Initial commit

.gitignore

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+.idea
+**/*.iml
+**/target

README.md

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+# <img src="https://raw.githubusercontent.com/bobocode-projects/resources/master/image/logo_transparent_background.png" height=50/>Spring Data JPA exercises
+The list of exercises dedicated to training your *Spring Data JPA* skills
+
+### No pain, No gain :heavy_exclamation_mark:
+
+> Skill is only developed by hours and hours and hours of beating on your craft
+
+Working on real problems, you're focused on finding a solution. Learning new things, you're trying to understand how it works.
+It is important to have a different type of activities, which purpose is improving your skill 
+
+***An exercise** is a predefined task that you continuously implement to improve a certain skill* :muscle:
+##

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.bobocode</groupId>
+    <artifactId>spring-data-jpa-exercises</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <modules>
+        <module>spring-data-jpa-exercises-model</module>
+        <module>spring-data-jpa-exercises-util</module>
+    </modules>
+
+    <packaging>pom</packaging>
+
+    <properties>
+        <maven.compiler.source>1.10</maven.compiler.source>
+        <maven.compiler.target>1.10</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.data</groupId>
+            <artifactId>spring-data-jpa</artifactId>
+            <version>2.1.0.RELEASE</version>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <version>1.4.197</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>1.7.24</version>
+        </dependency>
+        <dependency>
+            <groupId>org.hibernate.javax.persistence</groupId>
+            <artifactId>hibernate-jpa-2.1-api</artifactId>
+            <version>1.0.2.Final</version>
+        </dependency>
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-core</artifactId>
+            <version>5.3.2.Final</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.2</version>
+        </dependency>
+
+
+        <!--Since JAXB APIs is no longer in default classpath in JDK 1.9 -->
+        <dependency>
+            <groupId>javax.xml.bind</groupId>
+            <artifactId>jaxb-api</artifactId>
+            <version>2.2.11</version>
+        </dependency>
+    </dependencies>
+
+</project>

spring-data-jpa-exercises-model/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>spring-data-jpa-exercises</artifactId>
+        <groupId>com.bobocode</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>spring-data-jpa-exercises-model</artifactId>
+
+
+</project>

spring-data-jpa-exercises-model/src/main/java/com/bobocode/model/Address.java

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+package com.bobocode.model;
+
+
+import lombok.*;
+
+import javax.persistence.*;
+import java.time.LocalDateTime;
+
+@NoArgsConstructor
+@Getter
+@Setter
+@EqualsAndHashCode(of = "id")
+@ToString(exclude = "user")
+@Entity
+@Table(name = "address")
+public class Address {
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Column(name = "city")
+    private String city;
+
+    @Column(name = "street")
+    private String street;
+
+    @Column(name = "street_number")
+    private String streetNumber;
+
+    @Column(name = "apartment_number")
+    private String apartmentNumber;
+
+    @Column(name = "zip_code")
+    private String zipCode;
+
+    @Column(name = "creation_date")
+    private LocalDateTime creationDate;
+
+    @OneToOne
+    @JoinColumn(name = "user_id")
+    private User user;
+}

spring-data-jpa-exercises-model/src/main/java/com/bobocode/model/Gender.java

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+package com.bobocode.model;
+
+public enum Gender {
+    MALE,
+    FEMALE
+}

spring-data-jpa-exercises-model/src/main/java/com/bobocode/model/Role.java

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+package com.bobocode.model;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+
+import javax.persistence.*;
+import java.time.LocalDateTime;
+import java.util.Objects;
+
+@NoArgsConstructor
+@Getter
+@Setter
+@ToString(exclude = "user")
+@Entity
+@Table(name = "role")
+public class Role {
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "role_type")
+    private RoleType roleType;
+
+    @Column(name = "creation_date")
+    private LocalDateTime creationDate = LocalDateTime.now();
+
+    @ManyToOne
+    @JoinColumn(name = "user_id")
+    private User user;
+
+    public static Role valueOf(RoleType roleType) {
+        return new Role(roleType);
+    }
+
+    private Role(RoleType roleType) {
+        this.roleType = roleType;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof Role)) return false;
+
+        Role role = (Role) o;
+
+        return Objects.equals(id, role.id);
+    }
+
+    @Override
+    public int hashCode() {
+        return 31;
+    }
+}

spring-data-jpa-exercises-model/src/main/java/com/bobocode/model/RoleType.java

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+package com.bobocode.model;
+
+public enum RoleType {
+    USER, ADMIN, OPERATOR, CUSTOMER
+}

