Java/EJB3/Entity Embeddable

Материал из Java эксперт
Версия от 06:50, 1 июня 2010; Admin (обсуждение | вклад) (1 версия)
(разн.) ← Предыдущая | Текущая версия (разн.) | Следующая → (разн.)
Перейти к: навигация, поиск

Entity With Embeddable Key

File: EmployeePK.java
import javax.persistence.Column;
import javax.persistence.Embeddable;
@Embeddable
public class EmployeePK implements java.io.Serializable {
  private String lastName;
  private long ssn;
  public EmployeePK() {
  }
  public EmployeePK(String lastName, long ssn) {
    this.lastName = lastName;
    this.ssn = ssn;
  }
  @Column(name="CUSTOMER_LAST_NAME")
  public String getLastName() {
    return this.lastName;
  }
  public void setLastName(String lastName) {
    this.lastName = lastName;
  }
  @Column(name="CUSTOMER_SSN")
  public long getSsn() {
    return ssn;
  }
  public void setSsn(long ssn) {
    this.ssn = ssn;
  }
  public boolean equals(Object obj) {
    if (obj == this)
      return true;
    if (!(obj instanceof EmployeePK))
      return false;
    EmployeePK pk = (EmployeePK) obj;
    if (!lastName.equals(pk.lastName))
      return false;
    if (ssn != pk.ssn)
      return false;
    return true;
  }
  public int hashCode() {
    return lastName.hashCode() + (int) ssn;
  }
}

File: EmployeeService.java

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless
public class EmployeeService implements EmployeeServiceLocal, EmployeeServiceRemote {
  @PersistenceContext(unitName="EmployeeService")
  EntityManager em;
  
  public EmployeeService() {
  }
  public void doAction(){
    EmployeePK pk = new EmployeePK("B", 9999999);
    Employee cust = new Employee();
    cust.setPk(pk);
    cust.setFirstName("B");  
    
    em.persist(cust);
    em.flush();
    System.out.println("saved");
    
  }
}
    

File: EmployeeServiceLocal.java

import java.util.Collection;
import javax.ejb.Local;
@Local
public interface EmployeeServiceLocal {
    public void doAction();
}

File: EmployeeServiceRemote.java


import java.util.Collection;
import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote{
  public void doAction();  
}

File: Employee.java
import java.io.Serializable;
import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.Column;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
import javax.persistence.Table;
import javax.persistence.Transient;
@Entity
@Table(name="EMP")
public class Employee implements Serializable {
  private String firstName;
  private EmployeePK pk;
  public String getFirstName() { return firstName; }
  public void setFirstName(String firstName) { this.firstName = firstName; }
  @EmbeddedId
  @AttributeOverrides({
      @AttributeOverride(name="lastName", column=@Column(name="LAST_NAME")),
      @AttributeOverride(name="ssn", column=@Column(name="SSN"))
  })
  public EmployeePK getPk() { return pk; }
  public void setPk(EmployeePK pk) { this.pk = pk; }
  @Transient
  public String getLastName() { return pk.getLastName(); }
  @Transient
  public long getSsn() { return pk.getSsn(); }
}

File: Main.java
import java.util.Collection;
import javax.naming.InitialContext;

public class Main {
  public static void main(String[] a) throws Exception {
    EmployeeServiceRemote service = null;
    // Context compEnv = (Context) new InitialContext().lookup("java:comp/env");
    // service = (HelloService)new InitialContext().lookup("java:comp/env/ejb/HelloService");
    service = (EmployeeServiceRemote) new InitialContext().lookup("EmployeeService/remote");
    
    
    
    
    service.doAction();
  }
}

File: jndi.properties
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=localhost:1099





Entity With Embedded Attribute

File: Employee.java
import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.Column;
import javax.persistence.Embedded;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
@Entity
public class Employee implements java.io.Serializable {
  private long id;
  private String firstName;
  private String lastName;
  private Address address;
  @Id
  @GeneratedValue
  public long getId() {
    return id;
  }
  public void setId(long id) {
    this.id = id;
  }
  public String getFirstName() {
    return firstName;
  }
  public void setFirstName(String first) {
    this.firstName = first;
  }
  public String getLastName() {
    return lastName;
  }
  public void setLastName(String last) {
    this.lastName = last;
  }
  @Embedded
  @AttributeOverrides( { @AttributeOverride(name = "street", column = @Column(name = "STREET")),
      @AttributeOverride(name = "city", column = @Column(name = "CITY")),
      @AttributeOverride(name = "state", column = @Column(name = "STATE")) })
  public Address getAddress() {
    return address;
  }
  public void setAddress(Address address) {
    this.address = address;
  }
}

File: EmployeeService.java

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless
public class EmployeeService implements EmployeeServiceLocal, EmployeeServiceRemote {
  @PersistenceContext(unitName="EmployeeService")
  EntityManager em;
  
  public EmployeeService() {
  }
  public void doAction(){
    Employee cust = new Employee();
    cust.setFirstName("B");
    cust.setLastName("B");
    Address address = new Address();
    address.setStreet("Street");
    address.setCity("Boston");
    address.setState("MA");
    cust.setAddress(address);
    
    em.persist(cust);
    em.flush();
    System.out.println("saved");
    
