no persistent classes found for query class

[ashwin bala]

Hi.I tried one hibernate example with annotations. I tried to retrieve data from a table. The name of the table is MstEngineDetails. The primary key in the table is EngineCode and also have a column called ID in the same table.But iam using EngineCode as id reference.

I get a warning message as " no persistent classes found for query class: from com.EngineDetails ".Apart from the warning, my list from the data base is zero(println statement).

I will put my code . Please let me if you can find some errors in the code. Thanks in advance.

my bean class:

package com;

import java.io.Serializable;
import javax.persistence.*;


@Entity
@Table(name = "MstEngineDetails")
public class EngineDetails implements Serializable
{
    
    private int id = 0;
    private String engineDescription = null;
    private String engineType = null;
    private int enginePower = 0;
    private String destination= null;
    private String combustionType = null;    
    public void setId(int id)
    {
        this.id = id;
    }
    @Id  
    @GeneratedValue  
    @Column(name = "EngineCode") 
    public int getId()
    {
        return id;
    }   
   
    public void setEngineDescription(String engineDescription)
    {
        this.engineDescription = engineDescription;
    }
    @Column(name = "EngineDescription")
    public String getEngineDescription()
    {
        return engineDescription;
    }
    public void setEngineType(String engineType)
    {
        this.engineType = engineType;
    }
    @Column(name = "EngineType")
    public String getEngineType()
    {
        return engineType;
    }    
    public void setEnginePower(int enginePower)
    {
        this.enginePower = enginePower;
    }
    @Column(name = "EnginePower")
    public int getEnginePower()
    {
        return enginePower;
    }
    public void setDestination(String destination)
    {
        this.destination = destination;
    }
    @Column(name = "Destination")
    public String getDestination()
    {
        return destination;
    }
    public void setCombustionType(String combustionType)
    {
        this.combustionType = combustionType;
    }
    @Column(name = "CombustionType")
    public String getCombustionType()
    {
        return combustionType;
    }
   
}

My DAO:

package com;


import java.math.BigInteger;
import java.util.Iterator;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.CriteriaSpecification;


public class HibernateNativeInsert 
{
  public static void main(String args[]){
  Session sess = null;
  try{  
  sess = HibernateUtil.currentSession();
  Transaction tx = sess.beginTransaction();
  Query query = sess.createQuery("from com.EngineDetails");
  List l= query.list();
  System.out.println("list size "+l.size());
  Iterator il = l.iterator();
  EngineDetails ed=null;
  while(il.hasNext())
  {
    ed =  (EngineDetails)il.next();
    System.out.println("-----------"+ed.getDestination());
  }

   tx.commit();
  }
  catch(Exception e){    
  System.out.println("--------------------"+e.getMessage());
  }
  finally{
  sess.close();
  }
  }   
}

[Bill Gorder]

Is it defined as a mapping class in your hibernate.cfg.xml?

[ashwin bala]

you were right Mr.Bill . I thought if we are using annotations we need not mention it. Thanks for your help.