hibernate · gavinking · Jan 23, 2025 · Jan 21, 2025
diff --git a/hibernate-core/src/main/java/org/hibernate/boot/MetadataBuilder.java b/hibernate-core/src/main/java/org/hibernate/boot/MetadataBuilder.java
@@ -4,7 +4,6 @@
  */
 package org.hibernate.boot;
 
-import org.hibernate.Incubating;
 import org.hibernate.boot.archive.scan.spi.ScanEnvironment;
 import org.hibernate.boot.archive.scan.spi.ScanOptions;
 import org.hibernate.boot.archive.scan.spi.Scanner;
@@ -276,19 +275,6 @@ public interface MetadataBuilder {
 	 */
 	MetadataBuilder enableGlobalNationalizedCharacterDataSupport(boolean enabled);
 
-	/**
-	 * Specify whether missing {@link jakarta.persistence.MapsId} annotations
-	 * should be inferred.
-	 *
-	 * @param enabled {@code true} if missing {@code MapsId} should be inferred
-	 *
-	 * @return {@code this}, for method chaining
-	 *
-	 * @since 7.0
-	 */
-	@Incubating
-	MetadataBuilder enableMapsIdInference(boolean enabled);
-
 	/**
 	 * Specify an additional or overridden basic type mapping.
 	 *

diff --git a/hibernate-core/src/main/java/org/hibernate/boot/internal/InFlightMetadataCollectorImpl.java b/hibernate-core/src/main/java/org/hibernate/boot/internal/InFlightMetadataCollectorImpl.java
@@ -1372,16 +1372,6 @@ public void addPropertyAnnotatedWithMapsId(ClassDetails entityType, PropertyData
 				.put( property.getAttributeMember().getDirectAnnotationUsage( MapsId.class ).value(), property );
 	}
 
-	@Override
-	public void addInferredMapsIdProperty(ClassDetails entityType, PropertyData property, String mapsIdValue) {
-		if ( propertiesAnnotatedWithMapsId == null ) {
-			propertiesAnnotatedWithMapsId = new HashMap<>();
-		}
-
-		propertiesAnnotatedWithMapsId.computeIfAbsent( entityType, k -> new HashMap<>() )
-				.put( mapsIdValue, property );
-	}
-
 	@Override
 	public PropertyData getPropertyAnnotatedWithIdAndToOne(ClassDetails entityType, String propertyName) {
 		if ( propertiesAnnotatedWithIdAndToOne == null ) {

diff --git a/hibernate-core/src/main/java/org/hibernate/boot/internal/MetadataBuilderImpl.java b/hibernate-core/src/main/java/org/hibernate/boot/internal/MetadataBuilderImpl.java
@@ -343,11 +343,6 @@ public MetadataBuilder applyTempClassLoader(ClassLoader tempClassLoader) {
 		return this;
 	}
 
-	public MetadataBuilder enableMapsIdInference(boolean enabled) {
-		options.mapsIdInferenceEnabled = enabled;
-		return this;
-	}
-
 	public MetadataBuilder noConstraintByDefault() {
 		options.noConstraintByDefault = true;
 		return this;
@@ -644,7 +639,6 @@ public static class MetadataBuildingOptionsImpl
 		private boolean implicitDiscriminatorsForJoinedInheritanceSupported;
 		private boolean implicitlyForceDiscriminatorInSelect;
 		private boolean useNationalizedCharacterData;
-		private boolean mapsIdInferenceEnabled;
 		private boolean noConstraintByDefault;
 
 		private final String schemaCharset;
@@ -735,12 +729,6 @@ else if ( value instanceof AccessType accessType ) {
 					regionFactory == null ? null : regionFactory.getDefaultAccessType()
 			);
 
-			mapsIdInferenceEnabled = configService.getSetting(
-					"hibernate.enable_mapsid_inference",
-					BOOLEAN,
-					false
-			);
-
 			noConstraintByDefault = ConstraintMode.NO_CONSTRAINT.name().equalsIgnoreCase( configService.getSetting(
 					AvailableSettings.HBM2DDL_DEFAULT_CONSTRAINT_MODE,
 					String.class,
@@ -919,11 +907,6 @@ public boolean useNationalizedCharacterData() {
 			return useNationalizedCharacterData;
 		}
 
