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Is it ok to use "<generator class="org.hibernate.id.enhanced.SequenceStyleGenerator">" instead of<generator class="sequence">

Hi Guys i was getting java.sql.SQLSyntaxErrorException: ORA-02289: sequence does not exist exception while trying to migrate from hibernate3 to hibernate5 i changed my mapping from "generator class="sequence"" to
"generator class="org.hibernate.id.enhanced.SequenceStyleGenerator"
now its working fine.please confirm it that its a legitimate solution.
Thanks
employee hbm
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="Employee" table="EMPLOYEE" schema="RPTUSER">
<id name="id" type="int" column="id">
<generator class="org.hibernate.id.enhanced.SequenceStyleGenerator">
<param name="optimizer">none</param>
<param name="sequence_name">testemployee_seq</param>
</generator>
</id>
<property name="firstName" column="first_name" type="string" not-null="true"/>
<property name="lastName" column="last_name" type="string" />
<property name="salary" column="salary" type="int" />
</class>
</hibernate-mapping>
Hibernate-cfg.xml
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.url">
URL</property>
<property name="hibernate.connection.username">USERNAME</property>
<property name="hibernate.connection.password">PASSWORD</property><!-- 3des10qf7 -->
<property name="hibernate.connection.pool_size">1</property>
<property name="show_sql">true</property>
<property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>
<property name="hibernate.hbm2ddl.auto">validate</property>
<mapping resource="Employee.hbm.xml" />
</session-factory>
</hibernate-configuration>
manage employee class
import java.util.Iterator;
import java.util.List;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
public class ManageEmployee {
private static SessionFactory factory;
public static void main(String[] args) {
try{
factory = new Configuration().configure().buildSessionFactory();
}catch (Throwable ex) {
System.err.println("Failed to create sessionFactory object." + ex);
throw new ExceptionInInitializerError(ex);
}
ManageEmployee ME = new ManageEmployee();
/* Add few employee records in database */
Integer empID1 = ME.addEmployee("Zara", "Ali", 1000);
Integer empID2 = ME.addEmployee("Daisy", "Das", 5000);
Integer empID3 = ME.addEmployee("John", "Paul", 10000);
/* List down all the employees */
ME.listEmployees();
/* Update employee's records */
ME.updateEmployee(empID1, 5000);
/* Delete an employee from the database */
ME.deleteEmployee(empID2);
/* List down new list of the employees */
ME.listEmployees();
}
/* Method to CREATE an employee in the database */
public Integer addEmployee(String fname, String lname, int salary){
Session session = factory.openSession();
Transaction tx = null;
Integer employeeID = null;
try{
tx = session.beginTransaction();
Employee employee = new Employee(fname, lname, salary);
employeeID = (Integer) session.save(employee);
tx.commit();
}catch (HibernateException e) {
if (tx!=null) tx.rollback();
e.printStackTrace();
}finally {
session.close();
}
return employeeID;
}
/* Method to READ all the employees */
public void listEmployees( ){
Session session = factory.openSession();
Transaction tx = null;
try{
tx = session.beginTransaction();
List employees = session.createQuery("FROM Employee").list();
for (Iterator iterator =
employees.iterator(); iterator.hasNext();){
Employee employee = (Employee) iterator.next();
System.out.print("First Name: " + employee.getFirstName());
System.out.print(" Last Name: " + employee.getLastName());
System.out.println(" Salary: " + employee.getSalary());
}
tx.commit();
}catch (HibernateException e) {
if (tx!=null) tx.rollback();
e.printStackTrace();
}finally {
session.close();
}
}
/* Method to UPDATE salary for an employee */
public void updateEmployee(Integer EmployeeID, int salary ){
Session session = factory.openSession();
Transaction tx = null;
try{
tx = session.beginTransaction();
Employee employee =
(Employee)session.get(Employee.class, EmployeeID);
employee.setSalary( salary );
session.update(employee);
tx.commit();
}catch (HibernateException e) {
if (tx!=null) tx.rollback();
e.printStackTrace();
}finally {
session.close();
}
}
/* Method to DELETE an employee from the records */
public void deleteEmployee(Integer EmployeeID){
Session session = factory.openSession();
Transaction tx = null;
try{
tx = session.beginTransaction();
Employee employee =
(Employee)session.get(Employee.class, EmployeeID);
session.delete(employee);
tx.commit();
}catch (HibernateException e) {
if (tx!=null) tx.rollback();
e.printStackTrace();
}finally {
session.close();
}
}
}
employee .java
public class Employee {
private int id;
private String firstName;
private String lastName;
private int salary;
public Employee() {}
public Employee(String fname, String lname, int salary) {
this.firstName = fname;
this.lastName = lname;
this.salary = salary;
}
public int getId() {
return id;
}
public void setId( int id ) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName( String first_name ) {
this.firstName = first_name;
}
public String getLastName() {
return lastName;
}
public void setLastName( String last_name ) {
this.lastName = last_name;
}
public int getSalary() {
return salary;
}
public void setSalary( int salary ) {
this.salary = salary;
}
}

