HHH-18729 - Allow custom strategy for implicit discriminator-value de…

…termination for ANY

- allow opting into use of short-name
- potentially look at allowing an "implicit value mapper" later

hibernate-core/src/main/java/org/hibernate/annotations/AnyDiscriminator.java

@@ -54,4 +54,10 @@
 	 * @since 7.0
 	 */
 	AnyDiscriminatorValueStrategy valueStrategy() default AUTO;
+
+	/**
+	 * Whether the entity's short-name should be used as the discriminator value
+	 * (as opposed to its full-name) in the case of implicit value mapping.
+	 */
+	boolean implicitEntityShortName() default false;
 }

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

@@ -111,6 +111,7 @@ private static void bindAny(
 		final AnyDiscriminator anyDiscriminator = property.getDirectAnnotationUsage( AnyDiscriminator.class );
 		if ( anyDiscriminator != null ) {
 			value.setDiscriminatorValueStrategy( anyDiscriminator.valueStrategy() );
+			value.setImplicitEntityShortName( anyDiscriminator.implicitEntityShortName() );
 		}
 
 		final PropertyBinder binder = new PropertyBinder();

hibernate-core/src/main/java/org/hibernate/boot/models/annotations/internal/AnyDiscriminatorAnnotation.java

@@ -16,13 +16,15 @@
 public class AnyDiscriminatorAnnotation implements AnyDiscriminator {
 	private jakarta.persistence.DiscriminatorType value;
 	private AnyDiscriminatorValueStrategy valueStrategy;
+	private boolean implicitEntityShortName;
 
 	/**
 	 * Used in creating dynamic annotation instances (e.g. from XML)
 	 */
 	public AnyDiscriminatorAnnotation(SourceModelBuildingContext modelContext) {
 		this.value = jakarta.persistence.DiscriminatorType.STRING;
 		this.valueStrategy = AnyDiscriminatorValueStrategy.AUTO;
+		this.implicitEntityShortName = false;
 	}
 
 	/**
@@ -31,13 +33,16 @@ public AnyDiscriminatorAnnotation(SourceModelBuildingContext modelContext) {
 	public AnyDiscriminatorAnnotation(AnyDiscriminator annotation, SourceModelBuildingContext modelContext) {
 		this.value = annotation.value();
 		this.valueStrategy = annotation.valueStrategy();
+		this.implicitEntityShortName = annotation.implicitEntityShortName();
 	}
 
 	/**
 	 * Used in creating annotation instances from Jandex variant
 	 */
 	public AnyDiscriminatorAnnotation(Map<String, Object> attributeValues, SourceModelBuildingContext modelContext) {
 		this.value = (jakarta.persistence.DiscriminatorType) attributeValues.get( "value" );
+		this.valueStrategy = (AnyDiscriminatorValueStrategy) attributeValues.get( "valueStrategy" );
+		this.implicitEntityShortName = (boolean) attributeValues.get( "implicitEntityShortName" );
 	}
 
 	@Override
@@ -63,5 +68,12 @@ public void valueStrategy(AnyDiscriminatorValueStrategy valueStrategy) {
 		this.valueStrategy = valueStrategy;
 	}
 
+	@Override
+	public boolean implicitEntityShortName() {
+		return implicitEntityShortName;
+	}
 
+	public void implicitEntityShortName(boolean implicitEntityShortName) {
+		this.implicitEntityShortName = implicitEntityShortName;
+	}
 }

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

@@ -4,19 +4,19 @@
  */
 package org.hibernate.mapping;
 
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Objects;
-import java.util.function.Consumer;
-
 import org.hibernate.Incubating;
 import org.hibernate.MappingException;
 import org.hibernate.boot.spi.MetadataBuildingContext;
 import org.hibernate.engine.jdbc.spi.JdbcServices;
 import org.hibernate.type.AnyDiscriminatorValueStrategy;
 import org.hibernate.type.AnyType;
-import org.hibernate.type.Type;
 import org.hibernate.type.MappingContext;
+import org.hibernate.type.Type;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Consumer;
 
 /**
  * A mapping model object representing a {@linkplain org.hibernate.annotations.Any polymorphic association}
@@ -36,6 +36,7 @@ public class Any extends SimpleValue {
 	// common
 	private Map<Object,String> metaValueToEntityNameMap;
 	private AnyDiscriminatorValueStrategy discriminatorValueStrategy = AnyDiscriminatorValueStrategy.AUTO;
+	private boolean implicitEntityShortName = false;
 	private boolean lazy = true;
 
 	private AnyType resolvedType;
@@ -132,25 +133,24 @@ public void setIdentifierType(String identifierType) {
 	}
 