-		@Override
-		public boolean isMapsIdInferenceEnabled() {
-			return mapsIdInferenceEnabled;
-		}
-
 		@Override
 		public boolean isNoConstraintByDefault() {
 			return noConstraintByDefault;

diff --git a/hibernate-core/src/main/java/org/hibernate/boot/model/internal/PropertyBinder.java b/hibernate-core/src/main/java/org/hibernate/boot/model/internal/PropertyBinder.java
@@ -32,7 +32,6 @@
 import org.hibernate.annotations.OptimisticLock;
 import org.hibernate.annotations.Parent;
 import org.hibernate.binder.AttributeBinder;
-import org.hibernate.boot.models.JpaAnnotations;
 import org.hibernate.boot.spi.AccessType;
 import org.hibernate.boot.spi.InFlightMetadataCollector;
 import org.hibernate.boot.spi.MetadataBuildingContext;
@@ -67,11 +66,9 @@
 
 
 import jakarta.persistence.Basic;
-import jakarta.persistence.Column;
 import jakarta.persistence.ElementCollection;
 import jakarta.persistence.EmbeddedId;
 import jakarta.persistence.Id;
-import jakarta.persistence.JoinColumn;
 import jakarta.persistence.Lob;
 import jakarta.persistence.ManyToMany;
 import jakarta.persistence.ManyToOne;
@@ -623,7 +620,6 @@ private static int addProperty(
 		final MemberDetails element = propertyAnnotatedElement.getAttributeMember();
 		if ( hasIdAnnotation( element ) ) {
 			inFlightPropertyDataList.add( idPropertyCounter, propertyAnnotatedElement );
-			handleInferredMapsIdProperty( propertyContainer, context, declaringClass, ownerType, element );
 			if ( hasToOneAnnotation( element ) ) {
 				context.getMetadataCollector()
 						.addToOneAndIdProperty( ownerType.determineRawClass(), propertyAnnotatedElement );
@@ -653,65 +649,6 @@ private static void checkIdProperty(MemberDetails property, PropertyData propert
 		}
 	}
 
-	// The following code infers a "missing" @MapsId annotation when
-	// an @Id Column matches a @JoinColumn of another field. No test
-	// fails if I simply remove this code, and, indeed, it was broken
-	// and doing nothing before I got here. I've now "fixed" it to do
-	// what it was supposed to be doing, but honestly the semantics
-	// aren't clear: why should it be linked to the existence of an
-	// explicit @Column annotation? And there's still no test for it.
-	//
-	// The real work is done by ToOneBinder#handleInferredMapsId
-	private static void handleInferredMapsIdProperty(
-			PropertyContainer propertyContainer,
-			MetadataBuildingContext context,
-			ClassDetails declaringClass,
-			TypeVariableScope ownerType,
-			MemberDetails element) {
-		if ( context.getBuildingOptions().isMapsIdInferenceEnabled() ) {
-			//TODO support true/false/default on the property instead of present / not present
-			final SourceModelBuildingContext sourceModelContext =
-					context.getMetadataCollector().getSourceModelBuildingContext();
-			if ( element.hasDirectAnnotationUsage( Id.class )
-				//TODO Explicit @Column should not be mandatory here
-					&& element.hasDirectAnnotationUsage( Column.class ) ) {
-				final String columnName = element.getDirectAnnotationUsage( Column.class ).name();
-				declaringClass.forEachPersistableMember( memberDetails -> {
-					if ( !memberDetails.hasDirectAnnotationUsage( MapsId.class )
-							&& isJoinColumnPresent( columnName, memberDetails, sourceModelContext ) ) {
-						//create a PropertyData for the specJ property holding the mapping
-						context.getMetadataCollector().addInferredMapsIdProperty(
-								ownerType.determineRawClass(),
-								new PropertyInferredData(
-										declaringClass,
-										ownerType,
-										//same dec
-										memberDetails,
-										// the actual @XToOne property
-										propertyContainer.getClassLevelAccessType().getType(),
-										//TODO we should get the right accessor but the same as id would do
-										context
-								),
-								element.toString()
-						);
-					}
-				} );
-			}
-		}
-	}
-
-	private static boolean isJoinColumnPresent(String columnName, MemberDetails property, SourceModelBuildingContext modelContext) {
-		// The detection of a configured individual JoinColumn differs
-		// between Annotation and XML configuration processing.
-		for ( JoinColumn joinColumnAnnotation :
-				property.getRepeatedAnnotationUsages( JpaAnnotations.JOIN_COLUMN, modelContext ) ) {
-			if ( joinColumnAnnotation.name().equals( columnName ) ) {
-				return true;
-			}
-		}
-		return false;
-	}
-
 	static boolean hasIdAnnotation(MemberDetails element) {
 		return element.hasDirectAnnotationUsage( Id.class )
 			|| element.hasDirectAnnotationUsage( EmbeddedId.class );

diff --git a/hibernate-core/src/main/java/org/hibernate/boot/model/internal/ToOneBinder.java b/hibernate-core/src/main/java/org/hibernate/boot/model/internal/ToOneBinder.java
@@ -53,7 +53,6 @@
 import static org.hibernate.boot.model.internal.BinderHelper.noConstraint;
 import static org.hibernate.internal.CoreLogging.messageLogger;
 import static org.hibernate.internal.util.StringHelper.isBlank;
-import static org.hibernate.internal.util.StringHelper.isNotBlank;
 import static org.hibernate.internal.util.StringHelper.nullIfEmpty;
 import static org.hibernate.internal.util.StringHelper.qualify;
 
