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‎HibernateSpringBootDtoSqlResultSetMappingAndNamedNativeQuery/nbactions.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<actions>
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<action>
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<actionName>run</actionName>
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<packagings>
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<packaging>jar</packaging>
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</packagings>
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<goals>
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<goal>spring-boot:run</goal>
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</goals>
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<properties>
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<spring-boot.run.jvmArguments>-noverify -XX:TieredStopAtLevel=1 </spring-boot.run.jvmArguments>
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<spring-boot.run.mainClass>com.jpa.JpaApplication</spring-boot.run.mainClass>
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<Env.SPRING_OUTPUT_ANSI_ENABLED>always</Env.SPRING_OUTPUT_ANSI_ENABLED>
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</properties>
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</action>
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<action>
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<actionName>debug</actionName>
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<packagings>
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<packaging>jar</packaging>
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</packagings>
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<goals>
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<goal>spring-boot:run</goal>
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</goals>
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<properties>
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<spring-boot.run.jvmArguments>-Xdebug -Xrunjdwp:transport=dt_socket,server=n,address=${jpda.address} -noverify -XX:TieredStopAtLevel=1 </spring-boot.run.jvmArguments>
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<spring-boot.run.mainClass>com.jpa.JpaApplication</spring-boot.run.mainClass>
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<Env.SPRING_OUTPUT_ANSI_ENABLED>always</Env.SPRING_OUTPUT_ANSI_ENABLED>
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<jpda.listen>true</jpda.listen>
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</properties>
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</action>
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<action>
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<actionName>profile</actionName>
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<packagings>
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<packaging>jar</packaging>
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</packagings>
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<goals>
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<goal>process-classes</goal>
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<goal>org.codehaus.mojo:exec-maven-plugin:1.2.1:exec</goal>
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</goals>
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<properties>
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<exec.args>-classpath %classpath com.jpa.JpaApplication</exec.args>
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<exec.executable>java</exec.executable>
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</properties>
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</action>
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</actions>

‎HibernateSpringBootDtoSqlResultSetMappingAndNamedNativeQuery/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>

‎HibernateSpringBootDtoSqlResultSetMappingAndNamedNativeQuery/src/main/java/com/jpa/Car.java

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package com.jpa;
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import java.io.Serializable;
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import javax.persistence.ColumnResult;
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import javax.persistence.ConstructorResult;
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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.NamedNativeQuery;
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import javax.persistence.SqlResultSetMapping;
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import javax.persistence.Table;
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@NamedNativeQuery(
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name="CarDto",
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query="select c.name as name, c.color as color from Car c",
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resultSetMapping="CarDto"
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)
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@SqlResultSetMapping(
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name="CarDto",
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classes=@ConstructorResult(
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targetClass=CarDto.class,
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columns={
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@ColumnResult(name="name"),
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@ColumnResult(name="color")
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}
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)
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)
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@Entity
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@Table(name = "car")
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public class Car 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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private String engine;
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private String color;
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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 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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public String getEngine() {
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return engine;
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}
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public void setEngine(String engine) {
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this.engine = engine;
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}
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public String getColor() {
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return color;
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}
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public void setColor(String color) {
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this.color = color;
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}
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}

‎HibernateSpringBootDtoSqlResultSetMappingAndNamedNativeQuery/src/main/java/com/jpa/CarDto.java

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package com.jpa;
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import java.io.Serializable;
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public class CarDto implements Serializable {
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private static final long serialVersionUID = 1L;
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private final String name;
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private final String color;
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public CarDto(String name, String color) {
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this.name = name;
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this.color = color;
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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 String getColor() {
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return color;
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}
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@Override
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public String toString() {
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return "CarDto{" + "name=" + name + ", color=" + color + '}';
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}
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}

‎HibernateSpringBootDtoSqlResultSetMappingAndNamedNativeQuery/src/main/java/com/jpa/CarService.java

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package com.jpa;
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import java.util.List;
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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 CarService {
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private final Dao dao;
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public CarService(Dao dao) {
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this.dao = dao;
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}
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@Transactional
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public void populateCars() {
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Car car_1=new Car();
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car_1.setName("Dacia");
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car_1.setEngine("V8");
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car_1.setColor("red");
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Car car_2=new Car();
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car_2.setName("BMW");
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car_2.setEngine("V6");
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car_2.setColor("blue");
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dao.persist(car_1);
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dao.persist(car_2);
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}
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public List<CarDto> fetchCars() {
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return dao.fetchCars();
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}
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}

‎HibernateSpringBootDtoSqlResultSetMappingAndNamedNativeQuery/src/main/java/com/jpa/Dao.java

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package com.jpa;
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import java.io.Serializable;
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import java.util.List;
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import java.util.Objects;
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import javax.persistence.EntityManager;
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import javax.persistence.PersistenceContext;
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import javax.persistence.Query;
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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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@Transactional
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public class Dao<T, ID extends Serializable> implements GenericDao<T, ID> {
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@PersistenceContext
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private EntityManager entityManager;
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@Override
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public <S extends T> S persist(S entity) {
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Objects.requireNonNull(entity, "Cannot persist a null entity");
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entityManager.persist(entity);
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return entity;
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}
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@Transactional(readOnly=true)
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public List<CarDto> fetchCars() {
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Query query = entityManager.createNamedQuery("CarDto");
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List<CarDto> result = query.getResultList();
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return result;
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}
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protected EntityManager getEntityManager() {
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return entityManager;
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}
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}

‎HibernateSpringBootDtoSqlResultSetMappingAndNamedNativeQuery/src/main/java/com/jpa/DtoViaSqlResultSetMappingAndNamedNativeQueryApplication.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.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 DtoViaSqlResultSetMappingAndNamedNativeQueryApplication {
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private static final Logger logger
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= Logger.getLogger(DtoViaSqlResultSetMappingAndNamedNativeQueryApplication.class.getName());
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@Autowired
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private CarService carService;
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public static void main(String[] args) {
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SpringApplication.run(DtoViaSqlResultSetMappingAndNamedNativeQueryApplication.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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carService.populateCars();
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List<CarDto> cars = carService.fetchCars();
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cars.forEach((e) -> logger.info(() -> "Car: " + e));
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};
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}
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}

‎HibernateSpringBootDtoSqlResultSetMappingAndNamedNativeQuery/src/main/java/com/jpa/GenericDao.java

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package com.jpa;
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import java.io.Serializable;
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import java.util.List;
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public interface GenericDao<T, ID extends Serializable> {
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<S extends T> S persist(S entity);
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}

‎HibernateSpringBootDtoSqlResultSetMappingAndNamedNativeQuery/src/main/resources/application.properties

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spring.datasource.url=jdbc:mysql://localhost:3306/db_cars?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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