First of all , I have to thank you for reminding me .
Use <param name="sequence_name">testemployee_seq</param>
Get to the point , maybe you should do like this .
<id name="id">
<generator class="sequence">
<param name="sequence_name">seq_admins</param>
</generator>
</id>

upgrading from Hiberante 3 to Hibernate 4 can't persist data to datatbase

OK, we have an Hibernate 3 application that I am trying to update to hibernate 4. I can retrieve the data without any problem, but cannot add or update the database. I don't get any error messages, the transaction seems to work, but nothing gets changed in the database. Some help would be greatly appreciated.
Here's the config file hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.show_sql">false</property>
<property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.connection.datasource">jdbc/misc</property>
<property name="hibernate.jndi.url">iiop://127.0.0.1:3700</property>
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>
<property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.SunONETransactionManagerLookup</property>
<mapping resource="sponsor.hbm.xml"/>
<mapping resource="portfolio.hbm.xml"/>
<mapping resource="clientID.hbm.xml"/>
<mapping resource="legacyID.hbm.xml"/>
<mapping resource="badClient.hbm.xml"/>
<mapping resource="language.hbm.xml"/>
</session-factory>
</hibernate-configuration>
Here's a sam;ole map file of the table I am currently working with sponsor.hbm.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.lingosys.hibernate.Sponsor" table="sponsor">
<id name="companyID" type="integer">
<generator class="assigned"/>
</id>
<property name="companyName" type="string"/>
<property name="sponsorID" type="integer"/>
<property name="sponsorName" type="string"/>
<property name="status" type="string"/>
</class>
</hibernate-mapping>
Here's the class for creating the session factory HibenateUtil.java:
package com.lingosys.hibernate;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
/**
* Hibernate Utility class with a convenient method to get Session Factory object.
*
* #author mphoenix
*/
public class HibernateUtil {
private static final SessionFactory sessionFactory;
static {
try {
// Create the SessionFactory from standard (hibernate.cfg.xml)
// config file.
Configuration configuration = new Configuration();
configuration.configure("hibernate.cfg.xml");
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(
configuration.getProperties()).build();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
} catch (Throwable ex) {
// Log the exception.
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
Here's the dao file SponsorDAO.java:
package com.lingosys.hibernate;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
/**
*
* #author mphoenix
*/
public class SponsorDAO {
private Session session = null;
public SponsorDAO() {
}
private void startOperation() {
session = HibernateUtil.getSessionFactory().openSession();
}
public void create(Sponsor sponsor) {
startOperation();
session.saveOrUpdate("Sponsor", sponsor);
session.close();
}
public void update(Sponsor sponsor) {
startOperation();
session.update("Sponsor", sponsor);
session.close();
}
public Sponsor findSponsor(int id) {
startOperation();
Sponsor sponsor = (Sponsor) session.get(Sponsor.class, new Integer(id));
session.close();
return sponsor;
}
public List <Sponsor> findAllSponsors() {
List <Sponsor> sponsors = null;
startOperation();
Query query = session.createQuery("from Sponsor");
sponsors = query.list();
session.close();
return sponsors;
}
public void delete(Sponsor sponsor) {
startOperation();
session.delete(sponsor);
session.close();
}
}
Here's the create transaction code:
UserTransaction tx = null;
try {
tx = (UserTransaction)new InitialContext()
.lookup("java:comp/UserTransaction");
tx.begin();
dao.create(sponsor);
tx.commit();
} catch (HibernateException ex) {
try {
tx.rollback();
} catch (Exception ex2) {
facesCtx.addMessage(null, new FacesMessage("Error on rollback.",
ex2.toString()));
}
facesCtx.addMessage(null, new FacesMessage("Hibernate Error.",
ex.toString()));
return null;
} catch (Exception ex) {
facesCtx.addMessage(null, new FacesMessage("Non-hibernate Error.",
ex.toString()));
return null;
}
Here's a retrieval transaction:
try {
tx = (UserTransaction)new InitialContext()
.lookup("java:comp/UserTransaction");
tx.begin();
setSponsorItems(new ArrayList<Sponsor>());
List<Sponsor> sponsors = dao.findAllSponsors();
for (Sponsor aSponsor : sponsors) {
if (companyItemsMap.get(aSponsor.getCompanyID()) != null) {
getSponsorItems().add(aSponsor);
}
}
tx.commit();
} catch (HibernateException ex) {
try {
tx.rollback();
} catch (Exception ex2) {
facesCtx.addMessage(null, new FacesMessage(ex2.toString()));
}
facesCtx.addMessage(null, new FacesMessage(ex.toString()));
return false;
} catch (Exception ex) {
facesCtx.addMessage(null, new FacesMessage(ex.toString()));
return false;
}
And finally the object being mapped to Sponsor.java
package com.lingosys.hibernate;
import java.io.Serializable;
/**
*
* #author mphoenix
*/
public class Sponsor implements Serializable {
private int companyID;
private String companyName;
private int sponsorID;
private String sponsorName;
private String status;
public Sponsor() {
}
public int getCompanyID() {
return companyID;
}
public void setCompanyID(int companyID) {
this.companyID = companyID;
}
public String getCompanyName() {
return companyName;
}
public void setCompanyName(String companyName) {
this.companyName = companyName;
}
public int getSponsorID() {
return sponsorID;
}
public void setSponsorID(int sponsorID) {
this.sponsorID = sponsorID;
}
public String getSponsorName() {
return sponsorName;
}
public void setSponsorName(String sponsorName) {
this.sponsorName = sponsorName;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
#Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Sponsor other = (Sponsor) obj;
if (this.companyID != other.companyID) {
return false;
}
return true;
}
#Override
public int hashCode() {
int hash = 5;
hash = 97 * hash + this.companyID;
return hash;
}
//DEBUG CASPERW
#Override
public String toString() {
return "CompanyID: "+companyID+" CompanyName: "+companyName+" SponsorID: "+sponsorID+" SponsorName: "+sponsorName+"\n";
}
}

