HHH-11886 - Elaborate Envers documentation and switch to actual sourc…

…e code examples

Move code snippets to actual test cases for entity revision queries

documentation/src/main/asciidoc/userguide/chapters/envers/Envers.adoc

@@ -787,13 +787,14 @@ include::{extrasdir}/entities-filtering-and-pagination.sql[]
 
 The entry point for this type of queries is:
 
-[source,java]
+[[revisions-of-entity-query-example]]
+[source, JAVA, indent=0]
 ----
-AuditQuery query = getAuditReader().createQuery()
-    .forRevisionsOfEntity( MyEntity.class, false, true );
+include::{sourcedir}/QueryAuditTest.java[tags=revisions-of-entity-query-example]
 ----
 
 You can add constraints to this query in the same way as to the previous one.
+
 There are some additional possibilities:
 
 . using `AuditEntity.revisionNumber()` you can specify constraints, projections and order on the revision number, in which the audited entity was modified
@@ -804,51 +805,53 @@ There are some additional possibilities:
 . `AuditEntity.revisionType()` gives you access as above to the type of the revision (`ADD`, `MOD`, `DEL`).
 
 Using these methods, you can order the query results by revision number, set projection or constraint the revision number to be greater or less than a specified value, etc.
-For example, the following query will select the smallest revision number, at which entity of class `MyEntity` with id `entityId` has changed, after revision number 42:
+For example, the following query will select the smallest revision number, at which entity of class `MyEntity` with id `entityId` has changed, after revision number 2:
 
-[source,java]
+[[revisions-of-entity-query-by-revision-number-example]]
+[source, JAVA, indent=0]
 ----
-Number revision = (Number) getAuditReader().createQuery()
-    .forRevisionsOfEntity( MyEntity.class, false, true )
-    .setProjection( AuditEntity.revisionNumber().min() )
-    .add( AuditEntity.id().eq( entityId ) )
-    .add( AuditEntity.revisionNumber().gt( 42 ) )
-    .getSingleResult();
+include::{sourcedir}/QueryAuditTest.java[tags=revisions-of-entity-query-by-revision-number-example]
 ----
 
 The second additional feature you can use in queries for revisions is the ability to _maximize_/_minimize_ a property.
-For example, if you want to select the smallest possibler revision at which the value of the `actualDate` for a given entity was larger then a given value:
 
-[source,java]
+For example, if you want to select the smallest possibler revision at which the value of the `createdOn`
+attribute was larger then a given value,
+you can run the following query:
+
+[[revisions-of-entity-query-minimize-example]]
+[source, JAVA, indent=0]
 ----
-Number revision = (Number) getAuditReader().createQuery()
-	.forRevisionsOfEntity( MyEntity.class, false, true) // We are only interested in the first revision
-	.setProjection( AuditEntity.revisionNumber().min() )
-	.add( AuditEntity.property( "actualDate" ).minimize()
-	.add( AuditEntity.property( "actualDate" ).ge( givenDate ) )
-	.add( AuditEntity.id().eq( givenEntityId ) )) .getSingleResult();
+include::{sourcedir}/QueryAuditTest.java[tags=revisions-of-entity-query-minimize-example]
 ----
 
-The `minimize()` and `maximize()` methods return a criteria, to which you can add constraints, which must be met by the entities with the _maximized_/_minimized_ properties.
+The `minimize()` and `maximize()` methods return a criteria, to which you can add constraints,
+which must be met by the entities with the _maximized_/_minimized_ properties.
 
 [NOTE]
 ====
-`AggregatedAuditExpression#computeAggregationInInstanceContext()` enables the possibility to compute aggregated expression in the context of each entity instance separately.
+`AggregatedAuditExpression#computeAggregationInInstanceContext()` enables the possibility to compute
+aggregated expression in the context of each entity instance separately.
+
 It turns out useful when querying for latest revisions of all entities of a particular type.
 ====
 
 You probably also noticed that there are two boolean parameters, passed when creating the query.
 
-`selectEntitiesOnly`:: the first parameter is only valid when you don't set an explicit projection.
-  If true, the result of the query will be a list of entities (which changed at revisions satisfying the specified constraints).
-  If false, the result will be a list of three element arrays:
+`selectEntitiesOnly`:: The first parameter is only valid when you don't set an explicit projection.
++
+If true, the result of the query will be a list of entities (which changed at revisions satisfying the specified constraints).
++
+If false, the result will be a list of three element arrays:
 
-  * the first element will be the changed entity instance.
-  * the second will be an entity containing revision data (if no custom entity is used, this will be an instance of `DefaultRevisionEntity`).
-  * the third will be the type of the revision (one of the values of the `RevisionType` enumeration: `ADD`, `MOD`, `DEL`).
+* the first element will be the changed entity instance.
+* the second will be an entity containing revision data (if no custom entity is used, this will be an instance of `DefaultRevisionEntity`).
+* the third will be the type of the revision (one of the values of the `RevisionType` enumeration: `ADD`, `MOD`, `DEL`).
 
-`selectDeletedEntities`:: the second parameter specifies if revisions, in which the entity was deleted should be included in the results.
-  If yes, such entities will have the revision type `DEL` and all fields, except the id, `null`.
+`selectDeletedEntities`:: The second parameter specifies if revisions,
+in which the entity was deleted should be included in the results.
++
+If yes, such entities will have the revision type `DEL` and all attributes, except the `id`, will be set to `null`.
 
 [[envers-tracking-properties-changes-queries]]
 === Querying for revisions of entity that modified given property

documentation/src/test/java/org/hibernate/userguide/envers/DefaultAuditTest.java

@@ -77,21 +77,23 @@ public void test() {
 
 		doInJPA( this::entityManagerFactory, entityManager -> {
 			//tag::envers-audited-rev1-example[]
-			Customer customer = (Customer) AuditReaderFactory.get( entityManager )
-				.createQuery()
-				.forEntitiesAtRevision( Customer.class, revisions.get( 0 ) )
-				.getSingleResult();
+			Customer customer = (Customer) AuditReaderFactory
+			.get( entityManager )
+			.createQuery()
+			.forEntitiesAtRevision( Customer.class, revisions.get( 0 ) )
+			.getSingleResult();
 
 			assertEquals("Doe", customer.getLastName());
 			//end::envers-audited-rev1-example[]
 		} );
 
 		doInJPA( this::entityManagerFactory, entityManager -> {
 			//tag::envers-audited-rev2-example[]
-			Customer customer = (Customer) AuditReaderFactory.get( entityManager )
-				.createQuery()
-				.forEntitiesAtRevision( Customer.class, revisions.get( 1 ) )
-				.getSingleResult();
+			Customer customer = (Customer) AuditReaderFactory
+			.get( entityManager )
+			.createQuery()
+			.forEntitiesAtRevision( Customer.class, revisions.get( 1 ) )
+			.getSingleResult();
 
 			assertEquals("Doe Jr.", customer.getLastName());
 			//end::envers-audited-rev2-example[]
@@ -100,10 +102,11 @@ public void test() {
 		doInJPA( this::entityManagerFactory, entityManager -> {
 			//tag::envers-audited-rev3-example[]
 			try {
-				Customer customer = (Customer) AuditReaderFactory.get( entityManager )
-					.createQuery()
-					.forEntitiesAtRevision( Customer.class, revisions.get( 2 ) )
-					.getSingleResult();
+				Customer customer = (Customer) AuditReaderFactory
+				.get( entityManager )
+				.createQuery()
+				.forEntitiesAtRevision( Customer.class, revisions.get( 2 ) )
+				.getSingleResult();
 
 				fail("The Customer was deleted at this revision: " + revisions.get( 2 ));
 			}
@@ -114,14 +117,15 @@ public void test() {
 
 		doInJPA( this::entityManagerFactory, entityManager -> {
 			//tag::envers-audited-rev4-example[]
-			Customer customer = (Customer) AuditReaderFactory.get( entityManager )
-				.createQuery()
-				.forEntitiesAtRevision(
-					Customer.class,
-					Customer.class.getName(),
-					revisions.get( 2 ),
-					true )
-				.getSingleResult();
+			Customer customer = (Customer) AuditReaderFactory
+			.get( entityManager )
+			.createQuery()
+			.forEntitiesAtRevision(
+				Customer.class,
+				Customer.class.getName(),
+				revisions.get( 2 ),
+				true )
+			.getSingleResult();
 
 			assertEquals( Long.valueOf( 1L ), customer.getId() );
 			assertNull( customer.getFirstName() );

documentation/src/test/java/org/hibernate/userguide/envers/EntityTypeChangeAuditDefaultTrackingTest.java

