/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.test.pagination;
import java.math.BigDecimal;
import java.util.Collections;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.SQLQuery;
import org.hibernate.Session;
import org.hibernate.criterion.Order;
import org.hibernate.engine.query.spi.HQLQueryPlan;
import org.hibernate.testing.DialectChecks;
import org.hibernate.testing.RequiresDialectFeature;
import org.hibernate.testing.TestForIssue;
import org.hibernate.testing.junit4.BaseNonConfigCoreFunctionalTestCase;
import org.junit.Test;
import static java.lang.String.format;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
/**
* @author Gavin King
*/
public class PaginationTest extends BaseNonConfigCoreFunctionalTestCase {
public static final int NUMBER_OF_TEST_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();
DataPoint firstDataPointHQL = (DataPoint) result.get( 0 );
result = generateBaseCriteria( session )
.setFirstResult( 3 )
.list();
DataPoint firstDataPointCriteria = (DataPoint) result.get( 0 );
assertEquals( "The first entry should be the same in HQL and Criteria", firstDataPointHQL, firstDataPointHQL );
assertEquals( "Wrong first result", 3, firstDataPointCriteria.getSequence() );
session.getTransaction().commit();
session.close();
cleanupTestData();
}
/**
* @author Piotr Findeisen <piotr.findeisen@gmail.com>
*/
@Test
@TestForIssue( jiraKey = "HHH-951" )
@RequiresDialectFeature(
value = DialectChecks.SupportLimitCheck.class,
comment = "Dialect does not support limit"
)
public void testLimitWithExpreesionAndFetchJoin() {
Session session = openSession();
session.beginTransaction();
String hql = "SELECT b, 1 FROM DataMetaPoint b inner join fetch b.dataPoint dp";
session.createQuery(hql)
.setMaxResults(3)
// This should not fail
.list();
HQLQueryPlan queryPlan = new HQLQueryPlan(hql, false, Collections.EMPTY_MAP, sessionFactory());
String sqlQuery = queryPlan.getTranslators()[0]
.collectSqlStrings().get(0);
session.getTransaction().commit();
session.close();
Matcher matcher = Pattern.compile(
"(?is)\\b(?<column>\\w+\\.\\w+)\\s+as\\s+(?<alias>\\w+)\\b.*\\k<column>\\s+as\\s+\\k<alias>")
.matcher(sqlQuery);
if (matcher.find()) {
fail(format("Column %s mapped to alias %s twice in generated SQL: %s", matcher.group("column"),
matcher.group("alias"), sqlQuery));
}
}
@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 < NUMBER_OF_TEST_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();
}
public void cleanupTestData() {
Session session = openSession();
session.beginTransaction();
session.createQuery( "delete DataPoint" ).executeUpdate();
session.getTransaction().commit();
session.close();
}
}