Merge pull request #16279 from zeesh49/BAEL-7692-Join-Queries
Bael 7692 join queries
This commit is contained in:
Maiklins
GitHub
commit
f8fe72540d
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package com.baeldung.spring.data.jpa.joinquery;
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import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
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import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
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import org.springframework.orm.jpa.JpaTransactionManager;
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import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
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import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
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import javax.sql.DataSource;
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import java.util.Properties;
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@Configuration
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@EnableAutoConfiguration
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public class AppConfig {
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@Bean
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public DataSource dataSource() {
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return new EmbeddedDatabaseBuilder().setType(EmbeddedDatabaseType.H2)
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.build();
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}
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@Bean
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public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {
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LocalContainerEntityManagerFactoryBean emf = new LocalContainerEntityManagerFactoryBean();
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emf.setDataSource(dataSource);
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emf.setPackagesToScan("com.baeldung.spring.data.jpa.joinquery.entities"
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, "com.baeldung.spring.data.jpa.joinquery.DTO"
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, "com.baeldung.spring.data.jpa.joinquery.repositories");
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emf.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
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emf.setJpaProperties(getHibernateProperties());
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return emf;
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}
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@Bean
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public JpaTransactionManager transactionManager(LocalContainerEntityManagerFactoryBean entityManagerFactory) {
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return new JpaTransactionManager(entityManagerFactory.getObject());
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}
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private Properties getHibernateProperties() {
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Properties properties = new Properties();
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properties.setProperty("hibernate.hbm2ddl.auto", "create");
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properties.setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect");
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return properties;
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}
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}
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package com.baeldung.spring.data.jpa.joinquery.DTO;
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import jakarta.persistence.Entity;
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import jakarta.persistence.Id;
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import jakarta.persistence.IdClass;
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import org.springframework.context.annotation.Bean;
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import java.time.LocalDate;
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class DTO {
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private Long customer_id;
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private Long order_id;
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private Long product_id;
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public DTO(Long customer_id, Long order_id, Long product_id) {
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this.customer_id = customer_id;
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this.order_id = order_id;
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this.product_id = product_id;
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}
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}
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@Entity
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@IdClass(DTO.class)
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public class ResultDTO {
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@Id
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private Long customer_id;
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@Id
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private Long order_id;
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@Id
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private Long product_id;
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public void setCustomer_id(Long customer_id) {
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this.customer_id = customer_id;
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}
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public Long getProduct_id() {
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return product_id;
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}
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public void setProduct_id(Long product_id) {
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this.product_id = product_id;
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}
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public ResultDTO(Long customer_id, Long order_id, Long product_id, String customerName, String customerEmail, LocalDate orderDate, String productName, Double productPrice) {
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this.customer_id = customer_id;
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this.order_id = order_id;
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this.product_id = product_id;
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this.customerName = customerName;
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this.customerEmail = customerEmail;
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this.orderDate = orderDate;
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this.productName = productName;
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this.productPrice = productPrice;
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}
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private String customerName;
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private String customerEmail;
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private LocalDate orderDate;
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private String productName;
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private Double productPrice;
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public Long getCustomer_id() {
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return customer_id;
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}
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public void setCustoemr_id(Long custoemr_id) {
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this.customer_id = custoemr_id;
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}
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public String getCustomerName() {
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return customerName;
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}
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public void setCustomerName(String customerName) {
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this.customerName = customerName;
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}
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public String getCustomerEmail() {
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return customerEmail;
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}
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public void setCustomerEmail(String customerEmail) {
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this.customerEmail = customerEmail;
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}
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public Long getOrder_id() {
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return order_id;
