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70 changes: 45 additions & 25 deletions
70
jopa-api/src/main/java/cz/cvut/kbss/jopa/model/PersistenceUnitUtil.java
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|---|---|---|
| @@ -1,35 +1,55 @@ | ||
| /** | ||
| * Copyright (C) 2016 Czech Technical University in Prague | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify it under | ||
| * the terms of the GNU General Public License as published by the Free Software | ||
| * Foundation, either version 3 of the License, or (at your option) any | ||
| * later version. | ||
| * | ||
| * 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 General Public License for more | ||
| * details. You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| * <p> | ||
| * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public | ||
| * License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later | ||
| * version. | ||
| * <p> | ||
| * 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 General Public License for more | ||
| * details. You should have received a copy of the GNU General Public License along with this program. If not, see | ||
| * <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package cz.cvut.kbss.jopa.model; | ||
|
|
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| /** | ||
| * Utility interface between the application and the persistence provider managing the persistence unit. | ||
| * <p> | ||
| * The methods of this interface should only be invoked on entity instances obtained from or managed by entity managers | ||
| * for this persistence unit or on new entity instances. | ||
| */ | ||
| public interface PersistenceUnitUtil { | ||
|
|
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| public boolean isLoaded(Object entity, String attributeName); | ||
| /** | ||
| * Determine the load state of a given persistent attribute of an entity belonging to the persistence unit. | ||
| * | ||
| * @param entity entity instance containing the attribute | ||
| * @param attributeName name of attribute whose load state is to be determined | ||
| * @return false if entity's state has not been loaded or if the attribute state has not been loaded, else true | ||
| */ | ||
| boolean isLoaded(Object entity, String attributeName); | ||
|
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| public boolean isLoaded(Object entity); | ||
| /** | ||
| * Determine the load state of an entity belonging to the persistence unit. | ||
| * <p> | ||
| * This method can be used to determine the load state of an entity passed as a reference. An entity is considered | ||
| * loaded if all attributes for which {@code FetchType.EAGER} has been specified have been loaded. | ||
| * <p> | ||
| * The {@link #isLoaded(Object, String)} method should be used to determine the load state of an attribute. Not | ||
| * doing so might lead to unintended loading of state. | ||
| * | ||
| * @param entity entity instance whose load state is to be determined | ||
| * @return false if the entity has not been loaded, else true | ||
| */ | ||
| boolean isLoaded(Object entity); | ||
|
|
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| /** | ||
| * Return the id of the entity. A generated id is not guaranteed to be | ||
| * available until after the database insert has occurred. Returns null if | ||
| * the entity does not yet have an id. | ||
| * | ||
| * @param entity | ||
| * entity instance | ||
| * @return id of the entity | ||
| * @throws IllegalArgumentException | ||
| * if the object is found not to be an entity | ||
| */ | ||
| public Object getIdentifier(Object entity); | ||
| /** | ||
| * Return the id of the entity. A generated id is not guaranteed to be available until after the database insert has | ||
| * occurred. Returns null if the entity does not yet have an id. | ||
| * | ||
| * @param entity entity instance | ||
| * @return id of the entity | ||
| * @throws IllegalArgumentException if the object is found not to be an entity | ||
| */ | ||
| Object getIdentifier(Object entity); | ||
| } |
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89 changes: 89 additions & 0 deletions
89
jopa-impl/src/test/java/cz/cvut/kbss/jopa/model/EntityManagerFactoryImplTest.java
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| @@ -0,0 +1,89 @@ | ||
| package cz.cvut.kbss.jopa.model; | ||
|
|
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| import cz.cvut.kbss.jopa.environment.OWLClassA; | ||
| import cz.cvut.kbss.jopa.environment.utils.DataSourceStub; | ||
| import cz.cvut.kbss.jopa.environment.utils.Generators; | ||
| import cz.cvut.kbss.ontodriver.Connection; | ||
| import cz.cvut.kbss.ontodriver.Types; | ||
| import org.junit.Before; | ||
| import org.junit.Test; | ||
| import org.mockito.Mock; | ||
| import org.mockito.MockitoAnnotations; | ||
|
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| import java.util.HashMap; | ||
| import java.util.Map; | ||
|
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| import static org.junit.Assert.assertFalse; | ||
| import static org.junit.Assert.assertTrue; | ||
| import static org.mockito.Mockito.mock; | ||
| import static org.mockito.Mockito.when; | ||
|
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| public class EntityManagerFactoryImplTest { | ||
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| private EntityManagerFactoryImpl emf; | ||
|
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| @Mock | ||
| private Connection connection; | ||
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| @Before | ||
| public void setUp() { | ||
| MockitoAnnotations.initMocks(this); | ||
| final Map<String, String> props = new HashMap<>(); | ||
| props.put(JOPAPersistenceProperties.DATA_SOURCE_CLASS, DataSourceStub.class.getName()); | ||
| props.put(JOPAPersistenceProperties.ONTOLOGY_PHYSICAL_URI_KEY, | ||
| Generators.createIndividualIdentifier().toString()); | ||
| props.put(JOPAPersistenceProperties.SCAN_PACKAGE, "cz.cvut.kbss.jopa.environment"); | ||
| this.emf = new EntityManagerFactoryImpl(props); | ||
| emf.createEntityManager(); | ||
| emf.getServerSession().unwrap(DataSourceStub.class).setConnection(connection); | ||
| when(connection.types()).thenReturn(mock(Types.class)); | ||
| } | ||
|
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| @Test | ||
| public void isLoadedReturnsTrueForManagedInstance() { | ||
| final EntityManager em = emf.createEntityManager(); | ||
| try { | ||
| final OWLClassA a = Generators.generateOwlClassAInstance(); | ||
| em.persist(a); | ||
| assertTrue(emf.isLoaded(a)); | ||
| } finally { | ||
| em.close(); | ||
| } | ||
| } | ||
|
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| @Test | ||
| public void isLoadedReturnsTrueForAttributeOfManagedInstance() throws Exception { | ||
| final EntityManager em = emf.createEntityManager(); | ||
| try { | ||
| final OWLClassA a = Generators.generateOwlClassAInstance(); | ||
| em.persist(a); | ||
| assertTrue(emf.isLoaded(a, OWLClassA.getStrAttField().getName())); | ||
| } finally { | ||
| em.close(); | ||
| } | ||
| } | ||
|
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| @Test | ||
| public void isLoadedReturnsFalseNonNonManagedInstance() { | ||
| final EntityManager emOne = emf.createEntityManager(); | ||
| final EntityManager emTwo = emf.createEntityManager(); | ||
| try { | ||
| assertFalse(emf.isLoaded(Generators.generateOwlClassAInstance())); | ||
| } finally { | ||
| emOne.close(); | ||
| emTwo.close(); | ||
| } | ||
| } | ||
|
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| @Test | ||
| public void isLoadedReturnsFalseNonNonManagedInstanceWithAttribute() throws Exception { | ||
| final EntityManager emOne = emf.createEntityManager(); | ||
| final EntityManager emTwo = emf.createEntityManager(); | ||
| try { | ||
| assertFalse(emf.isLoaded(Generators.generateOwlClassAInstance(), OWLClassA.getStrAttField().getName())); | ||
| } finally { | ||
| emOne.close(); | ||
| emTwo.close(); | ||
| } | ||
| } | ||
| } |
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