Hibernate example source code file (QueryTest.java)
The Hibernate QueryTest.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.query;
import javax.persistence.EntityManager;
import javax.persistence.Query;
import javax.persistence.TemporalType;
import javax.persistence.Tuple;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.hibernate.Hibernate;
import org.hibernate.ejb.test.BaseEntityManagerFunctionalTestCase;
import org.hibernate.ejb.test.Distributor;
import org.hibernate.ejb.test.Item;
import org.hibernate.ejb.test.Wallet;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
/**
* @author Emmanuel Bernard
*/
public class QueryTest extends BaseEntityManagerFunctionalTestCase {
@Test
public void testPagedQuery() throws Exception {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
Item item = new Item( "Mouse", "Micro$oft mouse" );
em.persist( item );
item = new Item( "Computer", "Apple II" );
em.persist( item );
Query q = em.createQuery( "select i from " + Item.class.getName() + " i where i.name like :itemName" );
q.setParameter( "itemName", "%" );
q.setMaxResults( 1 );
q.getSingleResult();
q = em.createQuery( "select i from Item i where i.name like :itemName" );
q.setParameter( "itemName", "%" );
q.setFirstResult( 1 );
q.setMaxResults( 1 );
em.getTransaction().rollback();
em.close();
}
@Test
public void testAggregationReturnType() throws Exception {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
Item item = new Item( "Mouse", "Micro$oft mouse" );
em.persist( item );
item = new Item( "Computer", "Apple II" );
em.persist( item );
Query q = em.createQuery( "select count(i) from Item i where i.name like :itemName" );
q.setParameter( "itemName", "%" );
assertTrue( q.getSingleResult() instanceof Long );
em.getTransaction().rollback();
em.close();
}
@Test
public void testParameterList() throws Exception {
final Item item = new Item( "Mouse", "Micro$oft mouse" );
final Item item2 = new Item( "Computer", "Dell computer" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( item );
em.persist( item2 );
assertTrue( em.contains( item ) );
em.getTransaction().commit();
em.getTransaction().begin();
Query q = em.createQuery( "select item from Item item where item.name in :names" );
//test hint in value and string
q.setHint( "org.hibernate.fetchSize", 10 );
q.setHint( "org.hibernate.fetchSize", "10" );
List params = new ArrayList();
params.add( item.getName() );
q.setParameter( "names", params );
List result = q.getResultList();
assertNotNull( result );
assertEquals( 1, result.size() );
q = em.createQuery( "select item from Item item where item.name in :names" );
//test hint in value and string
q.setHint( "org.hibernate.fetchSize", 10 );
q.setHint( "org.hibernate.fetchSize", "10" );
params.add( item2.getName() );
q.setParameter( "names", params );
result = q.getResultList();
assertNotNull( result );
assertEquals( 2, result.size() );
q = em.createQuery( "select item from Item item where item.name in ?1" );
params = new ArrayList();
params.add( item.getName() );
params.add( item2.getName() );
q.setParameter( "1", params );
result = q.getResultList();
assertNotNull( result );
assertEquals( 2, result.size() );
em.remove( result.get( 0 ) );
em.remove( result.get( 1 ) );
em.getTransaction().commit();
em.close();
}
@Test
public void testParameterListInExistingParens() throws Exception {
final Item item = new Item( "Mouse", "Micro$oft mouse" );
final Item item2 = new Item( "Computer", "Dell computer" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( item );
em.persist( item2 );
assertTrue( em.contains( item ) );
em.getTransaction().commit();
em.getTransaction().begin();
Query q = em.createQuery( "select item from Item item where item.name in (:names)" );
//test hint in value and string
q.setHint( "org.hibernate.fetchSize", 10 );
q.setHint( "org.hibernate.fetchSize", "10" );
List params = new ArrayList();
params.add( item.getName() );
params.add( item2.getName() );
q.setParameter( "names", params );
List result = q.getResultList();
assertNotNull( result );
assertEquals( 2, result.size() );
q = em.createQuery( "select item from Item item where item.name in ( \n :names \n)\n" );
//test hint in value and string
q.setHint( "org.hibernate.fetchSize", 10 );
q.setHint( "org.hibernate.fetchSize", "10" );
params = new ArrayList();
params.add( item.getName() );
params.add( item2.getName() );
q.setParameter( "names", params );
result = q.getResultList();
assertNotNull( result );
assertEquals( 2, result.size() );
q = em.createQuery( "select item from Item item where item.name in ( ?1 )" );
params = new ArrayList();
params.add( item.getName() );
params.add( item2.getName() );
q.setParameter( "1", params );
result = q.getResultList();
assertNotNull( result );
assertEquals( 2, result.size() );
em.remove( result.get( 0 ) );
em.remove( result.get( 1 ) );
em.getTransaction().commit();
em.close();
}
@Test
public void testEscapeCharacter() throws Exception {
final Item item = new Item( "Mouse", "Micro_oft mouse" );