@@ -69,10 +69,12 @@ public void testLifecycle() {
 					AvailableSettings.HBM2DDL_AUTO,
 					"update"
 			);
-			entityManagerFactory =  Bootstrap.getEntityManagerFactoryBuilder(
-					new TestingPersistenceUnitDescriptorImpl( getClass().getSimpleName() ),
-					settings
-			).build().unwrap( SessionFactoryImplementor.class );
+			entityManagerFactory =  Bootstrap
+			.getEntityManagerFactoryBuilder(
+				new TestingPersistenceUnitDescriptorImpl( getClass().getSimpleName() ),
+				settings )
+			.build()
+			.unwrap( SessionFactoryImplementor.class );
 
 			final EntityManagerFactory emf = entityManagerFactory;
 

documentation/src/test/java/org/hibernate/userguide/envers/EntityTypeChangeAuditTest.java

@@ -76,8 +76,8 @@ public void testLifecycle() {
 					"update"
 			);
 			entityManagerFactory =  Bootstrap.getEntityManagerFactoryBuilder(
-					new TestingPersistenceUnitDescriptorImpl( getClass().getSimpleName() ),
-					settings
+				new TestingPersistenceUnitDescriptorImpl( getClass().getSimpleName() ),
+				settings
 			).build().unwrap( SessionFactoryImplementor.class );
 
 			final EntityManagerFactory emf = entityManagerFactory;

documentation/src/test/java/org/hibernate/userguide/envers/QueryAuditTest.java

@@ -6,6 +6,9 @@
  */
 package org.hibernate.userguide.envers;
 
+import java.sql.Timestamp;
+import java.time.LocalDateTime;
+import java.time.ZoneOffset;
 import java.util.Arrays;
 import java.util.Date;
 import java.util.List;
@@ -24,6 +27,7 @@
 import org.hibernate.envers.Audited;
 import org.hibernate.envers.configuration.EnversSettings;
 import org.hibernate.envers.query.AuditEntity;
+import org.hibernate.envers.query.AuditQuery;
 import org.hibernate.envers.strategy.ValidityAuditStrategy;
 import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
 
@@ -94,22 +98,24 @@ public void test() {
 
 		doInJPA( this::entityManagerFactory, entityManager -> {
 			//tag::entities-at-revision-example[]
-			Customer customer = (Customer) AuditReaderFactory.get( entityManager )
-				.createQuery()
-				.forEntitiesAtRevision( Customer.class, revisions.get( 0 ) )
-				.getSingleResult();
+			Customer customer = (Customer) AuditReaderFactory
+			.get( entityManager )
+			.createQuery()
+			.forEntitiesAtRevision( Customer.class, revisions.get( 0 ) )
+			.getSingleResult();
 
 			assertEquals("Doe", customer.getLastName());
 			//end::entities-at-revision-example[]
 		} );
 
 		doInJPA( this::entityManagerFactory, entityManager -> {
 			//tag::entities-filtering-example[]
-			List<Customer> customers = AuditReaderFactory.get( entityManager )
-				.createQuery()
-				.forRevisionsOfEntity( Customer.class, true, true )
-				.add( AuditEntity.property( "firstName" ).eq( "John" ) )
-				.getResultList();
+			List<Customer> customers = AuditReaderFactory
+			.get( entityManager )
+			.createQuery()
+			.forRevisionsOfEntity( Customer.class, true, true )
+			.add( AuditEntity.property( "firstName" ).eq( "John" ) )
+			.getResultList();
 
 			assertEquals(2, customers.size());
 			assertEquals( "Doe", customers.get( 0 ).getLastName() );
@@ -121,54 +127,108 @@ public void test() {
 			//tag::entities-filtering-by-entity-example[]
 			Address address = entityManager.getReference( Address.class, 1L );
 
-			List<Customer> customers = AuditReaderFactory.get( entityManager )
-				.createQuery()
-				.forRevisionsOfEntity( Customer.class, true, true )
-				.add( AuditEntity.property( "address" ).eq( address ) )
-				.getResultList();
+			List<Customer> customers = AuditReaderFactory
+			.get( entityManager )
+			.createQuery()
+			.forRevisionsOfEntity( Customer.class, true, true )
+			.add( AuditEntity.property( "address" ).eq( address ) )
+			.getResultList();
 
 			assertEquals(2, customers.size());
 			//end::entities-filtering-by-entity-example[]
 		} );
 
