Hibernate example source code file (CriteriaHQLAlignmentTest.java)
The Hibernate CriteriaHQLAlignmentTest.java source code/*
* Hibernate, Relational Persistence for Idiomatic Java
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package org.hibernate.test.hql;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Collections;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.Projections;
import org.hibernate.exception.SQLGrammarException;
import org.hibernate.hql.spi.QueryTranslator;
import org.hibernate.hql.spi.QueryTranslatorFactory;
import org.hibernate.hql.internal.ast.QueryTranslatorImpl;
import org.hibernate.hql.internal.ast.tree.SelectClause;
import org.hibernate.hql.internal.classic.ClassicQueryTranslatorFactory;
import org.hibernate.type.BigDecimalType;
import org.hibernate.type.BigIntegerType;
import org.hibernate.type.DoubleType;
import org.hibernate.type.LongType;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.hibernate.testing.TestForIssue;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.fail;
/**
* Tests cases for ensuring alignment between HQL and Criteria behavior.
*
* @author Max Rydahl Andersen
*/
public class CriteriaHQLAlignmentTest extends QueryTranslatorTestCase {
private boolean initialVersion2SqlFlagValue;
@Before
public void setVersion2SqlFlag() {
initialVersion2SqlFlagValue = SelectClause.VERSION2_SQL;
SelectClause.VERSION2_SQL = true;
}
@After
public void resetVersion2SqlFlag() {
SelectClause.VERSION2_SQL = initialVersion2SqlFlagValue;
}
@Override
public String[] getMappings() {
return new String[] {
"hql/Animal.hbm.xml",
};
}
@Override
public boolean createSchema() {
return true; // needed for the Criteria return type test
}
@Override
public boolean rebuildSessionFactoryOnError() {
return true;
}
@Test
public void testHQLAggregationReturnType() {
// EJB3: COUNT returns Long
QueryTranslatorImpl translator = createNewQueryTranslator( "select count(*) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", LongType.INSTANCE, translator.getReturnTypes()[0] );
translator = createNewQueryTranslator( "select count(h.heightInches) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", LongType.INSTANCE, translator.getReturnTypes()[0] );
// MAX, MIN return the type of the state-field to which they are applied.
translator = createNewQueryTranslator( "select max(h.heightInches) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", DoubleType.INSTANCE, translator.getReturnTypes()[0] );
translator = createNewQueryTranslator( "select max(h.id) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", LongType.INSTANCE, translator.getReturnTypes()[0] );
// AVG returns Double.
translator = createNewQueryTranslator( "select avg(h.heightInches) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", DoubleType.INSTANCE, translator.getReturnTypes()[0] );
translator = createNewQueryTranslator( "select avg(h.id) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", DoubleType.INSTANCE, translator.getReturnTypes()[0] );
translator = createNewQueryTranslator( "select avg(h.bigIntegerValue) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", DoubleType.INSTANCE, translator.getReturnTypes()[0] );
// SUM returns Long when applied to state-fields of integral types (other than BigInteger);
translator = createNewQueryTranslator( "select sum(h.id) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", LongType.INSTANCE, translator.getReturnTypes()[0] );
translator = createNewQueryTranslator( "select sum(h.intValue) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", LongType.INSTANCE, translator.getReturnTypes()[0] );
// SUM returns Double when applied to state-fields of floating point types;
translator = createNewQueryTranslator( "select sum(h.heightInches) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", DoubleType.INSTANCE, translator.getReturnTypes()[0] );
translator = createNewQueryTranslator( "select sum(h.floatValue) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", DoubleType.INSTANCE, translator.getReturnTypes()[0] );
// SUM returns BigInteger when applied to state-fields of type BigInteger
translator = createNewQueryTranslator( "select sum(h.bigIntegerValue) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", BigIntegerType.INSTANCE, translator.getReturnTypes()[0] );
// SUM and BigDecimal when applied to state-fields of type BigDecimal.
