HHH-18337 Account for physical naming strategy when querying db sequence

Introduced new signature for `Configurable#configure` which accepts a `GeneratorCreationContext`.

hibernate-core/src/main/java/org/hibernate/boot/model/internal/GeneratorBinder.java

@@ -560,7 +560,7 @@ public class GeneratorBinder {
 
 	/**
 	 * If the given {@link Generator} also implements {@link Configurable},
-	 * call its {@link Configurable#configure(Type, Properties, ServiceRegistry)
+	 * call its {@link Configurable#configure(GeneratorCreationContext, Properties)
 	 * configure()} method.
 	 */
 	private static void callConfigure(
@@ -568,15 +568,14 @@ public class GeneratorBinder {
 			Generator generator,
 			Map<String, Object> configuration,
 			SimpleValue identifierValue) {
-		if ( generator instanceof Configurable ) {
+		if ( generator instanceof final Configurable configurable ) {
-			final Configurable configurable = (Configurable) generator;
 			final Properties parameters = collectParameters(
 					identifierValue,
 					creationContext.getDatabase().getDialect(),
 					creationContext.getRootClass(),
 					configuration
 			);
-			configurable.configure( identifierValue.getType(), parameters, creationContext.getServiceRegistry() );
+			configurable.configure( creationContext, parameters );
 		}
 	}
 

hibernate-core/src/main/java/org/hibernate/boot/model/internal/GeneratorParameters.java

@@ -15,6 +15,7 @@ import org.hibernate.cfg.AvailableSettings;
 import org.hibernate.dialect.Dialect;
 import org.hibernate.engine.config.spi.ConfigurationService;
 import org.hibernate.engine.config.spi.StandardConverters;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.id.Configurable;
 import org.hibernate.id.IdentifierGenerator;
 import org.hibernate.id.OptimizableGenerator;
@@ -38,7 +39,7 @@ import java.util.Properties;
 
 /**
  * Responsible for setting up the parameters which are passed to
- * {@link Configurable#configure(Type, Properties, ServiceRegistry)}
+ * {@link Configurable#configure(GeneratorCreationContext, Properties)}
  * when a {@link Configurable} generator is instantiated.
  *
  * @since 7.0
@@ -51,7 +52,7 @@ public class GeneratorParameters {
 
 	/**
 	 * Collect the parameters which should be passed to
-	 * {@link Configurable#configure(Type, Properties, ServiceRegistry)}.
+	 * {@link Configurable#configure(GeneratorCreationContext, Properties)}.
 	 */
 	public static Properties collectParameters(
 			SimpleValue identifierValue,

hibernate-core/src/main/java/org/hibernate/generator/GeneratorCreationContext.java

@@ -12,6 +12,7 @@ import org.hibernate.mapping.PersistentClass;
 import org.hibernate.mapping.Property;
 import org.hibernate.mapping.RootClass;
 import org.hibernate.service.ServiceRegistry;
+import org.hibernate.type.Type;
 
 /**
  * An object passed as a parameter to the constructor or
@@ -34,4 +35,7 @@ public interface GeneratorCreationContext {
 	RootClass getRootClass();
 
 	Property getProperty();
+	default Type getType() {
+		return getProperty().getType();
+	}
 }

hibernate-core/src/main/java/org/hibernate/id/Configurable.java

@@ -11,6 +11,7 @@ import java.util.Properties;
 import org.hibernate.MappingException;
 import org.hibernate.boot.model.relational.Database;
 import org.hibernate.boot.model.relational.SqlStringGenerationContext;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.service.ServiceRegistry;
 import org.hibernate.type.Type;
 
@@ -21,6 +22,13 @@ import org.hibernate.type.Type;
  * @author Steve Ebersole
  */
 public interface Configurable {
+	/**
+	 * @deprecated Use {@link #configure(GeneratorCreationContext, Properties)} instead
+	 */
+	@Deprecated( since = "7.0", forRemoval = true )
+	default void configure(Type type, Properties parameters, ServiceRegistry serviceRegistry) throws MappingException {
+	}
+
 	/**
 	 * Configure this instance, given the value of parameters
 	 * specified by the user as XML {@code <param>} elements and
@@ -32,13 +40,14 @@ public interface Configurable {
 	 * then this method is always called before
 	 * {@link org.hibernate.boot.model.relational.ExportableProducer#registerExportables(Database)},
 	 *
-	 * @param type The id property type descriptor
+	 * @param creationContext Access to the generator creation context
 	 * @param parameters param values, keyed by parameter name
-	 * @param serviceRegistry Access to service that may be needed.
 	 *
 	 * @throws MappingException when there's something wrong with the given parameters
 	 */
-	void configure(Type type, Properties parameters, ServiceRegistry serviceRegistry) throws MappingException;
+	default void configure(GeneratorCreationContext creationContext, Properties parameters) throws MappingException {
+		configure( creationContext.getType(), parameters, creationContext.getServiceRegistry() );
+	};
 