 		doInJPA( this::entityManagerFactory, entityManager -> {
 			//tag::entities-filtering-by-entity-identifier-example[]
-			List<Customer> customers = AuditReaderFactory.get( entityManager )
-				.createQuery()
-				.forRevisionsOfEntity( Customer.class, true, true )
-				.add( AuditEntity.relatedId( "address" ).eq( 1L ) )
-				.getResultList();
+			List<Customer> customers = AuditReaderFactory
+			.get( entityManager )
+			.createQuery()
+			.forRevisionsOfEntity( Customer.class, true, true )
+			.add( AuditEntity.relatedId( "address" ).eq( 1L ) )
+			.getResultList();
 
 			assertEquals(2, customers.size());
 			//end::entities-filtering-by-entity-identifier-example[]
 		} );
 
 		doInJPA( this::entityManagerFactory, entityManager -> {
 			//tag::entities-in-clause-filtering-by-entity-identifier-example[]
-			List<Customer> customers = AuditReaderFactory.get( entityManager )
-				.createQuery()
-				.forRevisionsOfEntity( Customer.class, true, true )
-				.add( AuditEntity.relatedId( "address" ).in( new Object[] { 1L, 2L } ) )
-				.getResultList();
+			List<Customer> customers = AuditReaderFactory
+			.get( entityManager )
+			.createQuery()
+			.forRevisionsOfEntity( Customer.class, true, true )
+			.add( AuditEntity.relatedId( "address" ).in( new Object[] { 1L, 2L } ) )
+			.getResultList();
 
 			assertEquals(2, customers.size());
 			//end::entities-in-clause-filtering-by-entity-identifier-example[]
 		} );
 
 		doInJPA( this::entityManagerFactory, entityManager -> {
 			//tag::entities-filtering-and-pagination[]
-			List<Customer> customers = AuditReaderFactory.get( entityManager )
-				.createQuery()
-				.forRevisionsOfEntity( Customer.class, true, true )
-				.addOrder( AuditEntity.property( "lastName" ).desc() )
-				.add( AuditEntity.relatedId( "address" ).eq( 1L ) )
-				.setFirstResult( 1 )
-				.setMaxResults( 2 )
-				.getResultList();
+			List<Customer> customers = AuditReaderFactory
+			.get( entityManager )
+			.createQuery()
+			.forRevisionsOfEntity( Customer.class, true, true )
+			.addOrder( AuditEntity.property( "lastName" ).desc() )
+			.add( AuditEntity.relatedId( "address" ).eq( 1L ) )
+			.setFirstResult( 1 )
+			.setMaxResults( 2 )
+			.getResultList();
 
 			assertEquals(1, customers.size());
 			//end::entities-filtering-and-pagination[]
 		} );
+
+		doInJPA( this::entityManagerFactory, entityManager -> {
+			//tag::revisions-of-entity-query-example[]
+			AuditQuery query = AuditReaderFactory.get( entityManager )
+				.createQuery()
+				.forRevisionsOfEntity( Customer.class, false, true );
+			//end::revisions-of-entity-query-example[]
+		} );
+
+		doInJPA( this::entityManagerFactory, entityManager -> {
+			//tag::revisions-of-entity-query-by-revision-number-example[]
+			Number revision = (Number) AuditReaderFactory
+			.get( entityManager )
+			.createQuery()
+			.forRevisionsOfEntity( Customer.class, false, true )
+			.addProjection( AuditEntity.revisionNumber().min() )
+			.add( AuditEntity.id().eq( 1L ) )
+			.add( AuditEntity.revisionNumber().gt( 2 ) )
+			.getSingleResult();
+			//end::revisions-of-entity-query-by-revision-number-example[]
+
+			assertEquals( 3, revision );
+		} );
+
+		doInJPA( this::entityManagerFactory, entityManager -> {
+			//tag::revisions-of-entity-query-minimize-example[]
+			Number revision = (Number) AuditReaderFactory
+			.get( entityManager )
+			.createQuery()
+			.forRevisionsOfEntity( Customer.class, false, true )
+			.addProjection( AuditEntity.revisionNumber().min() )
+			.add( AuditEntity.id().eq( 1L ) )
+			.add(
+				AuditEntity.property( "createdOn" )
+				.minimize()
+				.add( AuditEntity.property( "createdOn" )
+					.ge(
+						Timestamp.from(
+							LocalDateTime.now()
+								.minusDays( 1 )
+								.toInstant( ZoneOffset.UTC )
+							)
+					)
+				)
+			)
+			.getSingleResult();
+			//end::revisions-of-entity-query-minimize-example[]
+
+			assertEquals( 1, revision );
+		} );
 	}
 
 	@Audited