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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.query;
import java.util.List;
import org.apache.openjpa.persistence.test.SingleEMTestCase;
import org.apache.openjpa.persistence.models.company.fetchlazy.ProductOrder;
import org.apache.openjpa.persistence.models.company.fetchlazy.LineItem;
import org.apache.openjpa.persistence.models.company.fetchlazy.Product;
import org.apache.openjpa.persistence.models.company.fetchlazy.Customer;
import org.apache.openjpa.persistence.models.company.fetchlazy.Address;
import org.apache.openjpa.persistence.models.company.fetchlazy.Company;
import org.apache.openjpa.persistence.models.company.fetchlazy.Employee;
import org.apache.openjpa.persistence.models.company.fetchlazy.PartTimeEmployee;
import org.apache.openjpa.persistence.models.company.fetchlazy.FullTimeEmployee;
import org.apache.openjpa.persistence.models.company.fetchlazy.Person;
public class TestDistinctQueries extends SingleEMTestCase {
public void setUp() {
setUp(Address.class, Company.class, Customer.class, Employee.class,
FullTimeEmployee.class, LineItem.class, PartTimeEmployee.class,
Person.class, Product.class, ProductOrder.class, CLEAR_TABLES);
ProductOrder order = new ProductOrder();
LineItem item0 = new LineItem();
LineItem item1 = new LineItem();
LineItem item2 = new LineItem();
order.getItems().add(item0);
order.getItems().add(item1);
order.getItems().add(item2);
em.getTransaction().begin();
em.persist(order);
em.persist(item0);
em.persist(item1);
em.persist(item2);
em.getTransaction().commit();
}
public void testDuplicateResultsInNonDistinctJoinFetchQuery() {
List l = em.createQuery("select o from LAZ_ProductOrder o " +
"left join fetch o.items").getResultList();
assertEquals(3, l.size());
}
public void testDuplicateResultsInNonDistinctJoinQuery() {
List l = em.createQuery("select o from LAZ_ProductOrder o " +
"left join o.items item").getResultList();
assertEquals(3, l.size());
}
public void testNoDuplicateResultsInDistinctQuery() {
List l = em.createQuery("select distinct o from LAZ_ProductOrder o " +
"left join o.items item").getResultList();
assertEquals(1, l.size());
}
public void testDuplicateResultsInNonDistinctConstructorJoinQuery() {
List l = em.createQuery("select new " +
"org.apache.openjpa.persistence.query.TestDistinctQueries$Holder(" +
"o.id) from LAZ_ProductOrder o " +
"left join o.items item").getResultList();
assertEquals(3, l.size());
}
public void testNoDuplicateResultsInDistinctConstructorQuery()
throws NoSuchMethodException {
List l = em.createQuery("select distinct new " +
"org.apache.openjpa.persistence.query.TestDistinctQueries$Holder(" +
"o.id) from LAZ_ProductOrder o " +
"left join o.items item").getResultList();
assertEquals(1, l.size());
}
public static class Holder {
public Holder(long id) {
// we don't actually do anything with the returned data
}
}
}