spring-data-jpa-exercises-model/src/main/java/com/bobocode/model/User.java

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+package com.bobocode.model;
+
+import lombok.*;
+
+import javax.persistence.*;
+import java.time.LocalDate;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+
+@NoArgsConstructor
+@Getter
+@Setter
+@ToString
+@EqualsAndHashCode(of = "id")
+@Entity
+@Table(name = "user")
+public class User {
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Column(name = "first_name")
+    private String firstName;
+
+    @Column(name = "last_name")
+    private String lastName;
+
+    @Column(name = "email")
+    private String email;
+
+    @Column(name = "birthday")
+    private LocalDate birthday;
+
+    @Column(name = "creation_date")
+    private LocalDate creationDate;
+
+
+    @OneToOne(mappedBy = "user", cascade = CascadeType.ALL)
+    private Address address;
+
+    @Setter(AccessLevel.PRIVATE)
+    @OneToMany(mappedBy = "user", cascade = CascadeType.ALL, orphanRemoval = true)
+    private Set<Role> roles = new HashSet<>();
+
+    public void setAddress(Address address) {
+        address.setUser(this);
+        this.address = address;
+    }
+
+    public void addRole(Role role) {
+        roles.add(role);
+        role.setUser(this);
+    }
+
+    public void addRoles(List<Role> roles) {
+        this.roles.addAll(roles);
+        roles.forEach(role -> role.setUser(this));
+    }
+
+    public void removeRole(Role role) {
+        this.roles.remove(role);
+        role.setUser(null);
+    }
+}

spring-data-jpa-exercises-util/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>spring-data-jpa-exercises</artifactId>
+        <groupId>com.bobocode</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>spring-data-jpa-exercises-util</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.bobocode</groupId>
+            <artifactId>spring-data-jpa-exercises-model</artifactId>
+            <version>1.0-SNAPSHOT</version>
+        </dependency>
+        <dependency>
+            <groupId>io.codearte.jfairy</groupId>
+            <artifactId>jfairy</artifactId>
+            <version>0.5.7</version>
+        </dependency>
+    </dependencies>
+
+</project>

spring-data-jpa-exercises-util/src/main/java/com/bobocode/util/TestDataGenerator.java

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+package com.bobocode.util;
+
+
+import com.bobocode.model.Address;
+import com.bobocode.model.Role;
+import com.bobocode.model.RoleType;
+import com.bobocode.model.User;
+import io.codearte.jfairy.Fairy;
+import io.codearte.jfairy.producer.person.Person;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.Random;
+import java.util.function.Predicate;
+import java.util.stream.Stream;
+
+import static java.util.stream.Collectors.toList;
+
+public class TestDataGenerator {
+
+    private List<Role> generateRoleList() {
+        Random random = new Random();
+        Predicate<RoleType> randomPredicate = i -> random.nextBoolean();
+
+        return Stream.of(RoleType.values())
+                .filter(randomPredicate)
+                .map(Role::valueOf)
+                .collect(toList());
+    }
+
+    public  User generateUser(RoleType... roles) {
+        User user = generateUserWithoutRoles();
+        Stream.of(roles)
+                .map(Role::valueOf)
+                .forEach(user::addRole);
+
+        return user;
+    }
+
+    private User generateUserWithoutRoles() {
+        Fairy fairy = Fairy.create();
+        Person person = fairy.person();
+
+        User user = new User();
+        user.setFirstName(person.getFirstName());
+        user.setLastName(person.getLastName());
+        user.setEmail(person.getEmail());
+        user.setBirthday(LocalDate.of(
+                person.getDateOfBirth().getYear(),
+                person.getDateOfBirth().getMonthOfYear(),
+                person.getDateOfBirth().getDayOfMonth()));
+        user.setCreationDate(LocalDate.now());
+
+        Address address = generateAddress();
+        user.setAddress(address);
+
+        return user;
+    }
+
+
+    public User generateUser() {
+        User user = generateUserWithoutRoles();
+        user.addRoles(generateRoleList());
+
+        return user;
+    }
+
+    private Address generateAddress() {
+        Fairy fairy = Fairy.create();
+        Person person = fairy.person();
+
+        Address address = new Address();
+        address.setCity(person.getAddress().getCity());
+        address.setStreet(person.getAddress().getStreet());
+        address.setStreetNumber(person.getAddress().getStreetNumber());
+        address.setApartmentNumber(person.getAddress().getApartmentNumber());
+        address.setCreationDate(LocalDateTime.now());
+        address.setZipCode(person.getAddress().getPostalCode());
+
+        return address;
+    }
+
+}