  }
}
    

File: EmployeeServiceLocal.java

import java.util.Collection;
import javax.ejb.Local;
@Local
public interface EmployeeServiceLocal {
    public void doAction();
}

File: EmployeeServiceRemote.java


import java.util.Collection;
import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote{
  public void doAction();  
}

File: Address.java

import javax.persistence.Column;
import javax.persistence.Embeddable;
@Embeddable
public class Address implements java.io.Serializable {
   private String street;
   private String city;
   private String state;
   @Column(name="STREET")
   public String getStreet() { return street; }
   public void setStreet(String street) { this.street = street; }
   @Column(name="CITY")
   public String getCity() { return city; }
   public void setCity(String city) { this.city = city; }
   @Column(name="STATE")
   public String getState() { return state; }
   public void setState(String state) { this.state = state; }
}

File: Main.java
import java.util.Collection;
import javax.naming.InitialContext;

public class Main {
  public static void main(String[] a) throws Exception {
    EmployeeServiceRemote service = null;
    // Context compEnv = (Context) new InitialContext().lookup("java:comp/env");
    // service = (HelloService)new InitialContext().lookup("java:comp/env/ejb/HelloService");
    service = (EmployeeServiceRemote) new InitialContext().lookup("EmployeeService/remote");
    
    
    
    
    service.doAction();
  }
}

File: jndi.properties
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=localhost:1099





Mark Embedded Id

File: EmployeePK.java
import javax.persistence.Column;
import javax.persistence.Embeddable;
@Embeddable
public class EmployeePK implements java.io.Serializable {
  private String lastName;
  private long ssn;
  public EmployeePK() {
  }
  public EmployeePK(String lastName, long ssn) {
    this.lastName = lastName;
    this.ssn = ssn;
  }
  @Column(name="CUSTOMER_LAST_NAME")
  public String getLastName() {
    return this.lastName;
  }
  public void setLastName(String lastName) {
    this.lastName = lastName;
  }
  @Column(name="CUSTOMER_SSN")
  public long getSsn() {
    return ssn;
  }
  public void setSsn(long ssn) {
    this.ssn = ssn;
  }
  public boolean equals(Object obj) {
    if (obj == this)
      return true;
    if (!(obj instanceof EmployeePK))
      return false;
    EmployeePK pk = (EmployeePK) obj;
    if (!lastName.equals(pk.lastName))
      return false;
    if (ssn != pk.ssn)
      return false;
    return true;
  }
  public int hashCode() {
    return lastName.hashCode() + (int) ssn;
  }
}

File: EmployeeService.java

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless
public class EmployeeService implements EmployeeServiceLocal, EmployeeServiceRemote {
  @PersistenceContext(unitName="EmployeeService")
  EntityManager em;
  
  public EmployeeService() {
  }
  public void doAction(){
    EmployeePK pk = new EmployeePK("B", 9999999);
    Employee cust = new Employee();
    cust.setPk(pk);
    cust.setFirstName("B");  
    
    em.persist(cust);
    em.flush();
    System.out.println("saved");
    
  }
}
    

File: EmployeeServiceLocal.java

import java.util.Collection;
import javax.ejb.Local;
@Local
public interface EmployeeServiceLocal {
    public void doAction();
}

File: EmployeeServiceRemote.java


import java.util.Collection;
import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote{
  public void doAction();  
}

File: Employee.java
import java.io.Serializable;
import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.Column;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
import javax.persistence.Table;
import javax.persistence.Transient;
@Entity
@Table(name="EMP")
public class Employee implements Serializable {
  private String firstName;
  private EmployeePK pk;
  public String getFirstName() { return firstName; }
  public void setFirstName(String firstName) { this.firstName = firstName; }
  @EmbeddedId
  @AttributeOverrides({
      @AttributeOverride(name="lastName", column=@Column(name="LAST_NAME")),
      @AttributeOverride(name="ssn", column=@Column(name="SSN"))
  })
  public EmployeePK getPk() { return pk; }
  public void setPk(EmployeePK pk) { this.pk = pk; }
  @Transient
  public String getLastName() { return pk.getLastName(); }
  @Transient
  public long getSsn() { return pk.getSsn(); }
}

File: jndi.properties
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=localhost:1099

File: Main.java
import java.util.Collection;
import javax.naming.InitialContext;

public class Main {
  public static void main(String[] a) throws Exception {
    EmployeeServiceRemote service = null;
    // Context compEnv = (Context) new InitialContext().lookup("java:comp/env");
    // service = (HelloService)new InitialContext().lookup("java:comp/env/ejb/HelloService");
    service = (EmployeeServiceRemote) new InitialContext().lookup("EmployeeService/remote");
    
    
    
    
    service.doAction();
  }
}


Источник — «http://jexp.ru/index.php?title=Java/EJB3/Entity_Embeddable&oldid=7753»