Annotations exception

[Swaroop Kunduru]

Class: User_Details.java

package com.hibernate.domain;

import java.util.HashSet;
import java.util.Set;

import javax.persistence.Column;
import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

@Entity
@Table (name="USER_DETAILS")
@SequenceGenerator(name="UsrDtls_seq", sequenceName="UsrDtls_seq", initialValue=1, allocationSize=1)
public class User_Details {
	
	private int userID;
	private String fName;
	private String lName;
	
	@ElementCollection
	private Set<Address> adresses = new HashSet<Address>();

	@Id	@GeneratedValue (strategy=GenerationType.AUTO)
	public int getUserID() {
		return userID;
	}

	public void setUserID(int userID) {
		this.userID = userID;
	}
	@Column(name="FirstName" , length=25)
	public String getfName() {
		return fName;
	}

	public void setfName(String fName) {
		this.fName = fName;
	}
	@Column(name="LastName" , length=25)
	public String getlName() {
		return lName;
	}

	public void setlName(String lName) {
		this.lName = lName;
	}

	public Set<Address> getAdresses() {
		return adresses;
	}

	public void setAdresses(Set<Address> adresses) {
		this.adresses = adresses;
	}
	
}

Class: Address.java

package com.hibernate.domain;

import javax.persistence.Column;
import javax.persistence.Embeddable;

@Embeddable
public class Address {

	@Column(name="Address_Line" , length=100)
	private String addrLineOne;
	@Column(name="City" , length=40)
	private String city;
	@Column(name="State" , length=2)
	private String state;
	@Column(name="Zip" , length=5)
	private String zip;
	
	
	
	
	public String getAddrLineOne() {
		return addrLineOne;
	}
	public void setAddrLineOne(String addrLineOne) {
		this.addrLineOne = addrLineOne;
	}
	
	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;
	}
	
	
	
}

Class : HibernateUtil.java

package com.hibernate.util;
 
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
 
public class HibernateUtil {
 
	private static final SessionFactory sessionFactory = buildSessionFactory();
 
	private static SessionFactory buildSessionFactory() {
		try {
			// Create the SessionFactory from hibernate.cfg.xml
			return new Configuration().configure().buildSessionFactory();
		} catch (Throwable ex) {
			// Make sure you log the exception, as it might be swallowed
			System.err.println("Initial SessionFactory creation failed." + ex);
			throw new ExceptionInInitializerError(ex);
		}
	}
 
	public static SessionFactory getSessionFactory() {
		return sessionFactory;
	}
 
	public static void shutdown() {
		// Close caches and connection pools
		getSessionFactory().close();
	}
 
}

Class: Test.java

package com.hibernate.test;

import org.hibernate.Session;

import com.hibernate.domain.Address;
import com.hibernate.domain.User_Details;
import com.hibernate.util.HibernateUtil;

public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		Session session = HibernateUtil.getSessionFactory().openSession();
		
		User_Details user = new User_Details();
		Address address = new Address();
		
		address.setAddrLineOne("100 Liones Ln");
		address.setCity("Lewisville");
		address.setState("TX");
		address.setZip("75056");
		
		Address address2 = new Address();
		address2.setAddrLineOne("3801 W Spring Creek pkwy #713");
		address2.setCity("Plano");
		address2.setState("TX");
		address2.setZip("75023");
		
		
		user.setfName("Swaroop");
		user.setlName("Kunduru");
		user.getAdresses().add(address);
		user.getAdresses().add(address2);
		
		session.beginTransaction();
		session.save(user);
		session.getTransaction().commit();
		session.close();
		
		
		user = null;
		address = null;
		

	}

}

Config: hibernate.cfg.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
	<session-factory>
	 	<property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
		<property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/HibernateLearn</property>
		<property name="hibernate.max_fetch_depth">3</property> 
		<property name="hibernate.connection.username">postgres</property>
		<property name="hibernate.connection.password">warangal</property>
		<property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
		<property name="show_sql">true</property>
		<property name="format_sql">true</property>
		<property name="hbm2ddl.auto">create</property> 
  		<mapping class="com.hibernate.domain.User_Details" />
	</session-factory>
</hibernate-configuration>

Error I am getting:

log4j:WARN No appenders could be found for logger (org.jboss.logging).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Initial SessionFactory creation failed.org.hibernate.MappingException: Could not determine type for: java.util.Set, at table: USER_DETAILS, for columns: [org.hibernate.mapping.Column(adresses)]
Exception in thread "main" java.lang.ExceptionInInitializerError
	at com.hibernate.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:17)
	at com.hibernate.util.HibernateUtil.<clinit>(HibernateUtil.java:8)
	at com.hibernate.test.Test.main(Test.java:16)
Caused by: org.hibernate.MappingException: Could not determine type for: java.util.Set, at table: USER_DETAILS, for columns: [org.hibernate.mapping.Column(adresses)]
	at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:304)
	at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:288)
	at org.hibernate.mapping.Property.isValid(Property.java:216)
	at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:467)
	at org.hibernate.mapping.RootClass.validate(RootClass.java:268)
	at org.hibernate.cfg.Configuration.validate(Configuration.java:1287)
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1729)
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1775)
	at com.hibernate.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:13)
	... 2 more