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package sample.jpa;

import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.PostLoad;
import javax.persistence.PostUpdate;
import javax.persistence.PrePersist;
import javax.persistence.PreUpdate;
import javax.persistence.Table;


@Entity
@Table(name = "ACCOUNTBME")
public class Account implements Serializable {

 @Id
 public int accountNumber;
 public int personId;
 public double balance;

 public Account() {
 }

 public int getAccountNumber() {
  return accountNumber;
 }

 public void setAccountNumber(int accountNumber) {
  this.accountNumber = accountNumber;
 }

 public int getPersonId() {
  return personId;
 }

 public void setPersonId(int personId) {
  this.personId = personId;
 }

 public double getBalance() {
  return balance;
 }

 public void setBalance(double balance) {
  this.balance = balance;
 }
}

package sample.jpa;

import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;


@Entity
@Table(name = "PERSONBME")
public class Person implements Serializable {

 @Id
 public int personId;
 public String personName;
 public String address;

 public Person() { }

 public int getPersonId() {
  return personId;
 }

 public void setPersonId(int personId) {
  this.personId = personId;
 }

 public String getPersonName() {
  return personName;
 }

 public void setPersonName(String personName) {
  this.personName = personName;
 }

 public String getAddress() {
  return address;
 }

 public void setAddress(String address) {
  System.out.println("Address="+address);
  this.address = address;
 }

}

package sample.jpa;

import javax.annotation.PostConstruct;
import javax.ejb.Local;
import javax.ejb.Remove;
import javax.ejb.Stateful;
import javax.ejb.TransactionManagement;
import javax.ejb.TransactionManagementType;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;


@Stateful
@TransactionManagement(TransactionManagementType.CONTAINER)
@Local(AccountInterface.class)
public class AccountBean implements AccountInterface{

 @PersistenceUnit(unitName="AccountUnit")
 private EntityManagerFactory emf;

 private EntityManager em;

 Account account;
 Person person;

 @PostConstruct
 public void init(){
  em = emf.createEntityManager();
 }

 public void initialize(int accountNumber){

  account = em.find(Account.class, accountNumber);

  if(account == null)throw new IllegalStateException
   ("Account number ("+accountNumber+") not found");

  person = em.find(Person.class, account.getPersonId());

  if(person == null)throw new 
   IllegalStateException("Person Id("+account.getPersonId()+") not found. There is a descripancy 
in the database for account number ("+accountNumber+")");
 }

 public String getPersonName(){
  return person.getPersonName();
 }

 public void setPersonName(String personName){
  person.setPersonName(personName);
 }

 public String getAddress(){
  return person.getAddress();
 }

 public void setAddress(String address){
  person.setAddress(address);
 }

 public void updateAllValues(String address, 
                             String personName, 
                             double balance){
  em.joinTransaction();
  setAddress(address);
  setPersonName(personName);
  setBalance(balance);
 }

 public double getBalance(){
  return account.getBalance();
 }

 public void setBalance(double balance){
  account.setBalance(balance);
 }

 public void withdraw(double amount){

  if(amount > getBalance())throw new IllegalStateException ("The amount("+amount+") to be 
withdrawn is more than the available balance("+getBalance()+")");

  em.joinTransaction();
  setBalance(getBalance() - amount);

 }

 public void deposit(double amount){
  em.joinTransaction();
  setBalance(getBalance() + amount);
 }

 @Remove
 public void destroy(){
  em.close();
 }
}