 	/**
-	 * Current strategy for interpreting {@linkplain org.hibernate.annotations.AnyDiscriminatorValue} definitions,
-	 * especially in terms of implicit, explicit and potentially missing values.
+	 * Set the strategy for interpreting {@linkplain org.hibernate.annotations.AnyDiscriminatorValue}
+	 * definitions in terms of implicit, explicit and potentially missing values.
 	 *
 	 * @since 7.0
 	 */
 	@Incubating
-	public AnyDiscriminatorValueStrategy getDiscriminatorValueStrategy() {
-		return discriminatorValueStrategy;
+	public void setDiscriminatorValueStrategy(AnyDiscriminatorValueStrategy discriminatorValueStrategy) {
+		this.discriminatorValueStrategy = discriminatorValueStrategy;
 	}
 
 	/**
-	 * Set the strategy
+	 * Set whether to use the entity's short-name for implicit discriminator value mappings
 	 *
-	 * @see #getDiscriminatorValueStrategy
 	 * @since 7.0
 	 */
 	@Incubating
-	public void setDiscriminatorValueStrategy(AnyDiscriminatorValueStrategy discriminatorValueStrategy) {
-		this.discriminatorValueStrategy = discriminatorValueStrategy;
+	public void setImplicitEntityShortName(boolean implicitEntityShortName) {
+		this.implicitEntityShortName = implicitEntityShortName;
 	}
 
 	@Override
@@ -176,6 +176,7 @@ public AnyType getType() throws MappingException {
 					discriminatorType,
 					identifierType,
 					discriminatorValueStrategy,
+					implicitEntityShortName,
 					metaValueToEntityNameMap,
 					isLazy(),
 					getBuildingContext()

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

@@ -129,17 +129,26 @@ public static AnyType anyMapping(
 			Map<Object, String> explicitValeMappings,
 			boolean lazy,
 			MetadataBuildingContext buildingContext) {
-		return anyMapping( discriminatorType, identifierType, AnyDiscriminatorValueStrategy.AUTO, explicitValeMappings, lazy, buildingContext );
+		return anyMapping(
+				discriminatorType,
+				identifierType,
+				AnyDiscriminatorValueStrategy.AUTO,
+				false,
+				explicitValeMappings,
+				lazy,
+				buildingContext
+		);
 	}
 
 	public static AnyType anyMapping(
 			Type discriminatorType,
 			Type identifierType,
 			AnyDiscriminatorValueStrategy discriminatorValueStrategy,
+			boolean implicitEntityShortName,
 			Map<Object, String> explicitValeMappings,
 			boolean lazy,
 			MetadataBuildingContext buildingContext) {
-		final MetaType metaType = new MetaType( discriminatorType, discriminatorValueStrategy, explicitValeMappings );
+		final MetaType metaType = new MetaType( discriminatorType, discriminatorValueStrategy, implicitEntityShortName, explicitValeMappings );
 		return new AnyType( buildingContext.getBootstrapContext().getTypeConfiguration(), metaType, identifierType, lazy );
 	}
 

hibernate-core/src/main/java/org/hibernate/metamodel/mapping/DiscriminatorConverter.java

@@ -90,7 +90,7 @@ public R toRelationalValue(O domainForm) {
 		return (R) discriminatorValueDetails.getValue();
 	}
 
-	public abstract DiscriminatorValueDetails getDetailsForDiscriminatorValue(Object relationalForm);
+	public abstract DiscriminatorValueDetails getDetailsForDiscriminatorValue(Object relationalValue);
 
 	public abstract DiscriminatorValueDetails getDetailsForEntityName(String entityName);
 

hibernate-core/src/main/java/org/hibernate/metamodel/mapping/EmbeddableDiscriminatorConverter.java

@@ -86,13 +86,13 @@ public O toDomainValue(R relationalForm) {
 	}
 
 	@Override
-	public EmbeddableDiscriminatorValueDetailsImpl getDetailsForDiscriminatorValue(Object value) {
-		final EmbeddableDiscriminatorValueDetailsImpl valueMatch = discriminatorValueToDetailsMap.get( value );
+	public EmbeddableDiscriminatorValueDetailsImpl getDetailsForDiscriminatorValue(Object relationalValue) {
+		final EmbeddableDiscriminatorValueDetailsImpl valueMatch = discriminatorValueToDetailsMap.get( relationalValue );
 		if ( valueMatch != null ) {
 			return valueMatch;
 		}
 
-		throw new HibernateException( "Unrecognized discriminator value: " + value );
+		throw new HibernateException( "Unrecognized discriminator value: " + relationalValue );
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/AnyDiscriminatorPart.java

@@ -85,6 +85,7 @@ public AnyDiscriminatorPart(
 			BasicType<?> underlyingJdbcMapping,
 			Map<Object,String> valueToEntityNameMap,
 			AnyDiscriminatorValueStrategy valueStrategy,
+			boolean implicitEntityShortName,
 			MappingMetamodelImplementor mappingMetamodel) {
 		this.navigableRole = partRole;
 		this.declaringType = declaringType;
@@ -106,6 +107,7 @@ public AnyDiscriminatorPart(
 				underlyingJdbcMapping,
 				valueToEntityNameMap,
 				valueStrategy,
+				implicitEntityShortName,
 				mappingMetamodel
 		);
 	}
@@ -115,6 +117,7 @@ public AnyDiscriminatorPart(
 			BasicType<?> underlyingJdbcMapping,
 			Map<Object, String> valueToEntityNameMap,
 			AnyDiscriminatorValueStrategy valueStrategy,
+			boolean implicitEntityShortName,
 			MappingMetamodelImplementor mappingMetamodel) {
 		if ( valueStrategy == AnyDiscriminatorValueStrategy.AUTO ) {
 			if ( valueToEntityNameMap == null || valueToEntityNameMap.isEmpty() ) {
@@ -132,6 +135,7 @@ public AnyDiscriminatorPart(
 					ClassJavaType.INSTANCE,
 					underlyingJdbcMapping.getJavaTypeDescriptor(),
 					valueToEntityNameMap,
+					implicitEntityShortName,
 					mappingMetamodel
 			);
 			case EXPLICIT -> new ExplicitDiscriminatorConverter<>(
@@ -146,6 +150,7 @@ public AnyDiscriminatorPart(
 					ClassJavaType.INSTANCE,
 					underlyingJdbcMapping.getJavaTypeDescriptor(),
 					valueToEntityNameMap,
+					implicitEntityShortName,
 					mappingMetamodel
 			);
 		};

hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/DiscriminatedAssociationMapping.java

@@ -90,6 +90,7 @@ public static DiscriminatedAssociationMapping from(
 				(BasicType<?>) metaType.getBaseType(),
 				metaType.getDiscriminatorValuesToEntityNameMap(),
 				metaType.getValueStrategy(),
+				metaType.isImplicitEntityShortName(),
 				creationProcess.getCreationContext().getSessionFactory().getMappingMetamodel()
 		);
 

hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/ExplicitDiscriminatorConverter.java

@@ -54,7 +54,8 @@ public ExplicitDiscriminatorConverter(
 		this.detailsByEntityName = CollectionHelper.concurrentMap( explicitValueMappings.size() );
 
 		explicitValueMappings.forEach( (value, entityName) -> {
-			final EntityPersister entityDescriptor = mappingMetamodel.getEntityDescriptor( entityName );
+			final String importedEntityName = mappingMetamodel.getImportedName( entityName );
+			final EntityPersister entityDescriptor = mappingMetamodel.getEntityDescriptor( importedEntityName );
 			final DiscriminatorValueDetails details = new DiscriminatorValueDetailsImpl( value, entityDescriptor );
 			detailsByValue.put( value, details );
 			detailsByEntityName.put( entityDescriptor.getEntityName(), details );
@@ -75,12 +76,12 @@ public Map<String, DiscriminatorValueDetails> getDetailsByEntityName() {
 	}
 
 	@Override
-	public DiscriminatorValueDetails getDetailsForDiscriminatorValue(Object relationalForm) {
-		if ( relationalForm == null ) {
+	public DiscriminatorValueDetails getDetailsForDiscriminatorValue(Object relationalValue) {
+		if ( relationalValue == null ) {
 			return detailsByValue.get( NULL_DISCRIMINATOR );
 		}
 
-		final DiscriminatorValueDetails existing = detailsByValue.get( relationalForm );
+		final DiscriminatorValueDetails existing = detailsByValue.get( relationalValue );
 		if ( existing != null ) {
 			// an explicit or previously-resolved mapping
 			return existing;
@@ -91,16 +92,16 @@ public DiscriminatorValueDetails getDetailsForDiscriminatorValue(Object relation
 			return notNullMatch;
 		}
 
-		if ( relationalForm.getClass().isEnum() ) {
+		if ( relationalValue.getClass().isEnum() ) {
 			final Object enumValue;
 			if ( getRelationalJavaType() instanceof StringJavaType ) {
-				enumValue = ( (Enum<?>) relationalForm ).name();
+				enumValue = ( (Enum<?>) relationalValue).name();
 			}
 			else if ( getRelationalJavaType() instanceof CharacterJavaType ) {
-				enumValue = ( (Enum<?>) relationalForm ).name().charAt( 0 );
+				enumValue = ( (Enum<?>) relationalValue).name().charAt( 0 );
 			}
 			else {
-				enumValue = ( (Enum<?>) relationalForm ).ordinal();
+				enumValue = ( (Enum<?>) relationalValue).ordinal();
 			}
 			final DiscriminatorValueDetails enumMatch = detailsByValue.get( enumValue );
 			if ( enumMatch != null ) {
@@ -112,7 +113,7 @@ else if ( getRelationalJavaType() instanceof CharacterJavaType ) {
 				ROOT,
 				"Unknown discriminator value (%s) : %s",
 				discriminatorRole,
-				relationalForm
+				relationalValue
 		) );
 	}
 

hibernate-core/src/main/java/org/hibernate/metamodel/mapping/internal/ImplicitDiscriminatorConverter.java