 	/**
 	 * Initializes this instance, pre-generating SQL if necessary.

hibernate-core/src/main/java/org/hibernate/id/ForeignGenerator.java

@@ -10,6 +10,7 @@ import java.util.Properties;
 
 import org.hibernate.MappingException;
 import org.hibernate.engine.spi.SharedSessionContractImplementor;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.service.ServiceRegistry;
 import org.hibernate.type.Type;
 
@@ -68,7 +69,7 @@ public class ForeignGenerator implements IdentifierGenerator {
 
 
 	@Override
-	public void configure(Type type, Properties parameters, ServiceRegistry serviceRegistry) throws MappingException {
+	public void configure(GeneratorCreationContext creationContext, Properties parameters) throws MappingException {
 		propertyName = parameters.getProperty( PROPERTY );
 		entityName = parameters.getProperty( ENTITY_NAME );
 		if ( propertyName==null ) {

hibernate-core/src/main/java/org/hibernate/id/IdentifierGenerator.java

@@ -17,6 +17,8 @@ import org.hibernate.boot.model.relational.SqlStringGenerationContext;
 import org.hibernate.engine.spi.SharedSessionContractImplementor;
 import org.hibernate.generator.EventType;
 import org.hibernate.generator.EventTypeSets;
+import org.hibernate.generator.Generator;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.service.ServiceRegistry;
 import org.hibernate.generator.BeforeExecutionGenerator;
 import org.hibernate.type.Type;
@@ -39,7 +41,7 @@ import static org.hibernate.generator.EventTypeSets.INSERT_ONLY;
  * {@code ExportableProducer}, in case the implementation needs to export
  * objects to the database as part of the process of schema export.
  * <p>
- * The {@link #configure(Type, Properties, ServiceRegistry)} method accepts
+ * The {@link #configure(GeneratorCreationContext, Properties)} method accepts
  * a properties object containing named values. These include:
  * <ul>
  * <li>several "standard" parameters with keys defined as static members of
@@ -104,7 +106,7 @@ public interface IdentifierGenerator extends BeforeExecutionGenerator, Exportabl
 	 * for example, a sequence or tables.
 	 * <p>
 	 * This method is called just once, after
-	 * {@link #configure(Type, Properties, ServiceRegistry)}.
+	 * {@link #configure(GeneratorCreationContext, Properties)}.
 	 *
 	 * @param database The database instance
 	 */

hibernate-core/src/main/java/org/hibernate/id/IncrementGenerator.java

@@ -22,6 +22,7 @@ import org.hibernate.dialect.Dialect;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
 import org.hibernate.engine.jdbc.env.spi.JdbcEnvironment;
 import org.hibernate.engine.spi.SharedSessionContractImplementor;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.internal.CoreLogging;
 import org.hibernate.internal.CoreMessageLogger;
 import org.hibernate.service.ServiceRegistry;
@@ -85,10 +86,10 @@ public class IncrementGenerator implements IdentifierGenerator {
 	}
 
 	@Override
-	public void configure(Type type, Properties parameters, ServiceRegistry serviceRegistry) throws MappingException {
+	public void configure(GeneratorCreationContext creationContext, Properties parameters) throws MappingException {
-		returnClass = type.getReturnedClass();
+		returnClass = creationContext.getType().getReturnedClass();
 
-		final JdbcEnvironment jdbcEnvironment = serviceRegistry.requireService( JdbcEnvironment.class );
+		final JdbcEnvironment jdbcEnvironment = creationContext.getServiceRegistry().requireService( JdbcEnvironment.class );
 		final IdentifierHelper identifierHelper = jdbcEnvironment.getIdentifierHelper();
 
 		column = parameters.getProperty( COLUMN );

hibernate-core/src/main/java/org/hibernate/id/PersistentIdentifierGenerator.java

@@ -8,6 +8,7 @@ package org.hibernate.id;
 
 import java.util.Properties;
 
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.service.ServiceRegistry;
 import org.hibernate.type.Type;
 
@@ -15,7 +16,7 @@ import org.hibernate.type.Type;
  * An {@link IdentifierGenerator} that requires creation of database objects.
  * <p>
  * All instances have access to a special mapping parameter in their
- * {@link #configure(Type, Properties, ServiceRegistry)} method: schema
+ * {@link #configure(GeneratorCreationContext, Properties)} method: schema
  *
  * @author Gavin King
  * @author Steve Ebersole

hibernate-core/src/main/java/org/hibernate/id/PostInsertIdentifierGenerator.java

@@ -8,8 +8,9 @@ package org.hibernate.id;
 
 import org.hibernate.generator.EventType;
 import org.hibernate.generator.EventTypeSets;
-import org.hibernate.service.ServiceRegistry;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.generator.OnExecutionGenerator;
+import org.hibernate.service.ServiceRegistry;
 import org.hibernate.type.Type;
 
 import java.util.EnumSet;

hibernate-core/src/main/java/org/hibernate/id/SelectGenerator.java

@@ -9,9 +9,9 @@ package org.hibernate.id;
 import java.util.Properties;
 
 import org.hibernate.dialect.Dialect;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.generator.OnExecutionGenerator;
 import org.hibernate.persister.entity.EntityPersister;
-import org.hibernate.service.ServiceRegistry;
 import org.hibernate.type.Type;
 
 import static org.hibernate.generator.internal.NaturalIdHelper.getNaturalIdPropertyNames;
@@ -87,7 +87,7 @@ public class SelectGenerator
 	private String uniqueKeyPropertyName;
 
