Dozer: Specify mappings via annotations

Using @Mapping annotation, we can define the mappings between to classes.

 

For example,

 

User.java

public class User {

	private Integer id;
	private String fName;
	private String lName;

	......
	......
}

 

Student.java

public class Student {
	private Integer id;

	@Mapping("fName")
	private String firstName;

	@Mapping("lName")
	private String lastName;

	.......
	.......
}

 

As you see above snippet, I specified the mappings using @Mapping annotation (this mapping is bi-directional).

 

a.   fName should be mapped to firstName

b.   lName should be mapped to lastName

 

Find the below working application.

 

 User.java

package com.sample.app.model;

public class User {

	private Integer id;
	private String fName;
	private String lName;

	public User() {
	}

	public User(Integer id, String fName, String lName) {
		this.id = id;
		this.fName = fName;
		this.lName = lName;
	}

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getfName() {
		return fName;
	}

	public void setfName(String fName) {
		this.fName = fName;
	}

	public String getlName() {
		return lName;
	}

	public void setlName(String lName) {
		this.lName = lName;
	}

	@Override
	public String toString() {
		return "User [id=" + id + ", fName=" + fName + ", lName=" + lName + "]";
	}

}

 

Student.java

package com.sample.app.model;

import org.dozer.Mapping;

public class Student {
	private Integer id;

	@Mapping("fName")
	private String firstName;

	@Mapping("lName")
	private String lastName;

	public Student() {
	}

	public Student(Integer id, String firstName, String lastName) {
		this.id = id;
		this.firstName = firstName;
		this.lastName = lastName;
	}

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getFirstName() {
		return firstName;
	}

	public void setFirstName(String firstName) {
		this.firstName = firstName;
	}

	public String getLastName() {
		return lastName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

	@Override
	public String toString() {
		return "Student [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + "]";
	}

}

 

CustomMappingWithAnnotations.java

package com.sample.app;

import java.io.IOException;

import org.dozer.DozerBeanMapper;

import com.sample.app.model.Student;
import com.sample.app.model.User;

public class CustomMappingWithAnnotations {

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

		DozerBeanMapper mapper = new DozerBeanMapper();

		User user1 = new User(1, "Arjun", "Gurram");
		Student student1 = mapper.map(user1, Student.class);
		User user2 = mapper.map(student1, User.class);

		System.out.println(user1);
		System.out.println(student1);
		System.out.println(user2);

	}

}

 

Output

User [id=1, fName=Arjun, lName=Gurram]
Student [id=1, firstName=Arjun, lastName=Gurram]
User [id=1, fName=Arjun, lName=Gurram]

 

  

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