package com.example.Mapping.Models;

import javax.persistence.*;
import java.util.List;

@Entity
public class Manufactures {

    // Unique identifier for the manufacturer
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;

    // Name of the manufacturer
    private String manufactures_name;

    // A manufacturer can have many models
    @OneToMany(mappedBy = "manufacturer")
    private List<Model> models;

    // Constructor with both id and name
    public Manufactures(int id, String manufactures_name) {
        this.id = id;
        this.manufactures_name = manufactures_name;
    }

    // Default constructor
    public Manufactures() {

    }

    // Getters and setters for id and name

    public int getId() {
        return id;
    }

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

    public String getManufactures_name() {
        return manufactures_name;
    }

    public void setManufactures_name(String manufactures_name) {
        this.manufactures_name = manufactures_name;
    }

    // Getter for models
    public List<Model> getModels() {
        return models;
    }

    // Setter for models
    public void setModels(List<Model> models) {
        this.models = models;
    }
}

package com.example.Mapping.Models;

import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;

@Entity
public class Model {

    // Unique identifier for the model
    @Id
    private int model_id;

    // Name of the model
    private String name;

    // A model belongs to one manufacturer
      // Foreign key referencing the manufacturer table
    @ManyToOne
    @JoinColumn(name = "manufacture_id")
    private Manufactures manufacturer;

    // Constructor with all fields
    public Model(int model_id, String name, Manufactures manufacturer) {
        this.model_id = model_id;
        this.name = name;
        this.manufacturer = manufacturer;
    }

    // Default constructor
    public Model() {

    }

    // Getters and setters

    public int getModel_id() {
        return model_id;
    }

    public void setModel_id(int model_id) {
        this.model_id = model_id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Manufactures getManufacturer() {
        return manufacturer;
    }

    public void setManufacturer(Manufactures manufacturer) {
        this.manufacturer = manufacturer;
    }
}

package com.example.Mapping.Repositories;

import com.example.Mapping.Models.Manufactures;
import org.springframework.data.jpa.repository.JpaRepository;

/**
 * Spring Data JPA repository for the Manufacture entity.
 * This interface extends JpaRepository and provides basic 
 * CRUD operations for Manufactures entities.
 */
public interface ManufacturesRepo extends JpaRepository<Manufactures, Integer> {
}

package com.example.Mapping.Repositories;

import com.example.Mapping.Models.Model;
import org.springframework.data.jpa.repository.JpaRepository;

/**
 * Spring Data JPA repository for the Model entity.
 * This interface extends JpaRepository and provides basic 
 * CRUD operations for Model entities.
 */
public interface ModelRepo extends JpaRepository<Model, Integer> {
}

package com.example.Mapping;

import com.example.Mapping.Models.Manufactures;
import com.example.Mapping.Models.Model;
import com.example.Mapping.Repositories.ManufacturesRepo;
import com.example.Mapping.Repositories.ModelRepo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * Spring Boot application for mapping relationships between Manufactures and Models.
 */
@SpringBootApplication
public class MappingApplication implements CommandLineRunner {

    // Injecting Manufactures and Model repositories using autowiring
    @Autowired
    private ManufacturesRepo manufacturesRepo;
    @Autowired
    private ModelRepo modelRepo;

    public static void main(String[] args) {
        SpringApplication.run(MappingApplication.class, args);
    }

    @Override
    public void run(String... args) throws Exception {

        // Creating a new Manufactures object with ID 1 and name "Honda"
        Manufactures data = new Manufactures(1, "Honda");

        // Saving the Manufactures record
        manufacturesRepo.save(data);

        // Creating two new Model objects associated with the "Honda" manufacturer
        Model model1 = new Model(1, "AYZ", data);
        Model model2 = new Model(2, "ZET", data);

        // Saving the Model records
        modelRepo.save(model1);
        modelRepo.save(model2);
    }
}