 	@Override
-	public void configure(Type type, Properties parameters, ServiceRegistry serviceRegistry) {
+	public void configure(GeneratorCreationContext creationContext, Properties parameters) {
 		uniqueKeyPropertyName = parameters.getProperty( KEY );
 	}
 

hibernate-core/src/main/java/org/hibernate/id/UUIDGenerator.java

@@ -14,10 +14,10 @@ import org.hibernate.MappingException;
 import org.hibernate.boot.registry.classloading.spi.ClassLoaderService;
 import org.hibernate.boot.registry.classloading.spi.ClassLoadingException;
 import org.hibernate.engine.spi.SharedSessionContractImplementor;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.id.uuid.StandardRandomStrategy;
 import org.hibernate.internal.CoreLogging;
 import org.hibernate.internal.CoreMessageLogger;
-import org.hibernate.service.ServiceRegistry;
 import org.hibernate.type.Type;
 import org.hibernate.type.descriptor.java.UUIDJavaType;
 
@@ -50,7 +50,7 @@ public class UUIDGenerator implements IdentifierGenerator {
 	private UUIDJavaType.ValueTransformer valueTransformer;
 
 	@Override
-	public void configure(Type type, Properties parameters, ServiceRegistry serviceRegistry) throws MappingException {
+	public void configure(GeneratorCreationContext creationContext, Properties parameters) throws MappingException {
 		// check first for an explicit strategy instance
 		strategy = (UUIDGenerationStrategy) parameters.get( UUID_GEN_STRATEGY );
 
@@ -60,7 +60,7 @@ public class UUIDGenerator implements IdentifierGenerator {
 			if ( strategyClassName != null ) {
 				try {
 					final Class<?> strategyClass =
-							serviceRegistry.requireService( ClassLoaderService.class )
+							creationContext.getServiceRegistry().requireService( ClassLoaderService.class )
 									.classForName( strategyClassName );
 					try {
 						strategy = (UUIDGenerationStrategy) strategyClass.newInstance();
@@ -80,6 +80,7 @@ public class UUIDGenerator implements IdentifierGenerator {
 			strategy = StandardRandomStrategy.INSTANCE;
 		}
 
+		final Type type = creationContext.getType();
 		if ( UUID.class.isAssignableFrom( type.getReturnedClass() ) ) {
 			valueTransformer = UUIDJavaType.PassThroughTransformer.INSTANCE;
 		}

hibernate-core/src/main/java/org/hibernate/id/UUIDHexGenerator.java

@@ -10,9 +10,9 @@ import java.util.Properties;
 
 import org.hibernate.MappingException;
 import org.hibernate.engine.spi.SharedSessionContractImplementor;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.internal.CoreLogging;
 import org.hibernate.internal.CoreMessageLogger;
-import org.hibernate.service.ServiceRegistry;
 import org.hibernate.type.Type;
 
 import static org.hibernate.internal.util.config.ConfigurationHelper.getString;
@@ -53,7 +53,7 @@ public class UUIDHexGenerator extends AbstractUUIDGenerator {
 
 
 	@Override
-	public void configure(Type type, Properties parameters, ServiceRegistry serviceRegistry) throws MappingException {
+	public void configure(GeneratorCreationContext creationContext, Properties parameters) throws MappingException {
 		sep = getString( SEPARATOR, parameters, "" );
 	}
 

hibernate-core/src/main/java/org/hibernate/id/enhanced/SequenceStyleGenerator.java

@@ -24,6 +24,7 @@ import org.hibernate.engine.config.spi.ConfigurationService;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
 import org.hibernate.engine.jdbc.env.spi.JdbcEnvironment;
 import org.hibernate.engine.spi.SharedSessionContractImplementor;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.id.BulkInsertionCapableIdentifierGenerator;
 import org.hibernate.id.IdentifierGenerator;
 import org.hibernate.id.PersistentIdentifierGenerator;
@@ -193,11 +194,12 @@ public class SequenceStyleGenerator
 	// Configurable implementation ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 	@Override
-	public void configure(Type type, Properties parameters, ServiceRegistry serviceRegistry) throws MappingException {
+	public void configure(GeneratorCreationContext creationContext, Properties parameters) throws MappingException {
+		final ServiceRegistry serviceRegistry = creationContext.getServiceRegistry();
 		final JdbcEnvironment jdbcEnvironment = serviceRegistry.requireService( JdbcEnvironment.class );
 		final Dialect dialect = jdbcEnvironment.getDialect();
 
