Третья лабораторная, сущности+ 1 сервис.

backend/lab/build.gradle

@@ -14,7 +14,12 @@ repositories {
 
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
-	implementation 'org.testng:testng:7.1.0'
+
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'com.h2database:h2:2.1.210'
+
+	implementation group: 'org.springdoc', name: 'springdoc-openapi-ui', version: '1.6.5'
+
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }
 

backend/lab/src/main/java/com/example/lab/DataBaseLab3/Models/Cart.java

@@ -0,0 +1,41 @@
+package com.example.lab.DataBaseLab3.Models;
+
+import jakarta.persistence.*;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+@Entity
+public class Cart {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+
+    @OneToOne(fetch = FetchType.EAGER, mappedBy = "cart", cascade = CascadeType.ALL)
+    private Customer customer;
+    @ManyToMany(fetch = FetchType.EAGER, mappedBy = "products", cascade = CascadeType.ALL)
+    private List<Product> products;
+
+    public Cart() {
+        this.products = new ArrayList<>();
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) return true;
+        if (obj == null || getClass() != obj.getClass()) return false;
+        Cart cart = (Cart) obj;
+        return Objects.equals(id, cart.id);
+    }
+
+    @Override
+    public int hashCode(){
+        return Objects.hashCode(id);
+    }
+}

backend/lab/src/main/java/com/example/lab/DataBaseLab3/Models/Customer.java

@@ -0,0 +1,64 @@
+package com.example.lab.DataBaseLab3.Models;
+
+import jakarta.persistence.*;
+import java.util.Objects;
+
+@Entity
+public class Customer {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    @Column
+    private String firstName;
+    @Column
+    private String lastName;
+    @Column
+    private String customerAddress;
+
+    @OneToOne(fetch = FetchType.EAGER, mappedBy = "customer", cascade = CascadeType.ALL)
+    private Cart cart;
+
+    public Customer(){}
+
+    public Customer(String lastName, String firstName, String customerAddress) {
+        this.lastName = lastName;
+        this.firstName = firstName;
+        this.customerAddress = customerAddress;
+    }
+
+    public Long getId() {
+        return id;
+    }
+    public String getFirstName() {
+        return firstName;
+    }
+    public String getLastName() {
+        return lastName;
+    }
+
+    public String getCustomerAddress() {
+        return customerAddress;
+    }
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+    public void setCustomerAddress(String customerAddress) {
+        this.customerAddress = customerAddress;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) return true;
+        if (obj == null || getClass() != obj.getClass()) return false;
+        Customer customer = (Customer) obj;
+        return Objects.equals(id, customer.id);
+    }
+
+    @Override
+    public int hashCode(){
+        return Objects.hashCode(id);
+    }
+}

backend/lab/src/main/java/com/example/lab/DataBaseLab3/Models/Product.java

@@ -0,0 +1,52 @@
+package com.example.lab.DataBaseLab3.Models;
+
+import jakarta.persistence.*;
+
+import java.util.List;
+import java.util.Objects;
+
+@Entity
+public class Product {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    private String name;
+    private float price;
+
+    @ManyToMany(fetch = FetchType.EAGER, mappedBy = "carts", cascade = CascadeType.ALL)
+    private List<Cart> carts;
+    @ManyToOne(fetch = FetchType.EAGER)
+    @JoinColumn(name = "productCategory_fk")
+    private ProductCategory productCategory;
+
+    public Product(){}
+
+    public Product(String name, float price){
+        this.name = name;
+        this.price = price;
+    }
+
+    public Long getId() {
+        return id;
+    }
+    public String getName() {
+        return name;
+    }
+    public float getPrice() {
+        return price;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) return true;
+        if (obj == null || getClass() != obj.getClass()) return false;
+        Product product = (Product) obj;
+        return Objects.equals(id, product.id);
+    }
+
+    @Override
+    public int hashCode(){
+        return Objects.hashCode(id);
+    }
+
+}

backend/lab/src/main/java/com/example/lab/DataBaseLab3/Models/ProductCategory.java

@@ -0,0 +1,5 @@
+package com.example.lab.DataBaseLab3.Models;
+
+public class ProductCategory {
+
+}

backend/lab/src/main/java/com/example/lab/DataBaseLab3/Services/CustomerService.java

@@ -0,0 +1,66 @@
+package com.example.lab.DataBaseLab3.Services;
+import jakarta.persistence.*;
+import jakarta.transaction.Transactional;
+import org.springframework.stereotype.Service;
+import org.springframework.util.StringUtils;
+import com.example.lab.DataBaseLab3.Models.Customer;
+import java.util.List;
+
+@Service
+public class CustomerService {
+    @PersistenceContext
+    private EntityManager em;
+
+    @Transactional
+    public Customer addCustomer(String customerFirstName, String customerLastName, String customerAddress){
+        if (!StringUtils.hasText(customerFirstName) || !StringUtils.hasText(customerLastName)){
+            throw new IllegalArgumentException("Customer first and last names can't be null");
+        }
+        else if(!StringUtils.hasText(customerAddress)){
+            throw new IllegalArgumentException("Customer address can't be null");
+        }
+        Customer customer = new Customer(customerLastName, customerFirstName, customerAddress);
+        em.persist(customer);
+        return customer;
+    }
+
+    @Transactional()
+    public Customer getCustomer(Long id){
+        Customer customer = em.find(Customer.class, id);
+        if (customer == null){
+            throw new EntityNotFoundException(String.format("Error: Customer id %s not found", id));
+        }
+        return customer;
+    }
+
+    @Transactional
+    public List<Customer> getAllCustomers(){
+        return em.createQuery("get c from Customer c", Customer.class).getResultList();
+    }
+
+    @Transactional
+    public Customer updateCustomer(Long id, String customerLastName, String customerFirstName, String customerAddress){
+        if (!StringUtils.hasText(customerLastName) || !StringUtils.hasText(customerFirstName)){
+            throw new IllegalArgumentException("Customer last or/and first name is null");
+        }
+        if (!StringUtils.hasText(customerAddress)){
+            throw new IllegalArgumentException("Customer address can't be null");
+        }
+        final Customer customer = getCustomer(id);
+        customer.setLastName(customerLastName);
+        customer.setFirstName(customerFirstName);
+        customer.setCustomerAddress(customerAddress);
+        return em.merge(customer);
+    }
+
+    @Transactional
+    public Customer deleteCustomer(Long id){
+        final Customer customer = getCustomer(id);
+        em.remove(customer);
+        return customer;
+    }
+    @Transactional
+    public void deleteAllCustomers(){
+        em.createQuery("Delete from Customer");
+    }
+}

backend/lab/src/main/resources/application.properties

@@ -1 +1,11 @@
-
+spring.main.banner-mode=off
+#server.port=8080
+spring.datasource.url=jdbc:h2:file:./data
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=user
+spring.datasource.password=password
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
+spring.jpa.hibernate.ddl-auto=update
+spring.h2.console.enabled=true
+spring.h2.console.settings.trace=false
+spring.h2.console.settings.web-allow-others=false

backend/lab/src/test/java/resources/application.properties

@@ -0,0 +1,6 @@
+spring.datasource.url=jdbc:h2:mem:testdb
+spring.datasource.driverClassName=org.h2.Driver
+spring.datasource.username=user
+spring.datasource.password=password
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
+spring.jpa.hibernate.ddl-auto=create-drop