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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
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package org.apache.openjpa.persistence.relations;
import java.util.List;
import javax.persistence.EntityManager;
import junit.textui.TestRunner;
import org.apache.openjpa.jdbc.conf.JDBCConfiguration;
import org.apache.openjpa.jdbc.sql.DBDictionary;
import org.apache.openjpa.jdbc.sql.OracleDictionary;
import org.apache.openjpa.persistence.OpenJPAEntityManager;
import org.apache.openjpa.persistence.OpenJPAQuery;
import org.apache.openjpa.persistence.test.SQLListenerTestCase;
/**
* Test that when both sides of a mapped-by relation are eager fetched,
* traversing from the mapped-by side to the mapping side cuts off -- that
* we don't traverse in a loop back to the mapped-by side in the generated
* SQL.
*
* @author Abe White
*/
public class TestEagerBidiSQL
extends SQLListenerTestCase {
private long id1;
private long id2;
public void setUp() {
setUp(BidiParent.class, BidiChild.class);
// If using an Oracle DB, use sql92 syntax in order to get a correct
// comparison of SQL. This may not work on Oracle JDBC drivers
// prior to 10.x
DBDictionary dict = ((JDBCConfiguration) emf.getConfiguration())
.getDBDictionaryInstance();
if (dict instanceof OracleDictionary) {
dict.setJoinSyntax("sql92");
}
EntityManager em = emf.createEntityManager();
em.getTransaction().begin();
for (int i = 1; i <= 2; i++) {
BidiParent parent = new BidiParent();
parent.setName("parent" + i);
em.persist(parent);
BidiChild oneOneChild = new BidiChild();
oneOneChild.setName("oneToOneChild" + i);
oneOneChild.setOneToOneParent(parent);
parent.setOneToOneChild(oneOneChild);
em.persist(oneOneChild);
for (int j = 1; j <= 3; j++) {
BidiChild oneManyChild = new BidiChild();
oneManyChild.setName("oneToManyChild" + i + "::" + j);
oneManyChild.setOneToManyParent(parent);
parent.getOneToManyChildren().add(oneManyChild);
em.persist(oneManyChild);
}
if (i == 1)
id1 = parent.getId();
else
id2 = parent.getId();
}
em.getTransaction().commit();
em.close();
}
public void testEagerOwnerOneToManyFind() {
sql.clear();
OpenJPAEntityManager em = emf.createEntityManager();
em.getFetchPlan().addField(BidiParent.class, "oneToManyChildren");
em.getFetchPlan().addField(BidiChild.class, "oneToManyParent");
BidiParent parent = em.find(BidiParent.class, id1);
assertEquals(1, sql.size());
assertNotSQL(".* LEFT OUTER JOIN BidiParent .*");
assertEquals("parent1", parent.getName());
assertEquals(3, parent.getOneToManyChildren().size());
for (int i = 0; i < 3; i++) {
assertEquals("oneToManyChild1::" + (i + 1),
parent.getOneToManyChildren().get(i).getName());
assertEquals(parent,
parent.getOneToManyChildren().get(i).getOneToManyParent());
}
assertEquals(1, sql.size());
em.close();
}
public void testEagerOwnerOneToOneFind() {
sql.clear();
OpenJPAEntityManager em = emf.createEntityManager();
em.getFetchPlan().addField(BidiParent.class, "oneToOneChild");
em.getFetchPlan().addField(BidiChild.class, "oneToOneParent");
BidiParent parent = em.find(BidiParent.class, id1);
assertEquals(1, sql.size());
assertNotSQL(".* LEFT OUTER JOIN BidiParent .*");
assertEquals("parent1", parent.getName());
assertNotNull(parent.getOneToOneChild());
assertEquals("oneToOneChild1", parent.getOneToOneChild().getName());
assertEquals(parent, parent.getOneToOneChild().getOneToOneParent());
assertEquals(1, sql.size());
em.close();
}
public void testEagerOwnerOneToManyQuery() {
sql.clear();
OpenJPAEntityManager em = emf.createEntityManager();
OpenJPAQuery q = em.createQuery("SELECT o FROM BidiParent o "
+ "ORDER BY o.name ASC");
q.getFetchPlan().addField(BidiParent.class, "oneToManyChildren");
q.getFetchPlan().addField(BidiChild.class, "oneToManyParent");
List<BidiParent> res = (List<BidiParent>) q.getResultList();
assertEquals(2, res.size());
assertEquals(sql.toString(), 2, sql.size());
assertNotSQL(".* LEFT OUTER JOIN BidiParent .*");
for (int i = 0; i < res.size(); i++) {
assertEquals("parent" + (i + 1), res.get(i).getName());
assertEquals(3, res.get(i).getOneToManyChildren().size());
for (int j = 0; j < 3; j++) {
assertEquals("oneToManyChild" + (i + 1) + "::" + (j + 1),
res.get(i).getOneToManyChildren().get(j).getName());
assertEquals(res.get(i), res.get(i).getOneToManyChildren().
get(j).getOneToManyParent());
}
}
assertEquals(2, sql.size());
em.close();
}
public void testEagerOwnerOneToOneQuery() {
sql.clear();
OpenJPAEntityManager em = emf.createEntityManager();
OpenJPAQuery q = em.createQuery("SELECT o FROM BidiParent o "
+ "ORDER BY o.name ASC");
q.getFetchPlan().addField(BidiParent.class, "oneToOneChild");
q.getFetchPlan().addField(BidiChild.class, "oneToOneParent");
List<BidiParent> res = (List<BidiParent>) q.getResultList();
assertEquals(2, res.size());
assertEquals(1, sql.size());
assertNotSQL(".* LEFT OUTER JOIN BidiParent .*");
for (int i = 0; i < res.size(); i++) {
assertEquals("parent" + (i + 1), res.get(i).getName());
assertNotNull(res.get(i).getOneToOneChild());
assertEquals("oneToOneChild" + (i + 1),
res.get(i).getOneToOneChild().getName());
assertEquals(res.get(i),
res.get(i).getOneToOneChild().getOneToOneParent());
}
assertEquals(1, sql.size());
em.close();
}
public void testEagerNonOwnerOneToOneQuery() {
sql.clear();
OpenJPAEntityManager em = emf.createEntityManager();
OpenJPAQuery q = em.createQuery("SELECT o FROM BidiParent o "
+ "ORDER BY o.name ASC");
q.getFetchPlan().addField(BidiParent.class, "oneToOneChild");
q.getFetchPlan().addField(BidiChild.class, "oneToManyParent");
List<BidiParent> res = (List<BidiParent>) q.getResultList();
assertEquals(2, res.size());
assertEquals(1, sql.size());
assertSQL(".* LEFT OUTER JOIN BidiParent .*");
for (int i = 0; i < res.size(); i++) {
assertEquals("parent" + (i + 1), res.get(i).getName());
assertNotNull(res.get(i).getOneToOneChild());
assertEquals("oneToOneChild" + (i + 1),
res.get(i).getOneToOneChild().getName());
assertNull(res.get(i).getOneToOneChild().getOneToManyParent());
}
assertEquals(1, sql.size());
em.close();
}
public static void main(String[] args) {
TestRunner.run(TestEagerBidiSQL.class);
}
}