-		identifierType = type;
+		this.identifierType = creationContext.getType();
 
 		final QualifiedName sequenceName = determineSequenceName( parameters, dialect, jdbcEnvironment, serviceRegistry );
 		final int initialValue = determineInitialValue( parameters );
@@ -214,7 +216,8 @@ public class SequenceStyleGenerator
 				physicalSequence,
 				optimizationStrategy,
 				serviceRegistry,
-				determineContributor( parameters )
+				determineContributor( parameters ),
+				creationContext
 		);
 
 		if ( physicalSequence
@@ -224,8 +227,8 @@ public class SequenceStyleGenerator
 			LOG.forcingTableUse();
 		}
 
-		databaseStructure = buildDatabaseStructure(
+		this.databaseStructure = buildDatabaseStructure(
-				type,
+				identifierType,
 				parameters,
 				jdbcEnvironment,
 				forceTableUse,
@@ -251,7 +254,8 @@ public class SequenceStyleGenerator
 			boolean physicalSequence,
 			OptimizerDescriptor optimizationStrategy,
 			ServiceRegistry serviceRegistry,
-			String contributor) {
+			String contributor,
+			GeneratorCreationContext creationContext) {
 		final ConfigurationService configurationService = serviceRegistry.requireService( ConfigurationService.class );
 		final SequenceMismatchStrategy sequenceMismatchStrategy = configurationService.getSetting(
 				AvailableSettings.SEQUENCE_INCREMENT_SIZE_MISMATCH_STRATEGY,
@@ -262,7 +266,13 @@ public class SequenceStyleGenerator
 		if ( sequenceMismatchStrategy != SequenceMismatchStrategy.NONE
 				&& optimizationStrategy.isPooled()
 				&& physicalSequence ) {
-			final String databaseSequenceName = sequenceName.getObjectName().getText();
+			final Database database = creationContext.getDatabase();
+			final String databaseSequenceName = database != null ?
+					database.getPhysicalNamingStrategy().toPhysicalSequenceName(
+							sequenceName.getObjectName(),
+							jdbcEnvironment
+					).getText() :
+					sequenceName.getObjectName().getText();
 			final Number databaseIncrementValue =
 					isSchemaToBeRecreated( contributor, configurationService ) ? null
 							: getSequenceIncrementValue( jdbcEnvironment, databaseSequenceName );

hibernate-core/src/main/java/org/hibernate/id/enhanced/TableGenerator.java

@@ -36,6 +36,7 @@ import org.hibernate.engine.spi.SessionEventListenerManager;
 import org.hibernate.engine.spi.SharedSessionContractImplementor;
 import org.hibernate.event.spi.EventManager;
 import org.hibernate.event.spi.HibernateMonitoringEvent;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.id.ExportableColumn;
 import org.hibernate.id.IdentifierGeneratorHelper;
 import org.hibernate.id.IntegralDataTypeHolder;
@@ -332,10 +333,11 @@ public class TableGenerator implements PersistentIdentifierGenerator {
 	}
 
 	@Override
-	public void configure(Type type, Properties parameters, ServiceRegistry serviceRegistry) throws MappingException {
+	public void configure(GeneratorCreationContext creationContext, Properties parameters) throws MappingException {
+		final ServiceRegistry serviceRegistry = creationContext.getServiceRegistry();
 		storeLastUsedValue = serviceRegistry.requireService( ConfigurationService.class )
 				.getSetting( AvailableSettings.TABLE_GENERATOR_STORE_LAST_USED, StandardConverters.BOOLEAN, true );
-		identifierType = type;
+		identifierType = creationContext.getType();
 
 		final JdbcEnvironment jdbcEnvironment = serviceRegistry.requireService( JdbcEnvironment.class );
 

hibernate-core/src/main/java/org/hibernate/mapping/SimpleValue.java

@@ -1051,6 +1051,11 @@ public abstract class SimpleValue implements KeyValue {
 			return rootClass.getIdentifierProperty();
 		}
 
+		@Override
+		public Type getType() {
+			return SimpleValue.this.getType();
+		}
+
 		// we could add these if it helps integrate old infrastructure
 //		@Override
 //		public Properties getParameters() {

hibernate-core/src/test/java/org/hibernate/orm/test/id/SequenceStyleGeneratorBehavesLikeSequeceHiloGeneratorWitZeroIncrementSizeTest.java

