BE THE CODER > Hibernate > Criteria Queries

The following example shows how to use Hibernate Detached Criteria. It returns companies having maximum number of projects. Refer first example for the configuration and mapping.

File Name :	com/bethecoder/tutorials/hibernate/basic/criteria/DetachedCriteriaMaxTest.java
Author :	Sudhakar KV
Email :	[email protected]


package com.bethecoder.tutorials.hibernate.basic.criteria;



import java.util.List;



import org.hibernate.Criteria;

import org.hibernate.Session;

import org.hibernate.criterion.DetachedCriteria;

import org.hibernate.criterion.Projections;

import org.hibernate.criterion.Property;



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

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



public class DetachedCriteriaMaxTest {



  /**

   * @param args

   */

  public static void main(String[] args) {



    Session session = HibernateUtil.getSessionFactory().openSession();

    session.beginTransaction();

    

    DetachedCriteria maxProjCnt = 

      DetachedCriteria.forClass(Company.class)

        .setProjection(Projections.max("projectCount"));

    

    Criteria criteria = session.createCriteria(Company.class);

    criteria.add(Property.forName("projectCount").eq(maxProjCnt));

    

    List<Company> companies = criteria.list();    

    System.out.println("Selected row count : " + companies.size());

    

    for (Company company : companies) {

      System.out.println(company);

    }

    

    session.getTransaction().commit();

    session.close();

  }

  

}

Detached Criteria Max