alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Hibernate example source code file (PaginationTest.java)

This example Hibernate source code file (PaginationTest.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

bigdecimal, datapoint, datapoint, description, description, dialect, math, object, override, rows, session, session, string, string, test, util

The Hibernate PaginationTest.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2009-2011, 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.test.pagination;
import java.math.BigDecimal;
import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.SQLQuery;
import org.hibernate.Session;
import org.hibernate.criterion.Order;

import org.junit.Test;

import org.hibernate.testing.DialectChecks;
import org.hibernate.testing.RequiresDialectFeature;
import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

/**
 * @author Gavin King
 */
public class PaginationTest extends BaseCoreFunctionalTestCase {
	public static final int ROWS = 100;

	@Override
	public String[] getMappings() {
		return new String[] { "pagination/DataPoint.hbm.xml" };
	}

	@Override
	public String getCacheConcurrencyStrategy() {
		return null;
	}

	@Test
	@RequiresDialectFeature(
			value = DialectChecks.SupportLimitCheck.class,
			comment = "Dialect does not support limit"
	)
	public void testLimit() {
		prepareTestData();

		Session session = openSession();
		session.beginTransaction();

		int count;

		count = generateBaseHQLQuery( session )
				.setMaxResults( 5 )
				.list()
				.size();
		assertEquals( 5, count );

		count = generateBaseCriteria( session )
				.setMaxResults( 18 )
				.list()
				.size();
		assertEquals( 18, count );

		count = generateBaseSQLQuery( session )
				.setMaxResults( 13 )
				.list()
				.size();
		assertEquals( 13, count );

		session.getTransaction().commit();
		session.close();

		cleanupTestData();
	}
	@Test
	public void testOffset(){
		prepareTestData();
		Session session = openSession();
		session.beginTransaction();
		List result;

		result = generateBaseHQLQuery( session )
				.setFirstResult( 3 )
				.list();
		result = generateBaseCriteria( session )
				.setFirstResult( 3 )
				.list();
		session.getTransaction().commit();
		session.close();
		cleanupTestData();
	}

	@Test
	@RequiresDialectFeature(
			value = DialectChecks.SupportLimitAndOffsetCheck.class,
			comment = "Dialect does not support limit+offset"
	)
	public void testLimitOffset() {
		prepareTestData();

		Session session = openSession();
		session.beginTransaction();

		List result;

		result = generateBaseHQLQuery( session )
				.setFirstResult( 0 )
				.setMaxResults( 20 )
				.list();
		assertEquals( 20, result.size() );
		assertEquals( 0, ( ( DataPoint ) result.get( 0 ) ).getSequence() );
		assertEquals( 1, ( ( DataPoint ) result.get( 1 ) ).getSequence() );

		result = generateBaseCriteria( session )
				.setFirstResult( 1 )
				.setMaxResults( 20 )
				.list();
		assertEquals( 20, result.size() );
		assertEquals( 1, ( ( DataPoint ) result.get( 0 ) ).getSequence() );
		assertEquals( 2, ( ( DataPoint ) result.get( 1 ) ).getSequence() );

		result = generateBaseCriteria( session )
				.setFirstResult( 99 )
				.setMaxResults( Integer.MAX_VALUE - 200 )
				.list();
		assertEquals( 1, result.size() );
		assertEquals( 99, ( ( DataPoint ) result.get( 0 ) ).getSequence() );

		result = session.createQuery("select distinct description from DataPoint order by description")
				.setFirstResult( 2 )
				.setMaxResults( 3 )
				.list();
		assertEquals( 3, result.size() );
		assertEquals( "Description: 2", result.get(0));
		assertEquals( "Description: 3", result.get(1));
		assertEquals( "Description: 4", result.get(2));

		result = session.createSQLQuery( "select description, xval, yval from DataPoint order by xval, yval" )
				.setFirstResult( 2 )
				.setMaxResults( 5 )
				.list();
		assertEquals( 5, result.size() );
		Object[] row = (Object[]) result.get(0);
		assertTrue( row[0] instanceof String);

		result = session.createSQLQuery( "select * from DataPoint order by xval, yval" )
				.setFirstResult( 2 )
				.setMaxResults( 5 )
				.list();
		assertEquals( 5, result.size() );


		session.getTransaction().commit();
		session.close();

		cleanupTestData();
	}

	private Query generateBaseHQLQuery(Session session) {
		return session.createQuery( "select dp from DataPoint dp order by dp.sequence" );
	}

	private Criteria generateBaseCriteria(Session session) {
		return session.createCriteria( DataPoint.class )
				.addOrder( Order.asc( "sequence" ) );
	}

	private SQLQuery generateBaseSQLQuery(Session session) {
		return session.createSQLQuery( "select id, seqval, xval, yval, description from DataPoint order by seqval" )
				.addEntity( DataPoint.class );
	}

	private void prepareTestData() {
		Session session = openSession();
		session.beginTransaction();
		for ( int i = 0; i < ROWS; i++ ) {
			DataPoint dataPoint = new DataPoint();
			dataPoint.setSequence( i );
			dataPoint.setDescription( "data point #" + i );
			BigDecimal x = new BigDecimal( i * 0.1d ).setScale( 19, BigDecimal.ROUND_DOWN );
			dataPoint.setX( x );
			dataPoint.setY( new BigDecimal( Math.cos( x.doubleValue() ) ).setScale( 19, BigDecimal.ROUND_DOWN ) );
			dataPoint.setDescription("Description: " + i%5);
			session.save( dataPoint );
		}
		session.getTransaction().commit();
		session.close();
	}

	private void cleanupTestData() {
		Session session = openSession();
		session.beginTransaction();
		session.createQuery( "delete DataPoint" ).executeUpdate();
		session.getTransaction().commit();
		session.close();
	}
}

Other Hibernate examples (source code examples)

Here is a short list of links related to this Hibernate PaginationTest.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.