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}
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public void setOrder_id(Long order_id) {
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this.order_id = order_id;
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}
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public LocalDate getOrderDate() {
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return orderDate;
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}
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public void setOrderDate(LocalDate orderDate) {
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this.orderDate = orderDate;
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}
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public String getProductName() {
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return productName;
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}
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public void setProductName(String productName) {
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this.productName = productName;
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}
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public Double getProductPrice() {
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return productPrice;
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}
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public void setProductPrice(Double productPrice) {
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this.productPrice = productPrice;
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}
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}
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package com.baeldung.spring.data.jpa.joinquery.DTO;
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import jakarta.persistence.Entity;
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import jakarta.persistence.Id;
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import jakarta.persistence.IdClass;
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import java.time.LocalDate;
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//@Entity
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//@IdClass(DTO.class)
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public class ResultDTO_wo_Ids {
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public ResultDTO_wo_Ids(String customerName, String customerEmail, LocalDate orderDate, String productName, Double productPrice) {
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this.customerName = customerName;
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this.customerEmail = customerEmail;
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this.orderDate = orderDate;
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this.productName = productName;
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this.productPrice = productPrice;
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}
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private String customerName;
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private String customerEmail;
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private LocalDate orderDate;
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private String productName;
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private Double productPrice;
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public String getCustomerName() {
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return customerName;
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}
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public void setCustomerName(String customerName) {
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this.customerName = customerName;
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}
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public String getCustomerEmail() {
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return customerEmail;
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}
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public void setCustomerEmail(String customerEmail) {
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this.customerEmail = customerEmail;
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}
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public LocalDate getOrderDate() {
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return orderDate;
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}
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public void setOrderDate(LocalDate orderDate) {
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this.orderDate = orderDate;
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}
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public String getProductName() {
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return productName;
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}
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public void setProductName(String productName) {
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this.productName = productName;
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}
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public Double getProductPrice() {
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return productPrice;
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}
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public void setProductPrice(Double productPrice) {
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this.productPrice = productPrice;
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}
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}
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package com.baeldung.spring.data.jpa.joinquery.entities;
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import jakarta.persistence.*;
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import java.time.LocalDate;
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import java.util.Objects;
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import java.util.Set;
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@Entity
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public class Customer {
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public Customer(){}
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@Id
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//@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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@OneToMany(mappedBy = "customer"
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, cascade = CascadeType.ALL)
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private Set<CustomerOrder> customerOrders;
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public Customer(Long id, Set<CustomerOrder> customerOrders, String email, LocalDate dob, String name) {
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this.id = id;
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this.customerOrders = customerOrders;
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this.email = email;
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this.dob = dob;
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this.name = name;
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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 void setCustomerOrders(Set<CustomerOrder> customerOrders) {
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this.customerOrders = customerOrders;
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}
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@Override
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public String toString() {
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return "Patient{" +
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"id=" + id +
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", orders=" + customerOrders +
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", email='" + email + '\'' +
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", dob=" + dob +
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", name='" + name + '\'' +
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'}';
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}
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public Set<CustomerOrder> getOrders() {
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return customerOrders;
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}
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public void setOrders(Set<CustomerOrder> orders) {
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this.customerOrders = orders;
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}
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@Column
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private String email;
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@Column(name = "dob", columnDefinition = "DATE")
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private LocalDate dob;