@@ -11,15 +11,23 @@ import java.util.Properties;
 import org.hibernate.Session;
 import org.hibernate.boot.Metadata;
 import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.model.relational.Database;
 import org.hibernate.boot.registry.StandardServiceRegistry;
 import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
 import org.hibernate.boot.spi.MetadataBuildingContext;
+import org.hibernate.boot.spi.MetadataImplementor;
 import org.hibernate.cfg.AvailableSettings;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.engine.spi.SessionImplementor;
 import org.hibernate.engine.spi.SharedSessionContractImplementor;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.id.enhanced.SequenceStyleGenerator;
+import org.hibernate.mapping.PersistentClass;
+import org.hibernate.mapping.Property;
+import org.hibernate.mapping.RootClass;
+import org.hibernate.service.ServiceRegistry;
 import org.hibernate.type.StandardBasicTypes;
+import org.hibernate.type.Type;
 
 import org.hibernate.testing.boot.MetadataBuildingContextTestingImpl;
 import org.hibernate.testing.orm.junit.BaseUnitTest;
@@ -27,6 +35,7 @@ import org.hibernate.testing.orm.junit.DialectFeatureChecks.SupportsSequences;
 import org.hibernate.testing.orm.junit.RequiresDialectFeature;
 import org.hibernate.testing.transaction.TransactionUtil;
 import org.hibernate.testing.util.ServiceRegistryUtil;
+import org.hibernate.testing.util.uuid.IdGeneratorCreationContext;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -63,12 +72,51 @@ public class SequenceStyleGeneratorBehavesLikeSequeceHiloGeneratorWitZeroIncreme
 		properties.setProperty( SequenceStyleGenerator.OPT_PARAM, "legacy-hilo" );
 		properties.setProperty( SequenceStyleGenerator.INCREMENT_PARAM, "0" ); // JPA allocationSize of 1
 		generator.configure(
-				buildingContext.getBootstrapContext()
+				new GeneratorCreationContext() {
-						.getTypeConfiguration()
+					@Override
-						.getBasicTypeRegistry()
+					public Database getDatabase() {
-						.resolve( StandardBasicTypes.LONG ),
+						return buildingContext.getMetadataCollector().getDatabase();
-				properties,
+					}
-				serviceRegistry
+
+					@Override
+					public ServiceRegistry getServiceRegistry() {
+						return serviceRegistry;
+					}
+
+					@Override
+					public String getDefaultCatalog() {
+						return "";
+					}
+
+					@Override
+					public String getDefaultSchema() {
+						return "";
+					}
+
+					@Override
+					public PersistentClass getPersistentClass() {
+						return null;
+					}
+
+					@Override
+					public RootClass getRootClass() {
+						return null;
+					}
+
+					@Override
+					public Property getProperty() {
+						return null;
+					}
+
+					@Override
+					public Type getType() {
+						return buildingContext.getBootstrapContext()
+								.getTypeConfiguration()
+								.getBasicTypeRegistry()
+								.resolve( StandardBasicTypes.LONG );
+					}
+				},
+				properties
 		);
 
 		final Metadata metadata = new MetadataSources( serviceRegistry ).buildMetadata();

hibernate-core/src/test/java/org/hibernate/orm/test/id/enhanced/SequenceStyleConfigUnitTest.java

@@ -12,6 +12,7 @@ import org.hibernate.boot.model.relational.Database;
 import org.hibernate.boot.model.relational.internal.SqlStringGenerationContextImpl;
 import org.hibernate.boot.registry.StandardServiceRegistry;
 import org.hibernate.boot.spi.MetadataBuildingContext;
+import org.hibernate.boot.spi.MetadataImplementor;
 import org.hibernate.cfg.AvailableSettings;
 import org.hibernate.cfg.Environment;
 import org.hibernate.dialect.DatabaseVersion;
@@ -19,6 +20,7 @@ import org.hibernate.dialect.Dialect;
 import org.hibernate.dialect.sequence.ANSISequenceSupport;
 import org.hibernate.dialect.sequence.SequenceSupport;
 import org.hibernate.engine.jdbc.spi.JdbcServices;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.id.OptimizableGenerator;
 import org.hibernate.id.PersistentIdentifierGenerator;
 import org.hibernate.id.enhanced.DatabaseStructure;
@@ -32,12 +34,18 @@ import org.hibernate.id.enhanced.SequenceStructure;
 import org.hibernate.id.enhanced.SequenceStyleGenerator;
 import org.hibernate.id.enhanced.StandardOptimizerDescriptor;
 import org.hibernate.id.enhanced.TableStructure;
+import org.hibernate.mapping.PersistentClass;
+import org.hibernate.mapping.Property;
+import org.hibernate.mapping.RootClass;
+import org.hibernate.service.ServiceRegistry;
 import org.hibernate.type.StandardBasicTypes;
+import org.hibernate.type.Type;
 import org.hibernate.type.spi.TypeConfiguration;
 
 import org.hibernate.testing.boot.MetadataBuildingContextTestingImpl;
 import org.hibernate.testing.orm.junit.BaseUnitTest;
 import org.hibernate.testing.util.ServiceRegistryUtil;
+import org.hibernate.testing.util.uuid.IdGeneratorCreationContext;
 import org.junit.jupiter.api.Test;
 
 import static org.hamcrest.Matchers.instanceOf;
@@ -55,6 +63,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
  */
 @BaseUnitTest
 public class SequenceStyleConfigUnitTest {
+	private static final Type LONG_TYPE = new TypeConfiguration().getBasicTypeRegistry().resolve( StandardBasicTypes.LONG );
 
