package com.example.TablePerConcreteClassExample.model;

import java.util.List;

import javax.persistence.Column;
import javax.persistence.DiscriminatorColumn;
import javax.persistence.DiscriminatorValue;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Table;

@Entity
@Table(name="Employer")
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name="type")
@DiscriminatorValue(value="Employer")
public class Employer {

    @Id
    @Column (name = "empNo", nullable=false)
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int empNo;

    @Column(name = "name", nullable=false)
    private String nome;

    @OneToMany (mappedBy = "employer",
            fetch=FetchType.LAZY)
    private List<Veiculo> veiculos;

    public int getEmpNo() {
        return empNo;
    }

    public void setEmpNo(int empNo) {
        this.empNo = empNo;
    }

    public String getNome() {
        return nome;
    }

    public void setNome(String nome) {
        this.nome = nome;
    }

    public List<Veiculo> getVeiculos() {
        return veiculos;
    }

    public void setVeiculos(List<Veiculo> veiculos) {
        this.veiculos = veiculos;
    }


}

package com.example.TablePerConcreteClassExample.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

@Entity
@Table(name="Veiculo")
public class Veiculo {

    @Id
    @Column (name = "id", nullable=false)
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;

    @Column(name = "name", nullable=false)
    private String nome;


    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "empNo", nullable=false)
    private Employer employer;


    public int getId() {
        return id;
    }


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


    public String getNome() {
        return nome;
    }


    public void setNome(String nome) {
        this.nome = nome;
    }


    public Employer getEmployer() {
        return employer;
    }


    public void setEmployer(Employer employer) {
        this.employer = employer;
    }


}

spring.datasource.url=jdbc:mysql://localhost:3306/TablePerConcreteClass?createDatabaseIfNotExist=true&useSSL=false&useTimezone=true&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=
spring.jpa.database=MYSQL
spring.datasource.platform=mysql
spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true
spring.database.driverClassName=com.mysql.cj.jdbc.Driver
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect

spring.jpa.hibernate.ddl-auto=update

spring.jpa.show-sql=true

spring.servlet.multipart.enabled=true