final Item item2 = new Item( "Computer", "Dell computer" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( item );
em.persist( item2 );
assertTrue( em.contains( item ) );
em.getTransaction().commit();
em.getTransaction().begin();
Query q = em.createQuery( "select item from Item item where item.descr like 'Microk_oft mouse' escape 'k' " );
List result = q.getResultList();
assertNotNull( result );
assertEquals( 1, result.size() );
int deleted = em.createQuery( "delete from Item" ).executeUpdate();
assertEquals( 2, deleted );
em.getTransaction().commit();
em.close();
}
@Test
public void testNativeQueryByEntity() {
Item item = new Item( "Mouse", "Micro$oft mouse" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( item );
assertTrue( em.contains( item ) );
em.getTransaction().commit();
em.getTransaction().begin();
item = (Item) em.createNativeQuery( "select * from Item", Item.class ).getSingleResult();
assertNotNull( item );
assertEquals( "Micro$oft mouse", item.getDescr() );
em.remove( item );
em.getTransaction().commit();
em.close();
}
@Test
public void testNativeQueryByResultSet() {
Item item = new Item( "Mouse", "Micro$oft mouse" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( item );
assertTrue( em.contains( item ) );
em.getTransaction().commit();
em.getTransaction().begin();
item = (Item) em.createNativeQuery( "select name as itemname, descr as itemdescription from Item", "getItem" )
.getSingleResult();
assertNotNull( item );
assertEquals( "Micro$oft mouse", item.getDescr() );
em.remove( item );
em.getTransaction().commit();
em.close();
}
@Test
public void testExplicitPositionalParameter() throws Exception {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
Wallet w = new Wallet();
w.setBrand( "Lacoste" );
w.setModel( "Minimic" );
w.setSerial( "0100202002" );
em.persist( w );
em.getTransaction().commit();
em.getTransaction().begin();
Query query = em.createQuery( "select w from " + Wallet.class.getName() + " w where w.brand in ?1" );
List brands = new ArrayList();
brands.add( "Lacoste" );
query.setParameter( 1, brands );
w = (Wallet) query.getSingleResult();
assertNotNull( w );
query = em.createQuery( "select w from " + Wallet.class.getName() + " w where w.marketEntrance = ?1" );
query.setParameter( 1, new Date(), TemporalType.DATE );
//assertNull( query.getSingleResult() );
assertEquals( 0, query.getResultList().size() );
em.remove( w );
em.getTransaction().commit();
em.close();
}
@Test
public void testPositionalParameterForms() throws Exception {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
Wallet w = new Wallet();
w.setBrand( "Lacoste" );
w.setModel( "Minimic" );
w.setSerial( "0100202002" );
em.persist( w );
em.getTransaction().commit();
em.getTransaction().begin();
// first using jpa-style positional parameter
Query query = em.createQuery( "select w from Wallet w where w.brand = ?1" );
query.setParameter( 1, "Lacoste" );
w = (Wallet) query.getSingleResult();
assertNotNull( w );
// next using jpa-style positional parameter, but as a name (which is how Hibernate core treats these
query = em.createQuery( "select w from Wallet w where w.brand = ?1" );
query.setParameter( "1", "Lacoste" );
w = (Wallet) query.getSingleResult();
assertNotNull( w );
// finally using hql-style positional parameter
query = em.createQuery( "select w from Wallet w where w.brand = ?" );
query.setParameter( 1, "Lacoste" );
w = (Wallet) query.getSingleResult();
assertNotNull( w );
em.remove( w );
em.getTransaction().commit();
em.close();
}
@Test
public void testPositionalParameterWithUserError() throws Exception {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
Wallet w = new Wallet();
w.setBrand( "Lacoste" );
w.setModel( "Minimic" );
w.setSerial( "0100202002" );
em.persist( w );
em.flush();
try {
Query query = em.createQuery( "select w from Wallet w where w.brand = ?1 and w.model = ?3" );
query.setParameter( 1, "Lacoste" );
query.setParameter( 2, "Expensive" );
query.getResultList();
fail("The query should fail due to a user error in parameters");
}
catch ( IllegalArgumentException e ) {
//success
}
finally {
em.getTransaction().rollback();
em.close();
}
}
@Test
public void testNativeQuestionMarkParameter() throws Exception {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
Wallet w = new Wallet();
w.setBrand( "Lacoste" );
w.setModel( "Minimic" );
w.setSerial( "0100202002" );
em.persist( w );
em.getTransaction().commit();
em.getTransaction().begin();
Query query = em.createNativeQuery( "select * from Wallet w where w.brand = ?", Wallet.class );
query.setParameter( 1, "Lacoste" );
w = (Wallet) query.getSingleResult();
assertNotNull( w );
em.remove( w );
em.getTransaction().commit();
em.close();
}
@Test
public void testNativeQueryWithPositionalParameter() {
Item item = new Item( "Mouse", "Micro$oft mouse" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( item );
assertTrue( em.contains( item ) );
em.getTransaction().commit();
em.getTransaction().begin();
Query query = em.createNativeQuery( "select * from Item where name = ?1", Item.class );
query.setParameter( 1, "Mouse" );