@@ -214,7 +213,6 @@ private static void bindManyToOne(
 			joinColumns.setMapsId( mapsId.value() );
 		}
 
-		final boolean hasInferredMapsId = handleInferredMapsId( joinColumns, inferredData, property, context );
 		value.setTypeName( inferredData.getClassOrElementName() );
 		final String propertyName = inferredData.getPropertyName();
 		value.setTypeUsingReflection( propertyHolder.getClassName(), propertyName );
@@ -244,7 +242,7 @@ private static void bindManyToOne(
 				joinColumns,
 				optional,
 				inferredData,
-				isIdentifierMapper || hasInferredMapsId,
+				isIdentifierMapper,
 				propertyBinder,
 				value,
 				property,
@@ -257,48 +255,6 @@ static boolean isTargetAnnotatedEntity(ClassDetails targetEntity, MemberDetails
 		return target.hasDirectAnnotationUsage( Entity.class );
 	}
 
-	// The following code infers a "missing" @MapsId annotation
-	// when an @Id Column matches a @JoinColumn of another field.
-	// There's also some related code for this case over in
-	// PropertyBinder#handleInferredMapsIdProperty
-	private static boolean handleInferredMapsId(
-			AnnotatedJoinColumns columns,
-			PropertyData propertyData,
-			MemberDetails property,
-			MetadataBuildingContext context) {
-		if ( context.getBuildingOptions().isMapsIdInferenceEnabled() ) {
-			//Make sure that JPA1 key-many-to-one columns are read only too
-			boolean hasInferredMapsId = false;
-			final JoinColumn joinColumn = property.getDirectAnnotationUsage( JoinColumn.class );
-			if ( joinColumn != null
-					&& property.hasDirectAnnotationUsage( ManyToOne.class )
-					&& !property.hasDirectAnnotationUsage( MapsId.class ) ) {
-				final String joinColumnName = joinColumn.name();
-				if ( isNotBlank( joinColumnName ) ) {
-					for ( MemberDetails member : propertyData.getDeclaringClass().getFields() ) {
-						if ( member.hasDirectAnnotationUsage( Id.class )
-							//TODO Explicit @Column should not be mandatory here
-								&& member.hasDirectAnnotationUsage( Column.class ) ) {
-							final String columnName = member.getDirectAnnotationUsage( Column.class ).name();
-							if ( joinColumnName.equals( columnName ) ) {
-								hasInferredMapsId = true;
-								for ( AnnotatedJoinColumn column : columns.getJoinColumns() ) {
-									column.setInsertable( false );
-									column.setUpdatable( false );
-								}
-							}
-						}
-					}
-				}
-
-			}
-			return hasInferredMapsId;
-		}
-		else {
-			return false;
-		}
-	}
-
 	private static void processManyToOneProperty(
 			String cascadeStrategy,
 			AnnotatedJoinColumns columns,

diff --git a/...re/src/main/java/org/hibernate/boot/spi/AbstractDelegatingMetadataBuilderImplementor.java b/...re/src/main/java/org/hibernate/boot/spi/AbstractDelegatingMetadataBuilderImplementor.java
@@ -149,12 +149,6 @@ public MetadataBuilder enableGlobalNationalizedCharacterDataSupport(boolean enab
 		return getThis();
 	}
 
-	@Override
-	public MetadataBuilder enableMapsIdInference(boolean enabled) {
-		delegate.enableMapsIdInference( enabled );
-		return getThis();
-	}
-
 	@Override
 	public MetadataBuilder applyBasicType(BasicType<?> type) {
 		delegate.applyBasicType( type );

diff --git a/...-core/src/main/java/org/hibernate/boot/spi/AbstractDelegatingMetadataBuildingOptions.java b/...-core/src/main/java/org/hibernate/boot/spi/AbstractDelegatingMetadataBuildingOptions.java
@@ -130,11 +130,6 @@ public boolean useNationalizedCharacterData() {
 		return delegate.useNationalizedCharacterData();
 	}
 
-	@Override
-	public boolean isMapsIdInferenceEnabled() {
-		return delegate.isMapsIdInferenceEnabled();
-	}
-
 	@Override
 	public boolean isNoConstraintByDefault() {
 		return delegate.isNoConstraintByDefault();

diff --git a/hibernate-core/src/main/java/org/hibernate/boot/spi/InFlightMetadataCollector.java b/hibernate-core/src/main/java/org/hibernate/boot/spi/InFlightMetadataCollector.java
@@ -330,7 +330,6 @@ void addTableNameBinding(
 
 	PropertyData getPropertyAnnotatedWithMapsId(ClassDetails persistentClassDetails, String propertyName);
 	void addPropertyAnnotatedWithMapsId(ClassDetails entityClassDetails, PropertyData propertyAnnotatedElement);
-	void addInferredMapsIdProperty(ClassDetails entityClassDetails, PropertyData specJPropertyData, String s);
 
 	void addToOneAndIdProperty(ClassDetails entityClassDetails, PropertyData propertyAnnotatedElement);
 	PropertyData getPropertyAnnotatedWithIdAndToOne(ClassDetails persistentClassDetails, String propertyName);

diff --git a/hibernate-core/src/main/java/org/hibernate/boot/spi/MetadataBuildingOptions.java b/hibernate-core/src/main/java/org/hibernate/boot/spi/MetadataBuildingOptions.java
@@ -205,12 +205,6 @@ default CollectionSemanticsResolver getPersistentCollectionRepresentationResolve
 	 */
 	boolean useNationalizedCharacterData();
 
-	/**
-	 * Do we attempt to infer missing {@link jakarta.persistence.MapsId}
-	 * annotations when they are not explicitly specified?
-	 */
-	boolean isMapsIdInferenceEnabled();
-
 	/**
 	 * Should we <em>disable</em> constraint creation when
 	 * {@link jakarta.persistence.ConstraintMode#PROVIDER_DEFAULT}?

diff --git a/...g/hibernate/orm/test/annotations/derivedidentities/e1/b/specjmapid/CustomerInventory.java b/...g/hibernate/orm/test/annotations/derivedidentities/e1/b/specjmapid/CustomerInventory.java
@@ -17,6 +17,7 @@
 import jakarta.persistence.IdClass;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
+import jakarta.persistence.MapsId;
 import jakarta.persistence.NamedQueries;
 import jakarta.persistence.NamedQuery;
 import jakarta.persistence.Table;
@@ -49,6 +50,7 @@ public class CustomerInventory implements Serializable, Comparator<CustomerInven
 
 	@ManyToOne(cascade = CascadeType.MERGE)
 	@JoinColumn(name = "CI_CUSTOMERID", nullable = false)
+	@MapsId("custId")
 	private Customer customer;
 
 	@ManyToOne(cascade = CascadeType.MERGE)

diff --git a/...rnate/orm/test/annotations/derivedidentities/e1/b/specjmapid/IdMapManyToOneSpecjTest.java b/...rnate/orm/test/annotations/derivedidentities/e1/b/specjmapid/IdMapManyToOneSpecjTest.java
@@ -9,7 +9,6 @@
 
 import org.hibernate.Session;
 import org.hibernate.Transaction;
-import org.hibernate.boot.MetadataBuilder;
 
 import org.hibernate.testing.junit4.BaseNonConfigCoreFunctionalTestCase;
 import org.junit.Test;
@@ -22,12 +21,6 @@
  */
 public class IdMapManyToOneSpecjTest extends BaseNonConfigCoreFunctionalTestCase {
 
-	@Override
-	protected void configureMetadataBuilder(MetadataBuilder metadataBuilder) {
-		super.configureMetadataBuilder( metadataBuilder );
-		metadataBuilder.enableMapsIdInference( true );
-	}
-
 	@Test
 	public void testComplexIdClass() {
 		Session s = openSession();

diff --git a/hibernate-testing/src/main/java/org/hibernate/testing/orm/junit/DialectFeatureChecks.java b/hibernate-testing/src/main/java/org/hibernate/testing/orm/junit/DialectFeatureChecks.java
@@ -1491,14 +1491,6 @@ public void addPropertyAnnotatedWithMapsId(
 
 		}
 
-		@Override
-		public void addInferredMapsIdProperty(
-				ClassDetails entityClassDetails,
-				PropertyData specJPropertyData,
-				String s) {
-
-		}
-
 		@Override
 		public void addToOneAndIdProperty(ClassDetails entityClassDetails, PropertyData propertyAnnotatedElement) {