Hibernate SQLGrammarException: could not prepare statement

I have simple project with one class and a corresponding table in the database (MySQL). It works fine if put the hbm2ddl.auto set create in the hibernate configuration file. But, if I take it out. The code throws the following exception:
ERROR: Table "STUDENT" not found; SQL statement:
into student (fname, lname, entrance) values (?, ?, ?) [42102-185]
org.hibernate.exception.SQLGrammarException: could not prepare statement
I have already created the table in database but I don't know why hibernate cannot find the table. I am not sure how the connection to the database works.
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration SYSTEM
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect"> org.hibernate.dialect.MySQLDialect </property>
<property name="hibernate.CONNECTION.driver_class"> com.mysql.jdbc.Driver </property>
<!-- Assume test is the database name -->
<property name="hibernate.CONNECTION.url">
jdbc:mysql://localhost:3306/sample;MVCC=TRUE;DB_CLOSE_DELAY=-1;DATABASE_TO_UPPER=false;SCHEMA=sample
</property>
<property name="hibernate.connection.username"> root </property>
<property name="hibernate.connection.password"> **** </property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- -->
<property name="hbm2ddl.auto">create</property>
<!-- List of XML mapping files -->
<!-- -->
<mapping resource="Student.hbm.xml" />
<!-- <mapping class="ourPackage.Student" /> -->
</session-factory>
</hibernate-configuration>
Student Class:
#Entity
#Table(name="student")
public class Student implements Serializable{
public Student(){
}
public Student(int id, String fName, String lName, String ent){
this.id = id;
this.fname = fName;
this.lname = lName;
this.entrance = ent;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getFname() {
return fname;
}
public void setFname(String fname) {
this.fname = fname;
}
public String getLname() {
return lname;
}
public void setLname(String lname) {
this.lname = lname;
}
public String getEntrance() {
return entrance;
}
public void setEntrance(String entrance) {
this.entrance = entrance;
}
#Id
#GeneratedValue
private int id;
private String fname;
private String lname;
private String entrance;
}
Student hibernate config
<hibernate-mapping>
<class name="ourPackage.Student" table="student">
<meta attribute="class-description">
This class contains the employee detail.
</meta>
<id name="id" type="int" column="id">
<generator class="native"/>
</id>
<property name="fname" column="fname" type="string"/>
<property name="lname" column="lname" type="string"/>
<property name="entrance" column="entrance" type="string"/>
</class>
</hibernate-mapping>
Main class
public class StudentDB {
private static SessionFactory factory;
private static ServiceRegistry serviceRegistry;
#SuppressWarnings("deprecation")
public static void main(String[] args) {
try {
// factory = new Configuration().configure().buildSessionFactory();
createSessionFactory();
} catch (Throwable ex) {
System.err.println("Failed to create sessionFactory object." + ex);
throw new ExceptionInInitializerError(ex);
}
StudentDB ME = new StudentDB();
Integer empID1 = ME.addStudent("Alex", "Jason", "2005");
ME.listStudent();
factory.close();
}
public void listStudent() {
Session session = factory.openSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
Query temp = session.createQuery("from Student");
List students = temp.list();
for (Iterator iterator = students.iterator(); iterator.hasNext();) {
Student student = (Student) iterator.next();
System.out.print("First Name: " + student.getFname());
System.out.print(" Last Name: " + student.getLname());
System.out.println(" entrance: " + student.getEntrance());
}
tx.commit();
} catch (HibernateException e) {
if (tx != null)
tx.rollback();
e.printStackTrace();
} finally {
session.close();
}
}
public static SessionFactory createSessionFactory() {
Configuration configuration = new Configuration();
configuration.configure();
serviceRegistry = new ServiceRegistryBuilder().applySettings(
configuration.getProperties()).buildServiceRegistry();
factory = configuration.buildSessionFactory(serviceRegistry);
return factory;
}
}