translator = createNewQueryTranslator( "select sum(h.bigDecimalValue) from Human h" );
assertEquals( "incorrect return type count", 1, translator.getReturnTypes().length );
assertEquals( "incorrect return type", BigDecimalType.INSTANCE, translator.getReturnTypes()[0] );
// special case to test classicquery special case handling of count(*)
String hql = "select count(*) from Human h";
QueryTranslatorFactory classic = new ClassicQueryTranslatorFactory();
QueryTranslator oldQueryTranslator = classic.createQueryTranslator( hql, hql, Collections.EMPTY_MAP, sessionFactory() );
oldQueryTranslator.compile( Collections.EMPTY_MAP, true);
assertEquals( "incorrect return type count", 1, oldQueryTranslator.getReturnTypes().length );
assertEquals( "incorrect return type", LongType.INSTANCE, oldQueryTranslator.getReturnTypes()[0] );
}
@Test
@TestForIssue( jiraKey = "HHH-1724" )
public void testCriteriaAggregationReturnType() {
Session s = openSession();
s.beginTransaction();
Human human = new Human();
human.setBigIntegerValue( new BigInteger("42") );
human.setBigDecimalValue( new BigDecimal(45) );
s.save(human);
s.flush();
s.clear();
// EJB3: COUNT returns Long
Long longValue = (Long) s.createCriteria( Human.class ).setProjection( Projections.rowCount()).uniqueResult();
assertEquals(longValue, new Long(1));
longValue = (Long) s.createCriteria( Human.class ).setProjection( Projections.count("heightInches")).uniqueResult();
assertEquals(longValue, new Long(1));
// MAX, MIN return the type of the state-field to which they are applied.
Double dblValue = (Double) s.createCriteria( Human.class ).setProjection( Projections.max( "heightInches" )).uniqueResult();
assertNotNull(dblValue);
longValue = (Long) s.createCriteria( Human.class ).setProjection( Projections.max( "id" )).uniqueResult();
assertNotNull(longValue);
// AVG returns Double.
dblValue = (Double) s.createCriteria( Human.class ).setProjection( Projections.avg( "heightInches" )).uniqueResult();
assertNotNull(dblValue);
dblValue = (Double) s.createCriteria( Human.class ).setProjection( Projections.avg( "id" )).uniqueResult();
assertNotNull(dblValue);
dblValue = (Double) s.createCriteria( Human.class ).setProjection( Projections.avg( "bigIntegerValue" )).uniqueResult();
assertNotNull(dblValue);
// SUM returns Long when applied to state-fields of integral types (other than BigInteger);
longValue = (Long) s.createCriteria( Human.class ).setProjection( Projections.sum( "id" )).uniqueResult();
assertNotNull(longValue);
longValue = (Long) s.createCriteria( Human.class ).setProjection( Projections.sum( "intValue" )).uniqueResult();
assertNotNull(longValue);
// SUM returns Double when applied to state-fields of floating point types;
dblValue = (Double) s.createCriteria( Human.class ).setProjection( Projections.sum( "heightInches" )).uniqueResult();
assertNotNull(dblValue);
dblValue = (Double) s.createCriteria( Human.class ).setProjection( Projections.sum( "floatValue" )).uniqueResult();
assertNotNull(dblValue);
// SUM returns BigInteger when applied to state-fields of type BigInteger
BigInteger bigIValue = (BigInteger) s.createCriteria( Human.class ).setProjection( Projections.sum( "bigIntegerValue" )).uniqueResult();
assertNotNull(bigIValue);
// SUM and BigDecimal when applied to state-fields of type BigDecimal.