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@Column
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private String name;
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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Customer patient = (Customer) o;
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return Objects.equals(id, patient.id);
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}
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@Override
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public int hashCode() {
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return Objects.hash(id);
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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 String getEmail() {
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return email;
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}
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public void setEmail(String email) {
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this.email = email;
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}
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public LocalDate getDob() {
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return dob;
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}
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public void setDob(LocalDate dob) {
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this.dob = dob;
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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 void setName(String name) {
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this.name = name;
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}
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}
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package com.baeldung.spring.data.jpa.joinquery.entities;
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import jakarta.persistence.*;
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import java.time.LocalDate;
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import java.util.Objects;
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import java.util.Set;
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@Entity
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public class CustomerOrder {
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public CustomerOrder(){}
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@Id
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//@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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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 Set<Product> getProducts() {
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return products;
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}
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public void setProducts(Set<Product> products) {
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this.products = products;
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}
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@OneToMany(mappedBy = "customerOrder"
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, cascade = CascadeType.ALL)
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private Set<Product> products;
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@Column
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private LocalDate orderDate;
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public CustomerOrder(Long id, Set<Product> products, LocalDate orderDate, Customer customer) {
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this.id = id;
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this.products = products;
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this.orderDate = orderDate;
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this.customer = customer;
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}
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@Override
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public String toString() {
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return "Consult{" +
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"id=" + id +
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", products=" + products +
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", orderDate=" + orderDate +
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", customer=" + customer +
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'}';
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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CustomerOrder co = (CustomerOrder) o;
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return Objects.equals(id, co.id);
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}
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@Override
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public int hashCode() {
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return Objects.hash(id);
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}
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@ManyToOne(fetch = FetchType.LAZY)
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@JoinColumn(name="customer_id", nullable = false)
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private Customer customer;
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public Long getId() {
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return id;
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}
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public LocalDate getOrderDate() {
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return orderDate;
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}
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public void setOrderDate(LocalDate orderDate) {
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this.orderDate = orderDate;
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}
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public Customer getCustomer() {
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return customer;
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}
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public void setCustomer(Customer customer) {
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this.customer = customer;
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}
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}
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package com.baeldung.spring.data.jpa.joinquery.entities;
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import jakarta.persistence.*;
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import java.util.Objects;
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@Entity
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public class Product {
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public Product(){}
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@Id
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//@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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public Product(Long id, String productName, Double price, CustomerOrder customerOrder) {
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this.id = id;
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this.productName = productName;
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this.price = price;
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this.customerOrder = customerOrder;
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}
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@Column
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private String productName;
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@Column
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private Double price;
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@Override
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public String toString() {
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return "Dispense{" +
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"id=" + id +
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", productName='" + productName + '\'' +
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", price=" + price +
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'}';
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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Product dispense = (Product) o;
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return Objects.equals(id, dispense.id);
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}
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@Override
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public int hashCode() {
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return Objects.hash(id);
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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 void setId(Long id) {
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this.id = id;
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}