hibernate doesn't see a setter

I am new to hibernate and I have stupid problem. My files:
hibernate.cfg.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration SYSTEM "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">
org.hibernate.dialect.PostgreSQLDialect
</property>
<property name="hibernate.connection.driver_class">
org.postgresql.Driver
</property>
<!-- Assume test is the database name -->
<property name="hibernate.connection.url">
jdbc:postgresql://localhost/booktown
</property>
<property name="hibernate.connection.username">
mirek
</property>
<mapping resource="Books.hbm.xml"/>
</session-factory>
</hibernate-configuration>
books.hbm.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="Books" table="books">
<meta attribute="Książki w booktown">
This class contains the employee detail.
</meta>
<id name="id" type="int" column="id">
<generator class="native"/>
</id>
<property name="title" column="title" type="string"/>
<property name="author_id" column="author_id" type="int"/>
<property name="subject_id" column="subject_id" type="int"/>
</class>
</hibernate-mapping>
Books.java
public class Books
{
private int id;
private String title;
private int author_id;
private int subject_id;
public Books(String title, int author_id, int subject_id)
{
this.title = title;
this.author_id = author_id;
this.subject_id = subject_id;
}
public void setId(int id)
{
this.id = id;
}
public void setTitle(String title)
{
this.title = title;
}
public void setAuthorId(int author_id)
{
this.author_id = author_id;
}
public void setSubjectId(int subject_id)
{
this.subject_id = subject_id;
}
public int getId()
{
return id;
}
public String getTitle()
{
return title;
}
public int getAuthorId()
{
return author_id;
}
public int getSubjectId()
{
return subject_id;
}
}
and Booktown.java
import java.util.Iterator;
import java.util.List;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
public class Booktown
{
private static SessionFactory factory;
private static ServiceRegistry serviceRegistry;
public static void main(String[] args)
{
try
{
//private static SessionFactory configureSessionFactory() throws HibernateException {
Configuration configuration = new Configuration();
configuration.configure();
serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
factory = configuration.buildSessionFactory(serviceRegistry);
//return factory;
//factory = new Configuration().configure().buildSessionFactory();
}
catch (Throwable ex)
{
System.err.println("Failed to create sessionFactory object." + ex.toString());
throw new ExceptionInInitializerError(ex);
}
Booktown BT = new Booktown();
/* Add few employee records in database */
Integer bID1 = BT.addBook(10, "Jakiś napis", 10, 30);
Integer bID2 = BT.addBook(20, "Jakiś inny napis", 10, 50);
//Integer bID3 = BT.addBook(30, "John", 10000, 14);
/* List down all the employees */
BT.listBooks();
/* Update employee's records */
BT.updateBook(bID1, 5000);
/* Delete an employee from the database */
BT.deleteBook(bID2);
/* List down new list of the employees */
BT.listBooks();
}
/* Method to CREATE a book in the database */
public Integer addBook(int bid, String fname, int lname, int salary)
{
Session session = factory.openSession();
Transaction tx = null;
Integer bID = null;
try
{
tx = session.beginTransaction();
Books book = new Books(fname, lname, salary);
bid = (Integer) session.save(book);
tx.commit();
}
catch (HibernateException e)
{
if (tx != null)
tx.rollback();
e.printStackTrace();
}
finally
{
session.close();
}
return bID;
}
/* Method to READ all the books */
public void listBooks()
{
Session session = factory.openSession();
Transaction tx = null;
try
{
tx = session.beginTransaction();
List<Books> books = session.createQuery("FROM books").list();
for (Iterator<Books> iterator = books.iterator(); iterator.hasNext();)
{
Books book = (Books) iterator.next();
System.out.print("First Name: " + book.getTitle());
System.out.print(" Last Name: " + book.getAuthorId());
