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 Hibernate > Criteria Queries > Entity Map2

Entity Map2 

The following example shows creating an entity map from a projection list with aggregate values. Refer first example for the configuration and mapping.

File Name  :  
com/bethecoder/tutorials/hibernate/basic/criteria/CriteriaMapTest2.java 
Author  :  Sudhakar KV
Email  :  kvenkatasudhakar@gmail.com
   
package com.bethecoder.tutorials.hibernate.basic.criteria;

import java.util.Map;

import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Property;
import org.hibernate.transform.Transformers;

import com.bethecoder.tutorials.hibernate.basic.Company;
import com.bethecoder.tutorials.hibernate.basic.util.HibernateUtil;

public class CriteriaMapTest2 {

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

    Session session = HibernateUtil.getSessionFactory().openSession();
    session.beginTransaction();
    
    Criteria criteria = session.createCriteria(Company.class);
    criteria.setProjection(Projections.projectionList()
            .addProperty.forName("name").count().as("company_count"))
            .addProperty.forName("employeeCount").avg().as("avg_employees") )
            .addProperty.forName("projectCount").max().as("max_project_count") )
      );
    criteria.setResultTransformer(Transformers.ALIAS_TO_ENTITY_MAP);
    
    Map stats = (Mapcriteria.uniqueResult();
    System.out.println(stats);
    
    session.getTransaction().commit();
    session.close();  
  }
  
}
   

It gives the following output,
max_project_count=8478, avg_employees=40294.4, company_count=10}


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