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public String getProductName() {
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return productName;
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}
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public void setProductName(String productName) {
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this.productName = productName;
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}
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public Double getPrice() {
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return price;
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}
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public void setPrice(Double price) {
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this.price = price;
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}
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public CustomerOrder getCustomerOrder() {
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return customerOrder;
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}
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public void setCustomerOrder(CustomerOrder co) {
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this.customerOrder = co;
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}
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@ManyToOne(fetch = FetchType.LAZY)
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@JoinColumn(name="customerorder_id", nullable = false)
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private CustomerOrder customerOrder;
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}
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package com.baeldung.spring.data.jpa.joinquery.repositories;
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import com.baeldung.spring.data.jpa.joinquery.entities.Customer;
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import org.springframework.data.repository.CrudRepository;
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import org.springframework.stereotype.Repository;
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@Repository
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public interface CustomerRepository extends CrudRepository<Customer, Long> {
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}
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@ -0,0 +1,34 @@
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package com.baeldung.spring.data.jpa.joinquery.repositories;
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import com.baeldung.spring.data.jpa.joinquery.DTO.ResultDTO;
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import com.baeldung.spring.data.jpa.joinquery.DTO.ResultDTO_wo_Ids;
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import org.springframework.data.jpa.repository.Query;
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import org.springframework.data.repository.CrudRepository;
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import org.springframework.stereotype.Repository;
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import java.util.List;
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import java.util.Map;
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@Repository
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public interface JoinRepository extends CrudRepository<ResultDTO, Long> {
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@Query(value = "SELECT new com.baeldung.spring.data.jpa.joinquery.DTO.ResultDTO(c.id, o.id, p.id, c.name, c.email, o.orderDate, p.productName, p.price) "
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+ " from Customer c, CustomerOrder o ,Product p "
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+ " where c.id=o.customer.id "
|
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+ " and o.id=p.customerOrder.id "
|
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+ " and c.id=?1 ")
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List<ResultDTO> findResultDTOByCustomer(Long id);
|
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|
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@Query(value = "SELECT new com.baeldung.spring.data.jpa.joinquery.DTO.ResultDTO_wo_Ids(c.name, c.email, o.orderDate, p.productName, p.price) "
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+ " from Customer c, CustomerOrder o ,Product p "
|
||||
+ " where c.id=o.customer.id "
|
||||
+ " and o.id=p.customerOrder.id "
|
||||
+ " and c.id=?1 ")
|
||||
List<ResultDTO_wo_Ids> findResultDTOByCustomerWithoutIds(Long id);
|
||||
|
||||
@Query(value = "SELECT c.*, o.*, p.* "
|
||||
+ " from Customer c, CustomerOrder o ,Product p "
|
||||
+ " where c.id=o.customer_id "
|
||||
+ " and o.id=p.customerOrder_id "
|
||||
+ " and c.id=?1 "
|
||||
, nativeQuery = true)
|
||||
List<Map<String, Object>> findByCustomer(Long id);
|
||||
}
|
||||
|
|
@ -0,0 +1,106 @@
|
|||
package com.baeldung.spring.data.jpa.joinquery;
|
||||
|
||||
import com.baeldung.spring.data.jpa.joinquery.DTO.ResultDTO_wo_Ids;
|
||||
import com.baeldung.spring.data.jpa.joinquery.entities.Customer;
|
||||
import com.baeldung.spring.data.jpa.joinquery.entities.CustomerOrder;
|
||||
import com.baeldung.spring.data.jpa.joinquery.DTO.ResultDTO;
|
||||
import com.baeldung.spring.data.jpa.joinquery.entities.Product;
|
||||
import com.baeldung.spring.data.jpa.joinquery.repositories.CustomerRepository;
|
||||
import jakarta.persistence.EntityManager;
|
||||
import jakarta.persistence.EntityManagerFactory;
|
||||
import jakarta.persistence.EntityTransaction;
|
||||
import jakarta.persistence.PersistenceUnit;
|
||||
import org.junit.jupiter.api.AfterEach;
|
||||
import org.junit.jupiter.api.BeforeEach;
|
||||
import org.junit.jupiter.api.Test;
|
||||
import org.junit.jupiter.api.extension.ExtendWith;
|
||||
import org.springframework.beans.factory.annotation.Autowired;
|
||||
import org.springframework.test.context.ContextConfiguration;
|
||||
import org.springframework.test.context.junit.jupiter.SpringExtension;
|
||||
import com.baeldung.spring.data.jpa.joinquery.repositories.JoinRepository;
|
||||
import java.time.LocalDate;
|
||||
import java.util.HashSet;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
import java.util.Set;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||
import static org.junit.jupiter.api.Assertions.assertInstanceOf;
|
||||
|
||||
@ExtendWith(SpringExtension.class)
|
||||
@ContextConfiguration(classes = { AppConfig.class })
|
||||
class JoinRepositoryUnitTest {
|
||||
|
||||
@Autowired
|
||||
JoinRepository joinRepository;
|
||||
|
||||
@Autowired
|
||||
CustomerRepository customerRepository;
|
||||
|
||||
@PersistenceUnit
|
||||
EntityManagerFactory entityManagerFactory;
|
||||
|
||||
EntityManager entityManager;
|
||||
|
||||
@BeforeEach
|
||||
void setUp() {
|
||||
customerRepository.deleteAll();
|
||||
entityManager = entityManagerFactory.createEntityManager();
|
||||
Customer c = new Customer(1L, null, "email1@email.com", LocalDate.now(), "Customer");
|
||||
CustomerOrder o1 = new CustomerOrder(1L, null, LocalDate.now(), c);
|
||||
CustomerOrder o2 = new CustomerOrder(2L, null, LocalDate.of(2024,1,1), c);
|
||||
|
||||
Product p1 = new Product(1L,"Product1", 25.20, o1);
|
||||
Product p2 = new Product(2L, "Product2", 26.20, o1);
|
||||
Product p3 = new Product(3L, "Product3", 27.20, o2);
|
||||
|
||||
Set<CustomerOrder> cos01 = new HashSet<>();
|
||||
cos01.add(o1);
|
||||
cos01.add(o2);
|
||||
Set<Product> productsO1 = new HashSet<>();
|
||||
productsO1.add(p1);
|
||||
productsO1.add(p2);
|
||||
Set<Product> productsO2 = new HashSet<>();
|
||||
productsO1.add(p3);
|
||||
|
||||
c.setCustomerOrders(cos01);
|
||||
o1.setProducts(productsO1);
|
||||
o2.setProducts(productsO2);
|
||||
|
||||
EntityTransaction et = getTransaction();
|
||||
entityManager.persist(c);
|
||||
entityManager.flush();
|
||||
et.commit();
|
||||
}
|
||||
|
||||
@AfterEach
|
||||
void tearDown() {
|
||||
}
|
||||
|
||||
@Test
|
||||
void whenFindResultDTOByCustomer_thenReturnResultDTO() {
|
||||
List<ResultDTO> resultDTO = joinRepository.findResultDTOByCustomer(1L);
|
||||
assertInstanceOf(ResultDTO.class, resultDTO.get(0));
|
||||
}
|
||||
|
||||
@Test
|
||||
void whenFindByCustomerNativeQuery_thenReturnMapsForObjects() {
|
||||
List<Map<String, Object>> res = joinRepository.findByCustomer(1L);
|
||||
//the map objects in the res List has 9 String keys aka 9 columns corresponding to the columns of customer, customerOrder, product
|
||||
res.forEach(map -> {
|
||||
assertEquals(9, map.keySet().size());
|
||||
});
|
||||
}
|
||||
|
||||
@Test
|
||||
void whenFindResultDTOByCustomerWithoutIds_thenReturnResultDTO() {
|
||||
List<ResultDTO_wo_Ids> resultDTO = joinRepository.findResultDTOByCustomerWithoutIds(1L);
|
||||
assertInstanceOf(ResultDTO_wo_Ids.class, resultDTO.get(0));
|
||||
}
|
||||
|
||||
private EntityTransaction getTransaction() {
|
||||
EntityTransaction transaction = entityManager.getTransaction();
|
||||
transaction.begin();
|
||||
return transaction;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue