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‎HibernateSpringBootFluentApiAdditionalMethods/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.jpa</groupId>
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<artifactId>jpa</artifactId>
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<version>1.0</version>
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<packaging>jar</packaging>
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<name>jpa</name>
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<description>JPA project for Spring Boot</description>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.0.5.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-data-jpa</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-jdbc</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>mysql</groupId>
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<artifactId>mysql-connector-java</artifactId>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎HibernateSpringBootFluentApiAdditionalMethods/sample.png‎

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‎HibernateSpringBootFluentApiAdditionalMethods/src/main/java/com/jpa/OneToManyBidirectionalApplication.java‎

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package com.jpa;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.ApplicationRunner;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.context.annotation.Bean;
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@SpringBootApplication
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public class OneToManyBidirectionalApplication {
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@Autowired
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private TennisArenaService tennisArenaService;
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public static void main(String[] args) {
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SpringApplication.run(OneToManyBidirectionalApplication.class, args);
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}
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@Bean
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public ApplicationRunner init() {
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return args -> {
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tennisArenaService.registerTournamentAndTennisPlayers();
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tennisArenaService.displayAllTennisPlayers();
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};
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}
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}

‎HibernateSpringBootFluentApiAdditionalMethods/src/main/java/com/jpa/TennisArenaService.java‎

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package com.jpa;
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import java.util.List;
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import java.util.logging.Logger;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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@Service
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public class TennisArenaService {
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private static final Logger logger
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= Logger.getLogger(TennisArenaService.class.getName());
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private final TournamentRepository tournamentRepository;
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private final TennisPlayerRepository tennisPlayerRepository;
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public TennisArenaService(TournamentRepository tournamentRepository,
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TennisPlayerRepository tennisPlayerRepository) {
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this.tournamentRepository = tournamentRepository;
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this.tennisPlayerRepository = tennisPlayerRepository;
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}
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@Transactional
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public void registerTournamentAndTennisPlayers() {
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Tournament rolandGarros = new Tournament()
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.name("Roland Garros")
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.addTennisPlayer(new TennisPlayer().name("Roger Federer"))
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.addTennisPlayer(new TennisPlayer().name("Rafael Nadal"))
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.addTennisPlayer(new TennisPlayer().name("David Ferer"));
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tournamentRepository.save(rolandGarros);
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}
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public void displayAllTournaments() {
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List<Tournament> tournaments = tournamentRepository.findAll();
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tournaments.forEach((t) -> logger.info(() -> "Tournament name: " + t.getName()));
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}
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@Transactional(readOnly=true)
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public void displayAllTennisPlayers() {
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List<TennisPlayer> players = tennisPlayerRepository.findAll();
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players.forEach((p) -> logger.info(() -> "Player name: " + p.getName()
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+ " Tournament:" + p.getTournament().getName()));
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}
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}

‎HibernateSpringBootFluentApiAdditionalMethods/src/main/java/com/jpa/TennisPlayer.java‎

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package com.jpa;
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import java.io.Serializable;
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import javax.persistence.Entity;
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import javax.persistence.FetchType;
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import javax.persistence.GeneratedValue;
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import javax.persistence.GenerationType;
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import javax.persistence.Id;
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import javax.persistence.JoinColumn;
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import javax.persistence.ManyToOne;
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@Entity
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public class TennisPlayer implements Serializable {
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private static final long serialVersionUID = 1L;
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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private String name;
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@ManyToOne(fetch = FetchType.LAZY)
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@JoinColumn(name = "tournament_id")
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private Tournament tournament;
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public Long getId() {
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return id;
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}
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public TennisPlayer id(Long id) {
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this.id = id;
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return this;
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}
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public void setId(Long id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public TennisPlayer name(String name) {
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this.name = name;
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return this;
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}
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public void setName(String name) {
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this.name = name;
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}
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public Tournament getTournament() {
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return tournament;
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}
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public TennisPlayer tournament(Tournament tournament) {
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this.tournament = tournament;
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return this;
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}
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public void setTournament(Tournament tournament) {
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this.tournament = tournament;
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj) {
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return true;
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}
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if (!(obj instanceof TennisPlayer)) {
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return false;
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}
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return id != null && id.equals(((TennisPlayer) obj).id);
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}
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@Override
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public int hashCode() {
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return 2018;
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}
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}

‎HibernateSpringBootFluentApiAdditionalMethods/src/main/java/com/jpa/TennisPlayerRepository.java‎

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package com.jpa;
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import java.util.Optional;
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import org.springframework.data.jpa.repository.JpaRepository;
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import org.springframework.stereotype.Repository;
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import org.springframework.transaction.annotation.Transactional;
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@Repository
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public interface TennisPlayerRepository extends JpaRepository<TennisPlayer, Long> {
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@Transactional(readOnly=true)
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Optional<TennisPlayer> findByName(String name);
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}

‎HibernateSpringBootFluentApiAdditionalMethods/src/main/java/com/jpa/Tournament.java‎

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package com.jpa;
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import java.io.Serializable;
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import java.util.ArrayList;
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import java.util.List;
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import javax.persistence.CascadeType;
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import javax.persistence.Entity;
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import javax.persistence.GeneratedValue;
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import javax.persistence.GenerationType;
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import javax.persistence.Id;
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import javax.persistence.OneToMany;
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@Entity
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public class Tournament implements Serializable {
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private static final long serialVersionUID = 1L;
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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private String name;
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@OneToMany(cascade = CascadeType.ALL,
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mappedBy = "tournament", orphanRemoval = true)
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private List<TennisPlayer> tennisPlayers = new ArrayList<>();
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public Tournament addTennisPlayer(TennisPlayer tennisPlayer) {
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this.tennisPlayers.add(tennisPlayer.tournament(this));
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return this;
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}
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public Tournament removeTennisPlayer(TennisPlayer tennisPlayer) {
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this.tennisPlayers.remove(tennisPlayer.tournament(null));
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return this;
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}
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public Long getId() {
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return id;
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}
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public Tournament id(Long id) {
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this.id = id;
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return this;
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}
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public void setId(Long id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public Tournament name(String name) {
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this.name = name;
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return this;
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}
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public void setName(String name) {
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this.name = name;
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}
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public List<TennisPlayer> getTennisPlayers() {
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return tennisPlayers;
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}
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public Tournament tennisPlayers(List<TennisPlayer> tennisPlayers) {
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this.tennisPlayers = tennisPlayers;
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return this;
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}
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public void setTennisPlayers(List<TennisPlayer> tennisPlayers) {
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this.tennisPlayers = tennisPlayers;
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}
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}

‎HibernateSpringBootFluentApiAdditionalMethods/src/main/java/com/jpa/TournamentRepository.java‎

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package com.jpa;
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import org.springframework.data.jpa.repository.JpaRepository;
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import org.springframework.stereotype.Repository;
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@Repository
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public interface TournamentRepository extends JpaRepository<Tournament, Long> {
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Tournament findByName(String name);
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}
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‎HibernateSpringBootFluentApiAdditionalMethods/src/main/resources/application.properties‎

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spring.datasource.url=jdbc:mysql://localhost:3306/db_tennis?createDatabaseIfNotExist=true
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spring.datasource.username=root
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spring.datasource.password=root
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spring.jpa.hibernate.ddl-auto=create
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spring.jpa.show-sql=true
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spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect

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