BigDecimal bigDValue = (BigDecimal) s.createCriteria( Human.class ).setProjection( Projections.sum( "bigDecimalValue" )).uniqueResult();
assertNotNull(bigDValue);
s.delete( human );
s.flush();
s.getTransaction().commit();
s.close();
}
@Test
public void testCountReturnValues() {
Session s = openSession();
Transaction t = s.beginTransaction();
Human human1 = new Human();
human1.setName( new Name( "John", 'Q', "Public" ) );
human1.setNickName( "Johnny" );
s.save(human1);
Human human2 = new Human();
human2.setName( new Name( "John", 'A', "Doe" ) );
human2.setNickName( "Johnny" );
s.save( human2 );
Human human3 = new Human();
human3.setName( new Name( "John", 'A', "Doe" ) );
human3.setNickName( "Jack" );
s.save( human3 );
Human human4 = new Human();
human4.setName( new Name( "John", 'A', "Doe" ) );
s.save( human4 );
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
Long count = ( Long ) s.createQuery( "select count( * ) from Human" ).uniqueResult();
assertEquals( 4, count.longValue() );
s.clear();
count = ( Long ) s.createCriteria( Human.class )
.setProjection( Projections.rowCount() )
.uniqueResult();
assertEquals( 4, count.longValue() );
s.clear();
count = ( Long ) s.createQuery( "select count( nickName ) from Human" ).uniqueResult();
assertEquals( 3, count.longValue() );
s.clear();
count = ( Long ) s.createCriteria( Human.class )
.setProjection( Projections.count( "nickName" ) )
.uniqueResult();
assertEquals( 3, count.longValue() );
s.clear();
count = ( Long ) s.createQuery( "select count( distinct nickName ) from Human" ).uniqueResult();
assertEquals( 2, count.longValue() );
s.clear();
count = ( Long ) s.createCriteria( Human.class )
.setProjection( Projections.count( "nickName" ).setDistinct() )
.uniqueResult();
assertEquals( 2, count.longValue() );
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
try {
count = ( Long ) s.createQuery( "select count( distinct name ) from Human" ).uniqueResult();
if ( ! getDialect().supportsTupleDistinctCounts() ) {
fail( "expected SQLGrammarException" );
}
assertEquals( 2, count.longValue() );
}
catch ( SQLGrammarException ex ) {
if ( ! getDialect().supportsTupleDistinctCounts() ) {
// expected
}
else {
throw ex;
}
}
finally {
t.rollback();
s.close();
}
s = openSession();
t = s.beginTransaction();
try {
count = ( Long ) s.createCriteria( Human.class )
.setProjection( Projections.count( "name" ).setDistinct() )
.uniqueResult();
if ( ! getDialect().supportsTupleDistinctCounts() ) {
fail( "expected SQLGrammarException" );
}
assertEquals( 2, count.longValue() );
}
catch ( SQLGrammarException ex ) {
if ( ! getDialect().supportsTupleDistinctCounts() ) {
// expected
}
else {
throw ex;
}
}
finally {
t.rollback();
s.close();
}
s = openSession();
t = s.beginTransaction();
count = ( Long ) s.createQuery( "select count( distinct name.first ) from Human" ).uniqueResult();
assertEquals( 1, count.longValue() );
s.clear();
count = ( Long ) s.createCriteria( Human.class )
.setProjection( Projections.count( "name.first" ).setDistinct() )
.uniqueResult();
assertEquals( 1, count.longValue() );
t.commit();
s.close();
s = openSession();
t = s.beginTransaction();
try {
count = ( Long ) s.createQuery( "select count( name ) from Human" ).uniqueResult();
if ( ! getDialect().supportsTupleCounts() ) {
fail( "expected SQLGrammarException" );
}
assertEquals( 1, count.longValue() );
}
catch ( SQLGrammarException ex ) {
if ( ! getDialect().supportsTupleCounts() ) {
// expected
}
else {
throw ex;
}
}
finally {
t.rollback();
s.close();
}
s = openSession();
t = s.beginTransaction();
try {
count = ( Long ) s.createCriteria( Human.class )
.setProjection( Projections.count( "name" ) )
.uniqueResult();
if ( ! getDialect().supportsTupleCounts() ) {
fail( "expected SQLGrammarException" );
}
assertEquals( 1, count.longValue() );
}
catch ( SQLGrammarException ex ) {
if ( ! getDialect().supportsTupleCounts() ) {
// expected
}
else {
throw ex;
}
}
finally {
t.rollback();
s.close();
}
s = openSession();
t = s.beginTransaction();
s.createQuery( "delete from Human" ).executeUpdate();
t.commit();
s.close();
}
}
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