System.out.println(" Salary: " + book.getSubjectId());
}
tx.commit();
}
catch (HibernateException e)
{
if (tx != null)
tx.rollback();
e.printStackTrace();
}
finally
{
session.close();
}
}
/* Method to UPDATE author for a book */
public void updateBook(Integer bID, int auth)
{
Session session = factory.openSession();
Transaction tx = null;
try
{
tx = session.beginTransaction();
Books book = (Books) session.get(Books.class, bID);
book.setAuthorId(auth);
session.update(book);
tx.commit();
}
catch (HibernateException e)
{
if (tx != null)
tx.rollback();
e.printStackTrace();
}
finally
{
session.close();
}
}
/* Method to DELETE a book from the records */
public void deleteBook(Integer bID)
{
Session session = factory.openSession();
Transaction tx = null;
try
{
tx = session.beginTransaction();
Books book = (Books) session.get(Books.class, bID);
session.delete(book);
tx.commit();
}
catch (HibernateException e)
{
if (tx != null)
tx.rollback();
e.printStackTrace();
}
finally
{
session.close();
}
}
}
Code is compiling but at run I get:
> paź 15, 2013 8:44:38 PM org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>
INFO: HHH000397: Using ASTQueryTranslatorFactory
Failed to create sessionFactory object.org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister
Exception in thread "main" java.lang.ExceptionInInitializerError
at Booktown.main(Booktown.java:34)
Caused by: org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister
at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:185)
at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:135)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:385)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1790)
at Booktown.main(Booktown.java:25)
Caused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]
at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:138)
at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:188)
at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:341) at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:507)
at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:146)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:163)
... 4 more
Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:135)
... 13 more
Caused by: org.hibernate.PropertyNotFoundException: Could not find a getter for author_id in class Books
at org.hibernate.property.BasicPropertyAccessor.createGetter(BasicPropertyAccessor.java:316)
at org.hibernate.property.BasicPropertyAccessor.getGetter(BasicPropertyAccessor.java:310)
at org.hibernate.mapping.Property.getGetter(Property.java:321)
at org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertyGetter(PojoEntityTuplizer.java:444)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:200)
at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:82)
... 18 more
I found similar problem there was no setter. In my case system says that there is no getter for author_id but it is at line 45 in Books.java.
Could sb tells me what is wrong? Maybe there is an other cause which I don't see...

public int getAuthorId()
{
return author_id;
}
should be (observe, author_id)
public int getAuthor_id()
{
return author_id;
}
OR update XML as #Boris the spider commented.

As far as I know Hibernate requires a no-arg constructor which your Books class does seem to have. So even if you get the save part working I think your code will fail when you attempt to load.
Thus, create a constructor:
public Books(){
}
Why does Hibernate require no argument constructor?
Also, as pointed out previously ditch the XML and use JPA annotations. In line with standard Java conventions rename Books to Book and remove the _ from your variable names.
Alan

I had once this problem and I fix it like that:
You should Generate Constructor, Getters and Setters in NetBeans IDE ( I'm working with IDE is netbeans) so you have to press shortcut ALT+Insert (CTLRL+I on Mac). After invoking the shortcut, all possible generators are offered.