item = (Item) query.getSingleResult();
assertNotNull( item );
assertEquals( "Micro$oft mouse", item.getDescr() );
query = em.createNativeQuery( "select * from Item where name = ?", Item.class );
query.setParameter( 1, "Mouse" );
item = (Item) query.getSingleResult();
assertNotNull( item );
assertEquals( "Micro$oft mouse", item.getDescr() );
em.remove( item );
em.getTransaction().commit();
em.close();
}
@Test
public void testDistinct() throws Exception {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.createQuery( "delete Item" ).executeUpdate();
em.createQuery( "delete Distributor" ).executeUpdate();
Distributor d1 = new Distributor();
d1.setName( "Fnac" );
Distributor d2 = new Distributor();
d2.setName( "Darty" );
Item item = new Item( "Mouse", "Micro$oft mouse" );
item.getDistributors().add( d1 );
item.getDistributors().add( d2 );
em.persist( d1 );
em.persist( d2 );
em.persist( item );
em.flush();
em.clear();
Query q = em.createQuery( "select distinct i from Item i left join fetch i.distributors" );
item = (Item) q.getSingleResult()
;
//assertEquals( 1, distinctResult.size() );
//item = (Item) distinctResult.get( 0 );
assertTrue( Hibernate.isInitialized( item.getDistributors() ) );
assertEquals( 2, item.getDistributors().size() );
em.getTransaction().rollback();
em.close();
}
@Test
public void testIsNull() throws Exception {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
Distributor d1 = new Distributor();
d1.setName( "Fnac" );
Distributor d2 = new Distributor();
d2.setName( "Darty" );
Item item = new Item( "Mouse", null );
Item item2 = new Item( "Mouse2", "dd" );
item.getDistributors().add( d1 );
item.getDistributors().add( d2 );
em.persist( d1 );
em.persist( d2 );
em.persist( item );
em.persist( item2 );
em.flush();
em.clear();
Query q = em.createQuery(
"select i from Item i where i.descr = :descr or (i.descr is null and cast(:descr as string) is null)"
);
//Query q = em.createQuery( "select i from Item i where (i.descr is null and :descr is null) or (i.descr = :descr");
q.setParameter( "descr", "dd" );
List result = q.getResultList();
assertEquals( 1, result.size() );
q.setParameter( "descr", null );
result = q.getResultList();
assertEquals( 1, result.size() );
//item = (Item) distinctResult.get( 0 );
em.getTransaction().rollback();
em.close();
}
@Test
public void testUpdateQuery() {
Item item = new Item( "Mouse", "Micro$oft mouse" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( item );
assertTrue( em.contains( item ) );
em.flush();
em.clear();
assertEquals(
1, em.createNativeQuery(
"update Item set descr = 'Logitech Mouse' where name = 'Mouse'"
).executeUpdate()
);
item = em.find( Item.class, item.getName() );
assertEquals( "Logitech Mouse", item.getDescr() );
em.remove( item );
em.getTransaction().rollback();
em.close();
}
@Test
public void testUnavailableNamedQuery() throws Exception {
Item item = new Item( "Mouse", "Micro$oft mouse" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( item );
try {
em.createNamedQuery( "wrong name" );
fail("Wrong named query should raise an exception");
}
catch (IllegalArgumentException e) {
//success
}
em.getTransaction().commit();
em.clear();
em.getTransaction().begin();
em.remove( em.find( Item.class, item.getName() ) );
em.getTransaction().commit();
em.close();
}
@Test
public void testTypedNamedNativeQuery() {
Item item = new Item( "Mouse", "Micro$oft mouse" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( item );
assertTrue( em.contains( item ) );
em.getTransaction().commit();
em.getTransaction().begin();
item = em.createNamedQuery( "nativeItem1", Item.class ).getSingleResult();
item = em.createNamedQuery( "nativeItem2", Item.class ).getSingleResult();
assertNotNull( item );
assertEquals( "Micro$oft mouse", item.getDescr() );
em.remove( item );
em.getTransaction().commit();
em.close();
}
@Test
public void testTypedScalarQueries() {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
Item item = new Item( "Mouse", "Micro$oft mouse" );
em.persist( item );
assertTrue( em.contains( item ) );
em.getTransaction().commit();
em.getTransaction().begin();
Object[] itemData = em.createQuery( "select i.name,i.descr from Item i", Object[].class ).getSingleResult();
assertEquals( 2, itemData.length );
assertEquals( String.class, itemData[0].getClass() );
assertEquals( String.class, itemData[1].getClass() );
Tuple itemTuple = em.createQuery( "select i.name,i.descr from Item i", Tuple.class ).getSingleResult();
assertEquals( 2, itemTuple.getElements().size() );
assertEquals( String.class, itemTuple.get( 0 ).getClass() );
assertEquals( String.class, itemTuple.get( 1 ).getClass() );
Item itemView = em.createQuery( "select new Item(i.name,i.descr) from Item i", Item.class ).getSingleResult();
assertNotNull( itemView );
assertEquals( "Micro$oft mouse", itemView.getDescr() );
em.remove( item );
em.getTransaction().commit();
em.close();
}
@Override
public Class[] getAnnotatedClasses() {
return new Class[]{
Item.class,
Distributor.class,
Wallet.class
};
}
}
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