 	/**
 	 * Test all params defaulted with a dialect supporting pooled sequences
@@ -72,10 +81,8 @@ public class SequenceStyleConfigUnitTest {
 			Properties props = buildGeneratorPropertiesBase( buildingContext );
 			SequenceStyleGenerator generator = new SequenceStyleGenerator();
 			generator.configure(
-					new TypeConfiguration().getBasicTypeRegistry()
+					new TestGeneratorCreationContext( LONG_TYPE, buildingContext, serviceRegistry ),
-							.resolve( StandardBasicTypes.LONG ),
+					props
-					props,
-					serviceRegistry
 			);
 
 			Database database = new Database( buildingContext.getBuildingOptions() );
@@ -118,10 +125,8 @@ public class SequenceStyleConfigUnitTest {
 			Properties props = buildGeneratorPropertiesBase( buildingContext );
 			SequenceStyleGenerator generator = new SequenceStyleGenerator();
 			generator.configure(
-					new TypeConfiguration().getBasicTypeRegistry()
+					new TestGeneratorCreationContext( LONG_TYPE, buildingContext, serviceRegistry ),
-							.resolve( StandardBasicTypes.LONG ),
+					props
-					props,
-					serviceRegistry
 			);
 
 			Database database = new Database( buildingContext.getBuildingOptions() );
@@ -160,10 +165,8 @@ public class SequenceStyleConfigUnitTest {
 
 			SequenceStyleGenerator generator = new SequenceStyleGenerator();
 			generator.configure(
-					new TypeConfiguration().getBasicTypeRegistry()
+					new TestGeneratorCreationContext( LONG_TYPE, buildingContext, serviceRegistry ),
-							.resolve( StandardBasicTypes.LONG ),
+					props
-					props,
-					serviceRegistry
 			);
 
 			Database database = new Database( buildingContext.getBuildingOptions() );
@@ -190,10 +193,8 @@ public class SequenceStyleConfigUnitTest {
 
 			SequenceStyleGenerator generator = new SequenceStyleGenerator();
 			generator.configure(
-					new TypeConfiguration().getBasicTypeRegistry()
+					new TestGeneratorCreationContext( LONG_TYPE, buildingContext, serviceRegistry ),
-							.resolve( StandardBasicTypes.LONG ),
+					props
-					props,
-					serviceRegistry
 			);
 			Database database = new Database( buildingContext.getBuildingOptions() );
 			generator.registerExportables( database );
@@ -226,10 +227,8 @@ public class SequenceStyleConfigUnitTest {
 
 			SequenceStyleGenerator generator = new SequenceStyleGenerator();
 			generator.configure(
-					new TypeConfiguration().getBasicTypeRegistry()
+					new TestGeneratorCreationContext( LONG_TYPE, buildingContext, serviceRegistry ),
-							.resolve( StandardBasicTypes.LONG ),
+					props
-					props,
-					serviceRegistry
 			);
 			Database database = new Database( buildingContext.getBuildingOptions() );
 			generator.registerExportables( database );
@@ -260,10 +259,8 @@ public class SequenceStyleConfigUnitTest {
 
