Hibernate example source code file (FlushTest.java)

This example Hibernate source code file (FlushTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

cat, collection, collection, decorate, decorate, dog, entitymanager, entitymanager, list, pet, pet, set, toonses, util, winnie

The Hibernate FlushTest.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.ejb.test.emops;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.persistence.EntityManager;
import javax.persistence.Query;

import org.hibernate.ejb.test.BaseEntityManagerFunctionalTestCase;

import org.junit.Assert;
import org.junit.Test;

import org.hibernate.testing.TestForIssue;

/**
 * @author Emmanuel Bernard
 */
public class FlushTest extends BaseEntityManagerFunctionalTestCase {
	private static Set<String> names = namesSet();
	private static Set<String> namesSet() {
		HashSet<String> names = new HashSet();
		names.add("Toonses");
		names.add("Sox");
		names.add("Winnie");
		names.add("Junior");
		return names;
	}

	@Override
	public Class[] getAnnotatedClasses() {
		return new Class[] {
				Pet.class,
				Dog.class,
				Cat.class,
				Decorate.class
		};
	}

	@Test
	@TestForIssue( jiraKey = "EJBTHREE-722" )
	public void testFlushOnDetached() throws Exception {
		EntityManager manager = getOrCreateEntityManager( );

		manager.getTransaction().begin();
		Pet p1 = createCat("Toonses", 15.0, 9, manager);
		manager.flush();
		manager.clear();

		Pet p2 = createCat("Sox", 10.0, 5, manager);
		manager.flush();
		manager.clear();

		Pet p3 = createDog("Winnie", 70.0, 5, manager);
		manager.flush();
		manager.clear();

		Pet p4 = createDog("Junior", 11.0, 1, manager);
		manager.flush();
		manager.clear();

		Decorate d1 = createDecorate("Test", p1, manager);
		manager.flush();
		manager.clear();

		Decorate d2 = createDecorate("Test2", p2, manager);
		manager.flush();
		manager.clear();

		List l = findByWeight(14.0, manager);
		manager.flush();
		manager.clear();
		for (Object o : l) {
			Assert.assertTrue( names.contains( ((Pet) o).getName() ) );
		}

		Collection<Decorate> founds = getDecorate(manager);
		manager.flush();
		manager.clear();
		for (Decorate value : founds) {
			Assert.assertTrue( names.contains( value.getPet().getName() ) );
		}
		manager.getTransaction().rollback();
		
		manager.close();
	}

	private Dog createDog(String name, double weight, int bones, EntityManager manager) {
		Dog dog = new Dog();
		dog.setName(name);
		dog.setWeight(weight);
		dog.setNumBones(bones);
		manager.persist(dog);
		return dog;
	}

	private Cat createCat(String name, double weight, int lives, EntityManager manager) {
		Cat cat = new Cat();
		cat.setName(name);
		cat.setWeight(weight);
		cat.setLives(lives);
		manager.persist(cat);
		return cat;
	}

	private List findByWeight(double weight, EntityManager manager) {
		return manager.createQuery(
				"select p from Pet p where p.weight < :weight").setParameter(
				"weight", weight).getResultList();
	}

	private Decorate createDecorate(String name, Pet pet, EntityManager manager) {
		Decorate dec = new Decorate();
		dec.setName(name);
		dec.setPet(pet);
		manager.persist(dec);
		return dec;
	}

	private Collection<Decorate> getDecorate(EntityManager manager) {
		Collection<Decorate> founds = new ArrayList();
		Query query = manager.createQuery("SELECT o FROM Decorate o");
		List list = query.getResultList();
		for (Object obj : list) {
			if (obj instanceof Decorate) {
				Decorate decorate = (Decorate) obj;
				founds.add( decorate );
				decorate.getPet().getName(); //load
			}
		}
		return founds;
	}

}