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CascadeTest.java
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CascadeTest.java
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/*
* 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.orm.test.jpa.cascade;
import org.hibernate.testing.orm.junit.EntityManagerFactoryScope;
import org.hibernate.testing.orm.junit.Jpa;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Test;
/**
* @author Max Rydahl Andersen
*/
@Jpa(annotatedClasses = {
Teacher.class,
Student.class,
Song.class,
Author.class
})
public class CascadeTest {
@AfterEach
public void tearDown(EntityManagerFactoryScope scope) {
scope.inTransaction(
entityManager -> {
entityManager.createQuery( "delete from Student" ).executeUpdate();
entityManager.createQuery( "delete from Teacher" ).executeUpdate();
entityManager.createQuery( "delete from Song" ).executeUpdate();
entityManager.createQuery( "delete from Author" ).executeUpdate();
}
);
}
@Test
public void testCascade(EntityManagerFactoryScope scope) {
scope.inTransaction(
entityManager -> {
Teacher teacher = new Teacher();
Student student = new Student();
teacher.setFavoriteStudent( student );
student.setFavoriteTeacher( teacher );
teacher.getStudents().add( student );
student.setPrimaryTeacher( teacher );
entityManager.persist( teacher );
entityManager.getTransaction().commit();
entityManager.getTransaction().begin();
Teacher foundTeacher = (Teacher) entityManager.createQuery( "select t from Teacher as t" )
.getSingleResult();
System.out.println( foundTeacher );
System.out.println( foundTeacher.getFavoriteStudent() );
for ( Student fstudent : foundTeacher.getStudents() ) {
System.out.println( fstudent );
System.out.println( fstudent.getFavoriteTeacher() );
System.out.println( fstudent.getPrimaryTeacher() );
}
}
);
}
@Test
public void testNoCascadeAndMerge(EntityManagerFactoryScope scope) {
Song s1 = new Song();
Author a1 = new Author();
s1.setAuthor( a1 );
scope.inTransaction(
entityManager -> {
entityManager.persist( a1 );
entityManager.persist( s1 );
}
);
Song s2 = scope.fromTransaction(
entityManager -> entityManager.find( Song.class, s1.getId() )
);
scope.inTransaction(
entityManager -> entityManager.merge( s2 )
);
}
}