Named Native Query : Native Query « JPA

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Java Tutorial » JPA » Native Query

22. 27. 2. Named Native Query

File: Employee.java


import java.util.ArrayList;

import java.util.Collection;



import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.JoinColumn;

import javax.persistence.ManyToOne;

import javax.persistence.NamedNativeQuery;

import javax.persistence.OneToMany;

import javax.persistence.OneToOne;

import javax.persistence.Table;



@Entity

@Table(name="EMP")

@NamedNativeQuery(

    name="myQuery",

    query = "SELECT emp1.emp_id, emp1.name, emp1.manager_id, " +

            "emp1.dept_id, emp1.address_id " +

            "FROM EMP emp1, EMP emp2 " +

            "WHERE ((emp2.EMP_ID = ?) AND (emp2.EMP_ID = emp1.MANAGER_ID))",

    resultClass=Employee.class

)

public class Employee {

    @Id

    @Column(name="EMP_ID")

    private int id;

    private String name;



    

    @OneToOne

    private Address address;

    

    @ManyToOne

    @JoinColumn(name="DEPT_ID")

    private Department department;

    

    @ManyToOne

    @JoinColumn(name="MANAGER_ID")

    private Employee manager;

    

    @OneToMany(mappedBy="manager")

    private Collection<Employee> directs = new ArrayList<Employee>();

    public int getId() {

        return id;

    }

    

    public void setId(int id) {

        this.id = id;

    }

    

    public String getName() {

        return name;

    }

    

    public void setName(String name) {

        this.name = name;

    }



    

    public Address getAddress() {

        return address;

    }

    

    public void setAddress(Address address) {

        this.address = address; 

    }

    

    public Department getDepartment() {

        return department;

    }

    

    public void setDepartment(Department department) {

        this.department = department;

    }

    

    public Collection<Employee> getDirects() {

        return directs;

    }



    

    public Employee getManager() {

        return manager;

    }

    

    public void setManager(Employee manager) {

        this.manager = manager;

    }



}





@Entity

 class Department {

    @Id @GeneratedValue(strategy=GenerationType.IDENTITY)

    private int id;

    private String name;



    public int getId() {

        return id;

    }

    

    public void setId(int id) {

        this.id = id;

    }

    

    public String getName() {

        return name;

    }

    

    public void setName(String deptName) {

        this.name = deptName;

    }



    public String toString() {

        return "Department id: " + getId() + 

               ", name: " + getName();

    }

}





@Entity

class Address {

    @Id

    private int id;

    private String street;

    private String city;

    private String state;

    private String zip;

    

    public int getId() {

        return id;

    }

    

    public void setId(int id) {

        this.id = id;

    }

    

    public String getStreet() {

        return street;

    }

    

    public void setStreet(String address) {

        this.street = address;

    }



    public String getCity() {

        return city;

    }



    public void setCity(String city) {

        this.city = city;

    }



    public String getState() {

        return state;

    }



    public void setState(String state) {

        this.state = state;

    }



    public String getZip() {

        return zip;

    }



    public void setZip(String zip) {

        this.zip = zip;

    }

    public String toString() {

        return "Address id: " + getId() + 

               ", street: " + getStreet() +

               ", city: " + getCity() +

               ", state: " + getState() +

               ", zip: " + getZip();

    }



}

File: Helper.java


import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.ResultSetMetaData;

import java.sql.Statement;



public class Helper {

  public static void checkData() throws Exception {

    Class.forName("org.hsqldb.jdbcDriver");

    Connection conn = DriverManager.getConnection("jdbc:hsqldb:data/tutorial", "sa", "");

    Statement st = conn.createStatement();



    ResultSet mrs = conn.getMetaData().getTables(null, null, null, new String[] { "TABLE" });

    while (mrs.next()) {

      String tableName = mrs.getString(3);

      System.out.println("\n\n\n\nTable Name: "+ tableName);



      ResultSet rs = st.executeQuery("select * from " + tableName);

      ResultSetMetaData metadata = rs.getMetaData();

      while (rs.next()) {

        System.out.println(" Row:");

        for (int i = 0; i < metadata.getColumnCount(); i++) {

          System.out.println("    Column Name: "+ metadata.getColumnLabel(i + 1)+ ",  ");

          System.out.println("    Column Type: "+ metadata.getColumnTypeName(i + 1)+ ":  ");

          Object value = rs.getObject(i + 1);

          System.out.println("    Column Value: "+value+"\n");

        }

      }

    }

  }

}

File: Main.java


import java.util.List;



import javax.persistence.EntityManager;

import javax.persistence.EntityManagerFactory;

import javax.persistence.Persistence;



public class Main {

  static EntityManagerFactory emf = Persistence.createEntityManagerFactory("JPAService");



  static EntityManager em = emf.createEntityManager();



  public static void main(String[] a) throws Exception {

    em.getTransaction().begin();



    int managerId = 1;

    

    List list =  em.createNamedQuery("myQuery")

    .setParameter(1, managerId)

    .getResultList();



    em.getTransaction().commit();

    em.close();

    emf.close();



    Helper.checkData();

  }

}

File: persistence.xml


<persistence xmlns="http://java.sun.com/xml/ns/persistence"

             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence" version="1.0">

  <persistence-unit name="JPAService" transaction-type="RESOURCE_LOCAL">

    <properties>

      <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect"/>

      <property name="hibernate.hbm2ddl.auto" value="update"/>

      <property name="hibernate.connection.driver_class" value="org.hsqldb.jdbcDriver"/>

      <property name="hibernate.connection.username" value="sa"/>

      <property name="hibernate.connection.password" value=""/>

      <property name="hibernate.connection.url" value="jdbc:hsqldb:data/tutorial"/>

    </properties>

  </persistence-unit>

</persistence>

Download: JPA-NamedNativeQuery.zip( 5,289 k)

22. 27. Native Query
	22. 27. 1.	Native Insert Statement With Parameter
	22. 27. 2.	Named Native Query
	22. 27. 3.	Execute Native Query

Named Native Query : Native Query « JPA « Java Tutorial