 			SequenceStyleGenerator generator = new SequenceStyleGenerator();
 			generator.configure(
-					new TypeConfiguration().getBasicTypeRegistry()
+					new TestGeneratorCreationContext( LONG_TYPE, buildingContext, serviceRegistry ),
-							.resolve( StandardBasicTypes.LONG ),
+					props
-					props,
-					serviceRegistry
 			);
 			Database database = new Database( buildingContext.getBuildingOptions() );
 			generator.registerExportables( database );
@@ -294,16 +291,16 @@ public class SequenceStyleConfigUnitTest {
 					() -> buildingContext.getBootstrapContext().getTypeConfiguration(),
 					serviceRegistry
 			);
+			final GeneratorCreationContext creationContext = new TestGeneratorCreationContext(
+					LONG_TYPE,
+					buildingContext,
+					serviceRegistry
+			);
 			Properties props = buildGeneratorPropertiesBase( buildingContext );
 			props.setProperty( SequenceStyleGenerator.OPT_PARAM, StandardOptimizerDescriptor.NONE.getExternalName() );
 			props.setProperty( SequenceStyleGenerator.INCREMENT_PARAM, "20" );
 			SequenceStyleGenerator generator = new SequenceStyleGenerator();
-			generator.configure(
+			generator.configure( creationContext, props );
-					new TypeConfiguration().getBasicTypeRegistry()
-							.resolve( StandardBasicTypes.LONG ),
-					props,
-					serviceRegistry
-			);
 			Database database = new Database( buildingContext.getBuildingOptions() );
 			generator.registerExportables( database );
 			generator.initialize( SqlStringGenerationContextImpl.forTests( database.getJdbcEnvironment() ) );
@@ -318,12 +315,7 @@ public class SequenceStyleConfigUnitTest {
 			props.setProperty( SequenceStyleGenerator.OPT_PARAM, StandardOptimizerDescriptor.HILO.getExternalName() );
 			props.setProperty( SequenceStyleGenerator.INCREMENT_PARAM, "20" );
 			generator = new SequenceStyleGenerator();
-			generator.configure(
+			generator.configure( creationContext, props );
-					new TypeConfiguration().getBasicTypeRegistry()
-							.resolve( StandardBasicTypes.LONG ),
-					props,
-					serviceRegistry
-			);
 			generator.registerExportables( database );
 			generator.initialize( SqlStringGenerationContextImpl.forTests( database.getJdbcEnvironment() ) );
 			assertClassAssignability( SequenceStructure.class, generator.getDatabaseStructure().getClass() );
@@ -336,12 +328,7 @@ public class SequenceStyleConfigUnitTest {
 			props.setProperty( SequenceStyleGenerator.OPT_PARAM, StandardOptimizerDescriptor.POOLED.getExternalName() );
 			props.setProperty( SequenceStyleGenerator.INCREMENT_PARAM, "20" );
 			generator = new SequenceStyleGenerator();
-			generator.configure(
+			generator.configure( creationContext, props );
-					new TypeConfiguration().getBasicTypeRegistry()
-							.resolve( StandardBasicTypes.LONG ),
-					props,
-					serviceRegistry
-			);
 			generator.registerExportables( database );
 			generator.initialize( SqlStringGenerationContextImpl.forTests( database.getJdbcEnvironment() ) );
 			// because the dialect reports to not support pooled seqyences, the expectation is that we will
@@ -363,15 +350,15 @@ public class SequenceStyleConfigUnitTest {
 					() -> buildingContext.getBootstrapContext().getTypeConfiguration(),
 					serviceRegistry
 			);
+			final GeneratorCreationContext creationContext = new TestGeneratorCreationContext(
+					LONG_TYPE,
+					buildingContext,
+					serviceRegistry
+			);
 			Properties props = buildGeneratorPropertiesBase( buildingContext );
 			props.setProperty( SequenceStyleGenerator.INCREMENT_PARAM, "20" );
 			SequenceStyleGenerator generator = new SequenceStyleGenerator();
-			generator.configure(
+			generator.configure( creationContext, props );
-					new TypeConfiguration().getBasicTypeRegistry()
-							.resolve( StandardBasicTypes.LONG ),
-					props,
-					serviceRegistry
-			);
 			Database database = new Database( buildingContext.getBuildingOptions() );
 			generator.registerExportables( database );
 			generator.initialize( SqlStringGenerationContextImpl.forTests( database.getJdbcEnvironment() ) );
@@ -380,12 +367,7 @@ public class SequenceStyleConfigUnitTest {
 
 			props.setProperty( Environment.PREFERRED_POOLED_OPTIMIZER, StandardOptimizerDescriptor.POOLED_LO.getExternalName() );
 			generator = new SequenceStyleGenerator();
-			generator.configure(
+			generator.configure( creationContext, props );
-					new TypeConfiguration().getBasicTypeRegistry()
-							.resolve( StandardBasicTypes.LONG ),
-					props,
-					serviceRegistry
-			);
 			generator.registerExportables( database );
 			generator.initialize( SqlStringGenerationContextImpl.forTests( database.getJdbcEnvironment() ) );
 			assertClassAssignability( SequenceStructure.class, generator.getDatabaseStructure().getClass() );
@@ -393,12 +375,7 @@ public class SequenceStyleConfigUnitTest {
 
 			props.setProperty( Environment.PREFERRED_POOLED_OPTIMIZER, StandardOptimizerDescriptor.POOLED_LOTL.getExternalName() );
 			generator = new SequenceStyleGenerator();
-			generator.configure(
+			generator.configure( creationContext, props );
-					new TypeConfiguration().getBasicTypeRegistry()
-							.resolve( StandardBasicTypes.LONG ),
-					props,
-					serviceRegistry
-			);
 			generator.registerExportables( database );
 			generator.initialize( SqlStringGenerationContextImpl.forTests( database.getJdbcEnvironment() ) );
 			assertClassAssignability( SequenceStructure.class, generator.getDatabaseStructure().getClass() );
@@ -437,4 +414,55 @@ public class SequenceStyleConfigUnitTest {
 		}
 	}
 