@@ -26,6 +26,7 @@
  */
 public class ImplicitDiscriminatorConverter<O,R> extends DiscriminatorConverter<O,R> {
 	private final NavigableRole discriminatorRole;
+	private final boolean implicitEntityShortName;
 	private final MappingMetamodelImplementor mappingMetamodel;
 	private final Map<Object, DiscriminatorValueDetails> detailsByValue;
 	private final Map<String,DiscriminatorValueDetails> detailsByEntityName;
@@ -35,9 +36,11 @@ public ImplicitDiscriminatorConverter(
 			JavaType<O> domainJavaType,
 			JavaType<R> relationalJavaType,
 			Map<Object,String> explicitValueMappings,
+			boolean implicitEntityShortName,
 			MappingMetamodelImplementor mappingMetamodel) {
 		super( discriminatorRole.getFullPath(), domainJavaType, relationalJavaType );
 		this.discriminatorRole = discriminatorRole;
+		this.implicitEntityShortName = implicitEntityShortName;
 		this.mappingMetamodel = mappingMetamodel;
 
 		if ( CollectionHelper.isNotEmpty( explicitValueMappings ) ) {
@@ -66,22 +69,47 @@ public Map<String, DiscriminatorValueDetails> getDetailsByEntityName() {
 	}
 
 	@Override
-	public DiscriminatorValueDetails getDetailsForDiscriminatorValue(Object value) {
-		if ( value instanceof String incoming ) {
-			final DiscriminatorValueDetails existingDetails = detailsByValue.get( incoming );
-			if ( existingDetails != null ) {
-				return existingDetails;
+	public DiscriminatorValueDetails getDetailsForDiscriminatorValue(Object relationalValue) {
+		// entity-name : org.hibernate.Thing
+		// short-name : Thing
+
+		// in the case of full entity-name handling, we'd have
+		// 		detailsByValue["org.hibernate.Thing", DiscriminatorValueDetails( "org.hibernate.Thing", ... )]
+		//		detailsByEntityName["org.hibernate.Thing", DiscriminatorValueDetails( "org.hibernate.Thing", ... )]
+
+		// in the case of short-name "Thing", we'd have
+		// 		detailsByValue["Thing", DiscriminatorValueDetails( "Thing", ... )]
+		//		detailsByEntityName["org.hibernate.Thing", DiscriminatorValueDetails( "Thing", ... )]
+
+		final DiscriminatorValueDetails existing = detailsByValue.get( relationalValue );
+		if ( existing != null ) {
+			return existing;
+		}
+
+		if ( relationalValue instanceof String incoming ) {
+			final EntityPersister persister;
+			if ( implicitEntityShortName ) {
+				// incoming - "Thing"
+				// importedName - "org.hibernate.Thing"
+				final String importedName = mappingMetamodel.getImportedName( incoming );
+				persister = mappingMetamodel.findEntityDescriptor( importedName );
+			}
+			else {
+				// incoming - "org.hibernate.Thing"
+				// importedName - "org.hibernate.Thing"
+				persister = mappingMetamodel.findEntityDescriptor( incoming );
 			}
-			final EntityPersister persister = mappingMetamodel.findEntityDescriptor( incoming );
+
 			if ( persister != null ) {
 				return register( incoming, persister );
 			}
 		}
+
 		throw new HibernateException( String.format(
 				ROOT,
-				"Unrecognized discriminator value (%s): %s",
+				"Unrecognized discriminator relationalValue (%s): %s",
 				discriminatorRole.getFullPath(),
-				value
+				relationalValue
 		) );
 	}
 
@@ -94,14 +122,19 @@ private DiscriminatorValueDetails register(Object value, EntityPersister entityD
 
 	@Override
 	public DiscriminatorValueDetails getDetailsForEntityName(String entityName) {
+		// entityName - "org.hibernate.Thing"
+
 		final DiscriminatorValueDetails existingDetails = detailsByEntityName.get( entityName );
 		if ( existingDetails != null ) {
 			return existingDetails;
 		}
+
 		final EntityPersister persister = mappingMetamodel.findEntityDescriptor( entityName );
 		if ( persister!= null ) {
-			return register( persister.getEntityName(), persister );
+			final String implicitValue = implicitEntityShortName ? persister.getImportedName() : persister.getEntityName();
+			return register( implicitValue, persister );
 		}
+
 		throw new HibernateException( String.format(
 				ROOT,
 				"Unrecognized entity name (%s): %s",