Could not parse configuration: /hibernate.cfg.xml in my application

I am trying to do a CRUD operation in hibernate. i have written the following steps for my application.
hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="hibernate.connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="hibernate.connection.url">
jdbc:mysql://localhost:3306/hibernate
</property>
<property name="hibernate.connection.username">
root
</property>
<property name="hibernate.connection.password">
root
</property>
<property name="connection.pool_size">1</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">create-drop</property>
<mapping resource="Employee.hbm.xml" />
</session-factory>
</hibernate-configuration>
This is my Employee.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.bullraider.crud.Employee" table="emp1000">
<meta attribute="class-description"> This class contains employee details. </meta>
<id name="empno" type="long" column="empno">
<generator class="native" />
</id>
<property name="ename" type="string" column="ename" not-null="true" />
<property name="job" type="string" column="job" not-null="true" />
<property name="sal" type="integer" column="sal" not-null="true" />
<property name="deptno" type="integer" column="deptno"
not-null="true" />
</class>
</hibernate-mapping>
This is my persistance class
public class Employee implements Serializable{
private long empno;
private String ename;
private int sal;
private String job;
private int deptno ;
public long getEmpno() {
return empno;
}
public void setEmpno(long empno) {
this.empno = empno;
}
public String getEname() {
return ename;
}
public void setEname(String ename) {
this.ename = ename;
}
public int getSal() {
return sal;
}
public void setSal(int sal) {
this.sal = sal;
}
public String getJob() {
return job;
}
public void setJob(String job) {
this.job = job;
}
public int getDeptno() {
return deptno;
}
public void setDeptno(int deptno) {
this.deptno = deptno;
}
}
This is my util class
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtil {
private static final SessionFactory sessionFactory;
static {
try {
sessionFactory = new Configuration().configure()
.buildSessionFactory();
} catch (Throwable ex) {
System.err.println("SessionFactory creation failed" + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
This is driver Class
import java.util.Iterator;
import java.util.List;
import com.bullraider.crud.util.*;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
public class Main {
public static void main(String[] args) {
Main m = new Main();
m.saveEmployee("Alex", "MANAGER", 50000, 10);
m.saveEmployee("Mike", "CLERK", 1000, 30);
m.saveEmployee("Tom", "SALESMAN", 2000, 10);
// m.retriveEmployee();
// m.deleteEmployee();
// m.updateEmployee();
}
public void saveEmployee(String ename, String job, int sal, int deptno) {
Session session = HibernateUtil.getSessionFactory().openSession();
Transaction transaction = null;
try {
transaction = session.beginTransaction();
Employee emp = new Employee();
emp.setEname(ename);
emp.setJob(job);
emp.setSal(sal);
emp.setDeptno(deptno);
session.save(emp);
transaction.commit();
System.out.println("Records inserted sucessessfully");
} catch (HibernateException e) {
transaction.rollback();
e.printStackTrace();
} finally {
session.close();
}
}
public void retriveEmployee() {
Session session = HibernateUtil.getSessionFactory().openSession();
Transaction transaction = null;
try {
transaction = session.beginTransaction();
List employee = session.createQuery("from emp1000").list();
for (Iterator iterator = employee.iterator(); iterator.hasNext();) {
Employee employee1 = (Employee) iterator.next();
System.out.println(employee1.getEmpno() + " "
+ employee1.getEname() + " " + employee1.getJob()
+ " " + employee1.getSal() + " "
+ employee1.getDeptno());
}
transaction.commit();
} catch (HibernateException e) {
transaction.rollback();
e.printStackTrace();
} finally {
session.close();
}
}
public void deleteEmployee() {
Session session = HibernateUtil.getSessionFactory().openSession();
Transaction transaction = null;
try {
transaction = session.beginTransaction();
String queryString = "from emp1000 where deptno = :deptno";
Query query = session.createQuery(queryString);
query.setInteger("deptno", 30);
Employee employee = (Employee) query.uniqueResult();
session.delete(employee);
System.out.println("One employee is deleted!");
// Another way to write it
/*
* String hql = "delete from Employee insurance where deptno = 30";
* Query query1 = session.createQuery(hql); int row =
* query1.executeUpdate(); if (row == 0){
* System.out.println("Doesn't deleted any row!"); } else{
* System.out.println("Deleted Row: " + row); }
*/
System.out.println("One employee is deleted!");
} catch (HibernateException e) {
transaction.rollback();
e.printStackTrace();
} finally {
session.close();
}
}
public void updateEmployee() {
Session session = HibernateUtil.getSessionFactory().openSession();
Transaction transaction = null;
try {
transaction = session.beginTransaction();
String queryString = "from emp1000 where sal = :sal";
Query query = session.createQuery(queryString);
query.setInteger("sal", 8000);
Employee employee = (Employee) query.uniqueResult();
employee.setSal(11000);
session.update(employee);
System.out.println("One employee is updated!");
} catch (HibernateException e) {
transaction.rollback();
e.printStackTrace();
} finally {
session.close();
}
}
}