+	private static class TestGeneratorCreationContext implements GeneratorCreationContext {
+		private final Type type;
+		private final MetadataImplementor metadata;
+		private final ServiceRegistry serviceRegistry;
+
+		public TestGeneratorCreationContext(Type type, MetadataBuildingContext buildingContext, ServiceRegistry serviceRegistry) {
+			this.type = type;
+			this.metadata = buildingContext.getMetadataCollector();
+			this.serviceRegistry = serviceRegistry;
+		}
+
+		@Override
+		public Database getDatabase() {
+			return metadata.getDatabase();
+		}
+
+		@Override
+		public ServiceRegistry getServiceRegistry() {
+			return serviceRegistry;
+		}
+
+		@Override
+		public String getDefaultCatalog() {
+			return "";
+		}
+
+		@Override
+		public String getDefaultSchema() {
+			return "";
+		}
+
+		@Override
+		public PersistentClass getPersistentClass() {
+			return null;
+		}
+
+		@Override
+		public RootClass getRootClass() {
+			return null;
+		}
+
+		@Override
+		public Property getProperty() {
+			return null;
+		}
+
+		@Override
+		public Type getType() {
+			return type;
+		}
+	}
 }

hibernate-core/src/test/java/org/hibernate/orm/test/idgen/enhanced/table/Db2GenerationTest.java

@@ -15,14 +15,22 @@ import org.hibernate.boot.model.relational.SqlStringGenerationContext;
 import org.hibernate.boot.model.relational.internal.SqlStringGenerationContextImpl;
 import org.hibernate.boot.registry.StandardServiceRegistry;
 import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
+import org.hibernate.boot.spi.MetadataImplementor;
 import org.hibernate.cfg.AvailableSettings;
 import org.hibernate.dialect.DB2Dialect;
+import org.hibernate.generator.GeneratorCreationContext;
 import org.hibernate.id.enhanced.TableGenerator;
+import org.hibernate.mapping.PersistentClass;
+import org.hibernate.mapping.Property;
+import org.hibernate.mapping.RootClass;
 import org.hibernate.mapping.Table;
+import org.hibernate.service.ServiceRegistry;
 import org.hibernate.type.StandardBasicTypes;
+import org.hibernate.type.Type;
 
 import org.hibernate.testing.TestForIssue;
 import org.hibernate.testing.util.ServiceRegistryUtil;
+import org.hibernate.testing.util.uuid.IdGeneratorCreationContext;
 import org.junit.jupiter.api.Test;
 
 import static org.hamcrest.Matchers.containsString;
@@ -38,19 +46,58 @@ public class Db2GenerationTest {
 				.build();
 
 		try {
-			final Metadata metadata = new MetadataSources( ssr ).buildMetadata();
+			final MetadataImplementor metadata = (MetadataImplementor) new MetadataSources( ssr ).buildMetadata();
 
 			assertEquals( 0, metadata.getDatabase().getDefaultNamespace().getTables().size() );
 
 			final TableGenerator generator = new TableGenerator();
 
 			generator.configure(
-					metadata.getDatabase()
+					new GeneratorCreationContext() {
-							.getTypeConfiguration()
+						@Override
-							.getBasicTypeRegistry()
+						public Database getDatabase() {
-							.resolve( StandardBasicTypes.INTEGER ),
+							return metadata.getDatabase();
-					new Properties(),
+						}
-					ssr
+
+						@Override
+						public ServiceRegistry getServiceRegistry() {
+							return ssr;
+						}
+
+						@Override
+						public String getDefaultCatalog() {
+							return "";
+						}
+
+						@Override
+						public String getDefaultSchema() {
+							return "";
+						}
+
+						@Override
+						public PersistentClass getPersistentClass() {
+							return null;
+						}
+
+						@Override
+						public RootClass getRootClass() {
+							return null;
+						}
+
+						@Override
+						public Property getProperty() {
+							return null;
+						}
+
+						@Override
+						public Type getType() {
+							return metadata.getDatabase()
+									.getTypeConfiguration()
+									.getBasicTypeRegistry()
+									.resolve( StandardBasicTypes.INTEGER );
+						}
+					},
+					new Properties()
 			);
 
 			generator.registerExportables( metadata.getDatabase() );

hibernate-core/src/test/java/org/hibernate/orm/test/idgen/userdefined/NativeGenerator.java

@@ -53,9 +53,9 @@ public class NativeGenerator
     }
 
     @Override
-    public void configure(Type type, Properties parameters, ServiceRegistry serviceRegistry) {
+    public void configure(GeneratorCreationContext creationContext, Properties parameters) {
         if ( generator instanceof Configurable ) {
-            ((Configurable) generator).configure( type, parameters, serviceRegistry );
+            ((Configurable) generator).configure( creationContext, parameters );
         }
     }
 

migration-guide.adoc

@@ -240,6 +240,10 @@ specify a name for JNDI binding.  The new behavior is as follows (assuming `hibe
 Hibernate can use the persistence-unit name for binding into JNDI as well, but `hibernate.session_factory_name_is_jndi`
 must be explicitly set to true.
 
+[[configurable-generators]]
+== Configurable generators
+
+The signature of the `Configurable#configure` method changed from accepting just a `ServiceRegistry` instance to the new `GeneratorCreationContext` interface, which exposes a lot more useful information when configuring the generator itself. The old signature has been deprecated for removal, so you should migrate any custom `Configurable` generator implementation to the new one.
 
 [[hbm-transform]]
 == hbm.xml Transformation