand how to use the disable() method for disabling an annotation.

DisableAnnotationExample.java

//import required classes and package if any
import java.io.IOException;
import java.util.Scanner;

import com.fasterxml.jackson.annotation.JsonIgnoreType;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

//create class DisableAnnotationExample to understand the working of annotation
public class DisableAnnotationExample {
    
    //main() methods start
    @SuppressWarnings("deprecation")
    public static void main(String args[]) {
        
        // create an instance of ObjectMapper class
        ObjectMapper mapper = new ObjectMapper();
        ObjectMapper mapper1 = new ObjectMapper();
        
        // create Scanner class object
        Scanner sc= new Scanner(System.in);		
        
        // using try-catch for serializing Product
        try {
            
            Product product;
            
            String proId, proName, proPrice, proExpiry, proCode;
            
            System.out.println("Enter Product Id:");
            proId = sc.nextLine();
            
            System.out.println("Enter Product Name");
            proName = sc.nextLine();
            
            System.out.println("Enter Product Code");
            proCode = sc.nextLine();
            
            System.out.println("Enter Product Price");
            proPrice = sc.nextLine();
            
            System.out.println("Enter Product Expiry in dd-mm-yyyy format");
            proExpiry = sc.nextLine();
            
            // set values to Student object by using constructor
            product = new Product(proId, proName, proCode, proPrice, proExpiry);   
            
            String str = mapper
                .writerWithDefaultPrettyPrinter()
                .writeValueAsString(product);
            System.out.println(str);
            
            mapper1.disable(MapperFeature.USE_ANNOTATIONS);
            str = mapper1
                .writerWithDefaultPrettyPrinter()
                .writeValueAsString(product);
            System.out.println(str);
        }
        catch (IOException e) { 
            e.printStackTrace();
        }
        
        //close Scanner class object
        sc.close();
        
    }
}
//create class Product
class Product {  
    
    //Creating properties of Product class  
    public String proId;    
    public Name proName;    
    public String price;
    public String expire;
    
    // constructor
    Product(String proId, String name, String code, String price, String expire){
        this.proId = proId;
        proName = new Name(name, code);
        this.price = price;
        this.expire = expire;
    }
    
}
//create class Name
@JsonIgnoreType
class Name {
    public String name;
    Name(String fName, String code){
        name = fName+" ("+code+")";
    }       
}

Output: