java-maven-mapstruct-example

Java Maven using MapStruct (NetBeans IDE)

Example 1 - Source Destination Example using MapStruct

package com.medibank.javamavenmapstruct.source_dest_example

• SimpleDestination.java
• SimpleSource.java
• SimpleSourceDestinationMapper.java

Note: Ignore the error indicator in Netbeans (Bug)

Example 1 - How to run and test

Step 1 - Do a clean and build the project
Step 2 - Run a test

Example 1 - Create SimpleSourceDestinationMapperImpl automatically when Building the project

Note: No need to create this file because it's automatically created when you compile in the target/generated-sources/

package com.medibank.javamavenmapstruct.source_dest_example;

import javax.annotation.processing.Generated;

@Generated(
    value = "org.mapstruct.ap.MappingProcessor",
    date = "2024-03-04T09:53:13+1100",
    comments = "version: 1.5.5.Final, compiler: javac, environment: Java 11.0.22 (Amazon.com Inc.)"
)
public class SimpleSourceDestinationMapperImpl implements SimpleSourceDestinationMapper {

    @Override
    public SimpleDestination sourceToDestination(SimpleSource source) {
        if ( source == null ) {
            return null;
        }

        SimpleDestination simpleDestination = new SimpleDestination();

        simpleDestination.setName( source.getName() );
        simpleDestination.setDescription( source.getDescription() );

        return simpleDestination;
    }

    @Override
    public SimpleSource destinationToSource(SimpleDestination destination) {
        if ( destination == null ) {
            return null;
        }

        SimpleSource simpleSource = new SimpleSource();

        simpleSource.setName( destination.getName() );
        simpleSource.setDescription( destination.getDescription() );

        return simpleSource;
    }
}  

Example 2 - Student and Student Entity (Mapper)

• Student.java
• StudentEntity.java
• StudentMapper.java

StudentMapper.java

package com.medibank.javamavenmapstruct.student;

import org.mapstruct.Mapper;
import org.mapstruct.Mapping;

@Mapper
public interface StudentMapper {
   @Mapping(target="className", source="classVal")
   Student getModelFromEntity(StudentEntity student);

   @Mapping(target="classVal", source="className")
   StudentEntity getEntityFromModel(Student student);
}

package student;

import com.medibank.javamavenmapstruct.student.Student;
import com.medibank.javamavenmapstruct.student.StudentEntity;
import com.medibank.javamavenmapstruct.student.StudentMapper;
import static junit.framework.Assert.assertEquals;
import org.junit.Test;
import org.mapstruct.factory.Mappers;

public class StudentMapperTest {
    private StudentMapper studentMapper = Mappers.getMapper(StudentMapper.class);
    
   @Test
   public void testEntityToModel() {
      StudentEntity entity = new StudentEntity();
      entity.setClassVal("X");
      entity.setName("John");
      entity.setId(1);
      Student model = studentMapper.getModelFromEntity(entity);
      assertEquals(entity.getClassVal(), model.getClassName());
      assertEquals(entity.getName(), model.getName());
      assertEquals(entity.getId(), model.getId());
   }
   
   @Test
   public void testModelToEntity() {
      Student model = new Student();
      model.setId(1);
      model.setName("John");
      model.setClassName("X");
      StudentEntity entity = studentMapper.getEntityFromModel(model);
      assertEquals(entity.getClassVal(), model.getClassName());
      assertEquals(entity.getName(), model.getName());
      assertEquals(entity.getId(), model.getId());
   }
}