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 Hibernate > Hibernate Query Language > Map Result Transformer

Map Result Transformer 

The following example shows how to use map result transformer. Refer first example for the configuration and mapping.

File Name  :  
com/bethecoder/tutorials/hibernate/basic/tests/HQLTransformAliasMapTest.java 
Author  :  Sudhakar KV
Email  :  kvenkatasudhakar@gmail.com
   
package com.bethecoder.tutorials.hibernate.basic.tests;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.transform.Transformers;
import com.bethecoder.tutorials.hibernate.basic.util.HibernateUtil;

public class HQLTransformAliasMapTest {

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

    Session session = HibernateUtil.getSessionFactory().openSession();
    session.beginTransaction();
    
    String HQL_QUERY = "select comp.id as comp_id, comp.name as comp_name from Company comp";
    Query query = session.createQuery(HQL_QUERY);
    query.setResultTransformer(Transformers.ALIAS_TO_ENTITY_MAP);
    
    List<?> rows = query.list();    
    System.out.println("Selected row count : " + rows.size());
    
    for (Object row : rows) {
      System.out.println(row)//Each row is a map of properties in the query
                   //with key as alias and property as value
    }
    
    session.getTransaction().commit();
    session.close();
  }
  
}
   

It gives the following output,
Selected row count : 10
{comp_id=1, comp_name=PQR}
{comp_id=2, comp_name=ABC}
{comp_id=3, comp_name=MNO}
{comp_id=4, comp_name=IJK}
{comp_id=5, comp_name=ART}
{comp_id=6, comp_name=RNK}
{comp_id=7, comp_name=AOQ}
{comp_id=8, comp_name=BQO}
{comp_id=9, comp_name=CFR}
{comp_id=10, comp_name=CFR}


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