Практическая работа 4. БД, Hibernate, Spring Data JPA

NauJava/pom.xml

@@ -1,12 +1,12 @@
 <?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
 		<version>4.0.3</version>
-		<relativePath/> <!-- lookup parent from repository -->
+		<relativePath/>
 	</parent>
 	<groupId>ru.andrmuratov</groupId>
 	<artifactId>NauJava</artifactId>
@@ -37,7 +37,18 @@
 
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-actuator-test</artifactId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.postgresql</groupId>
+			<artifactId>postgresql</artifactId>
+			<scope>runtime</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
 	</dependencies>
@@ -51,4 +62,4 @@
 		</plugins>
 	</build>
 
-</project>
+</project>

NauJava/src/main/java/ru/andrmuratov/NauJava/config/Config.java

@@ -4,7 +4,7 @@
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Scope;
-import org.springframework.boot.CommandLineRunner;
+//import org.springframework.boot.CommandLineRunner;
 import org.springframework.beans.factory.annotation.Value;
 import jakarta.annotation.PostConstruct;
 import ru.andrmuratov.NauJava.entity.Task;
@@ -33,8 +33,8 @@ public List<Task> taskContainer() {
         return new ArrayList<>();
     }
 
-    @Bean
-    public CommandLineRunner run(CommandProcessor processor) {
-        return args -> processor.start();
-    }
+//    @Bean
+//    public CommandLineRunner run(CommandProcessor processor) {
+//        return args -> processor.start();
+//    }
 }

NauJava/src/main/java/ru/andrmuratov/NauJava/dao/UserRepositoryCustom.java

@@ -0,0 +1,9 @@
+package ru.andrmuratov.NauJava.dao;
+
+import ru.andrmuratov.NauJava.entity.User;
+import java.util.List;
+
+public interface UserRepositoryCustom {
+    List<User> findByNameCriteria(String name);
+    List<User> findByRoleCriteria(String role);
+}

NauJava/src/main/java/ru/andrmuratov/NauJava/dao/UserRepositoryImpl.java

@@ -0,0 +1,43 @@
+package ru.andrmuratov.NauJava.dao;
+
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.criteria.CriteriaBuilder;
+import jakarta.persistence.criteria.CriteriaQuery;
+import jakarta.persistence.criteria.Predicate;
+import jakarta.persistence.criteria.Root;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+import ru.andrmuratov.NauJava.entity.User;
+
+import java.util.List;
+
+@Repository
+public class UserRepositoryImpl implements UserRepositoryCustom {
+
+    private final EntityManager entityManager;
+
+    @Autowired
+    public UserRepositoryImpl(EntityManager entityManager) {
+        this.entityManager = entityManager;
+    }
+
+    @Override
+    public List<User> findByNameCriteria(String name) {
+        CriteriaBuilder cb = entityManager.getCriteriaBuilder();
+        CriteriaQuery<User> cq = cb.createQuery(User.class);
+        Root<User> root = cq.from(User.class);
+        Predicate predicate = cb.equal(root.get("name"), name);
+        cq.select(root).where(predicate);
+        return entityManager.createQuery(cq).getResultList();
+    }
+
+    @Override
+    public List<User> findByRoleCriteria(String role) {
+        CriteriaBuilder cb = entityManager.getCriteriaBuilder();
+        CriteriaQuery<User> cq = cb.createQuery(User.class);
+        Root<User> root = cq.from(User.class);
+        Predicate predicate = cb.equal(root.get("role"), role);
+        cq.select(root).where(predicate);
+        return entityManager.createQuery(cq).getResultList();
+    }
+}

NauJava/src/main/java/ru/andrmuratov/NauJava/entity/Category.java

@@ -0,0 +1,30 @@
+package ru.andrmuratov.NauJava.entity;
+
+import jakarta.persistence.*;
+import java.util.List;
+
+@Entity
+@Table(name = "categories")
+public class Category {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false, unique = true)
+    private String name;
+
+    private String description;
+
+    @OneToMany(mappedBy = "category")
+    private List<Task> tasks;
+
+    public Category() {}
+    public Long getId() { return id; }
+    public void setId(Long id) { this.id = id; }
+    public String getName() { return name; }
+    public void setName(String name) { this.name = name; }
+    public String getDescription() { return description; }
+    public void setDescription(String description) { this.description = description; }
+    public List<Task> getTasks() { return tasks; }
+    public void setTasks(List<Task> tasks) { this.tasks = tasks; }
+}

