HHH-17290 Embeddable with a primitive field cannot be set to null

Author: dreab8

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

@@ -881,8 +881,7 @@ private static AnnotatedColumns buildImplicitColumn(
 //		}
 		//not following the spec but more clean
 		if ( nullability != Nullability.FORCED_NULL
-				&& inferredData.getClassOrElement().isPrimitive()
-				&& !inferredData.getProperty().isArray() ) {
+				&& !PropertyBinder.isOptional( inferredData.getProperty(), propertyHolder ) ) {
 			column.setNullable( false );
 		}
 		final String propertyName = inferredData.getPropertyName();

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

@@ -451,7 +451,7 @@ private void handleMutability(Property property) {
 
 	private void handleOptional(Property property) {
 		if ( this.property != null ) {
-			property.setOptional( !isId && isOptional( this.property ) );
+			property.setOptional( !isId && isOptional( this.property, this.holder ) );
 			if ( property.isOptional() ) {
 				final OptionalDeterminationSecondPass secondPass = persistentClasses -> {
 					// Defer determining whether a property and its columns are nullable,
@@ -1200,10 +1200,12 @@ private static boolean isExplicitlyOptional(XProperty property) {
 	 * Should this property be considered optional, taking into
 	 * account whether it is primitive?
 	 */
-	private static boolean isOptional(XProperty property) {
+	public static boolean isOptional(XProperty property, PropertyHolder propertyHolder) {
 		return property.isAnnotationPresent( Basic.class )
 				? property.getAnnotation( Basic.class ).optional()
-				: property.isArray() || !property.getClassOrElementClass().isPrimitive();
+				: property.isArray()
+				|| propertyHolder != null && propertyHolder.isComponent()
+				|| !property.getClassOrElementClass().isPrimitive();
 	}
 
 	private static boolean isLazy(XProperty property) {

hibernate-core/src/main/java/org/hibernate/type/ComponentType.java

@@ -533,7 +533,7 @@ public Object replace(
 			Object owner,
 			Map<Object, Object> copyCache) {
 
-		if ( original == null && target == null ) {
+		if ( original == null ) {
 			return null;
 		}
 		if ( compositeUserType != null ) {
@@ -570,7 +570,7 @@ public Object replace(
 			Map<Object, Object> copyCache,
 			ForeignKeyDirection foreignKeyDirection) {
 
-		if ( original == null && target == null ) {
+		if ( original == null ) {
 			return null;
 		}
 		if ( compositeUserType != null ) {