HHH-10291 - Fix Partially generated composite attribute is not retrieved after insert

hibernate-core/src/main/java/org/hibernate/persister/entity/AbstractEntityPersister.java

@@ -121,6 +121,7 @@ import org.hibernate.tuple.entity.EntityMetamodel;
 import org.hibernate.tuple.entity.EntityTuplizer;
 import org.hibernate.type.AssociationType;
 import org.hibernate.type.CollectionType;
+import org.hibernate.type.ComponentType;
 import org.hibernate.type.CompositeType;
 import org.hibernate.type.EntityType;
 import org.hibernate.type.Type;
@@ -4752,8 +4753,7 @@ public abstract class AbstractEntityPersister
 					int propertyIndex = -1;
 					for ( NonIdentifierAttribute attribute : entityMetamodel.getProperties() ) {
 						propertyIndex++;
-						final ValueGeneration valueGeneration = attribute.getValueGenerationStrategy();
+						if ( isValueGenerationRequired( attribute, matchTiming ) ) {
-						if ( isReadRequired( valueGeneration, matchTiming ) ) {
 							final Object hydratedState = attribute.getType().hydrate(
 									rs, getPropertyAliases(
 											"",
@@ -4764,6 +4764,7 @@ public abstract class AbstractEntityPersister
 							setPropertyValue( entity, propertyIndex, state[propertyIndex] );
 						}
 					}
+
 //					for ( int i = 0; i < getPropertySpan(); i++ ) {
 //						if ( includeds[i] != ValueInclusion.NONE ) {
 //							Object hydratedState = getPropertyTypes()[i].hydrate( rs, getPropertyAliases( "", i ), session, entity );
@@ -4793,6 +4794,22 @@ public abstract class AbstractEntityPersister
 
 	}
 
+	private boolean isValueGenerationRequired(NonIdentifierAttribute attribute, GenerationTiming matchTiming) {
+		if ( attribute.getType() instanceof ComponentType ) {
+			final ComponentType type = (ComponentType) attribute.getType();
+			final ValueGeneration[] propertyValueGenerationStrategies = type.getPropertyValueGenerationStrategies();
+			for ( int i = 0; i < propertyValueGenerationStrategies.length; i++ ) {
+				if ( isReadRequired( propertyValueGenerationStrategies[i], matchTiming ) ) {
+					return true;
+				}
+			}
+			return false;
+		}
+		else {
+			return isReadRequired( attribute.getValueGenerationStrategy(), matchTiming );
+		}
+	}
+
 	/**
 	 * Whether the given value generation strategy requires to read the value from the database or not.
 	 */

hibernate-core/src/main/java/org/hibernate/tuple/ValueGeneration.java

@@ -6,12 +6,14 @@
  */
 package org.hibernate.tuple;
 
+import java.io.Serializable;
+
 /**
  * Describes the generation of property values.
  *
  * @author Steve Ebersole
  */
-public interface ValueGeneration {
+public interface ValueGeneration extends Serializable {
 	/**
 	 * When is this value generated : NEVER, INSERT, ALWAYS (INSERT+UPDATE)
 	 *

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

@@ -28,6 +28,7 @@ import org.hibernate.engine.spi.SessionImplementor;
 import org.hibernate.internal.util.StringHelper;
 import org.hibernate.internal.util.collections.ArrayHelper;
 import org.hibernate.tuple.StandardProperty;
+import org.hibernate.tuple.ValueGeneration;
 import org.hibernate.tuple.component.ComponentMetamodel;
 import org.hibernate.tuple.component.ComponentTuplizer;
 
@@ -41,6 +42,7 @@ public class ComponentType extends AbstractType implements CompositeType, Proced
 	private final TypeFactory.TypeScope typeScope;
 	private final String[] propertyNames;
 	private final Type[] propertyTypes;
+	private final ValueGeneration[] propertyValueGenerationStrategies;
 	private final boolean[] propertyNullability;
 	protected final int propertySpan;
 	private final CascadeStyle[] cascade;
@@ -58,6 +60,7 @@ public class ComponentType extends AbstractType implements CompositeType, Proced
 		this.propertySpan = metamodel.getPropertySpan();
 		this.propertyNames = new String[propertySpan];
 		this.propertyTypes = new Type[propertySpan];
+		this.propertyValueGenerationStrategies = new ValueGeneration[propertySpan];
 		this.propertyNullability = new boolean[propertySpan];
 		this.cascade = new CascadeStyle[propertySpan];
 		this.joinedFetch = new FetchMode[propertySpan];
@@ -72,6 +75,7 @@ public class ComponentType extends AbstractType implements CompositeType, Proced
 			if ( !prop.isNullable() ) {
 				hasNotNullProperty = true;
 			}
+			this.propertyValueGenerationStrategies[i] = prop.getValueGenerationStrategy();
 		}
 
 		this.entityMode = metamodel.getEntityMode();
@@ -448,6 +452,10 @@ public class ComponentType extends AbstractType implements CompositeType, Proced
 		return propertyTypes;
 	}
 
+	public ValueGeneration[] getPropertyValueGenerationStrategies() {
+		return propertyValueGenerationStrategies;
+	}
+
 	@Override
 	public String getName() {
 		return "component" + ArrayHelper.toString( propertyNames );