NauJava/src/main/java/ru/andrmuratov/NauJava/entity/Comment.java

@@ -0,0 +1,31 @@
+package ru.andrmuratov.NauJava.entity;
+
+import jakarta.persistence.*;
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "comments")
+public class Comment {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false, length = 1000)
+    private String text;
+
+    private LocalDateTime createdAt;
+
+    @ManyToOne
+    @JoinColumn(name = "task_id", nullable = false)
+    private Task task;
+
+    public Comment() {}
+    public Long getId() { return id; }
+    public void setId(Long id) { this.id = id; }
+    public String getText() { return text; }
+    public void setText(String text) { this.text = text; }
+    public LocalDateTime getCreatedAt() { return createdAt; }
+    public void setCreatedAt(LocalDateTime createdAt) { this.createdAt = createdAt; }
+    public Task getTask() { return task; }
+    public void setTask(Task task) { this.task = task; }
+}

NauJava/src/main/java/ru/andrmuratov/NauJava/entity/Tag.java

@@ -0,0 +1,26 @@
+package ru.andrmuratov.NauJava.entity;
+
+import jakarta.persistence.*;
+import java.util.Set;
+
+@Entity
+@Table(name = "tags")
+public class Tag {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false, unique = true)
+    private String name;
+
+    @ManyToMany(mappedBy = "tags")
+    private Set<Task> tasks;
+
+    public Tag() {}
+    public Long getId() { return id; }
+    public void setId(Long id) { this.id = id; }
+    public String getName() { return name; }
+    public void setName(String name) { this.name = name; }
+    public Set<Task> getTasks() { return tasks; }
+    public void setTasks(Set<Task> tasks) { this.tasks = tasks; }
+}

NauJava/src/main/java/ru/andrmuratov/NauJava/entity/Task.java

@@ -1,66 +1,77 @@
 package ru.andrmuratov.NauJava.entity;
 
+import jakarta.persistence.*;
 import java.time.LocalDateTime;
+import java.util.List;
+import java.util.Set;
 
+@Entity
+@Table(name = "tasks")
 public class Task {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
+
+    @Column(nullable = false)
     private String title;
+
     private String description;
-    private Priority priority;
-    private Status status;
+
+    @Column(nullable = false)
+    private String status;
+
+    private String priority;
+
     private LocalDateTime deadline;
 
+    @ManyToOne
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
 
-    public Task() {}
+    @ManyToOne
+    @JoinColumn(name = "category_id")
+    private Category category;
 
+    @OneToMany(mappedBy = "task", cascade = CascadeType.ALL, orphanRemoval = true)
+    private List<Comment> comments;
 
-    public Task(Long id, String title, String description, Priority priority, Status status, LocalDateTime deadline) {
-        this.id = id;
-        this.title = title;
-        this.description = description;
-        this.priority = priority;
-        this.status = status;
-        this.deadline = deadline;
-    }
+    @ManyToMany
+    @JoinTable(
+            name = "task_tag",
+            joinColumns = @JoinColumn(name = "task_id"),
+            inverseJoinColumns = @JoinColumn(name = "tag_id")
+    )
+    private Set<Tag> tags;
+
+    public Task() {}
 
 
     public Long getId() { return id; }
     public void setId(Long id) { this.id = id; }
-
     public String getTitle() { return title; }
     public void setTitle(String title) { this.title = title; }
-
     public String getDescription() { return description; }
     public void setDescription(String description) { this.description = description; }
-
-    public Priority getPriority() { return priority; }
-    public void setPriority(Priority priority) { this.priority = priority; }
-
-    public Status getStatus() { return status; }
-    public void setStatus(Status status) { this.status = status; }
-
+    public String getStatus() { return status; }
+    public void setStatus(String status) { this.status = status; }
+    public String getPriority() { return priority; }
+    public void setPriority(String priority) { this.priority = priority; }
     public LocalDateTime getDeadline() { return deadline; }
     public void setDeadline(LocalDateTime deadline) { this.deadline = deadline; }
-
+    public User getUser() { return user; }
+    public void setUser(User user) { this.user = user; }
+    public Category getCategory() { return category; }
+    public void setCategory(Category category) { this.category = category; }
+    public List<Comment> getComments() { return comments; }
+    public void setComments(List<Comment> comments) { this.comments = comments; }
+    public Set<Tag> getTags() { return tags; }
+    public void setTags(Set<Tag> tags) { this.tags = tags; }
 
     public enum Priority {
         LOW, MEDIUM, HIGH
     }
 
-
     public enum Status {
         TODO, IN_PROGRESS, DONE
     }
-
-
-    @Override
-    public String toString() {
-        return "Task{" +
-                "id=" + id +
-                ", title='" + title + '\'' +
-                ", priority=" + priority +
-                ", status=" + status +
-                ", deadline=" + deadline +
-                '}';
-    }
 }