catch other cases where NPE indicates that a PostInitCallbackEntry is unready

hibernate-core/src/main/java/org/hibernate/dialect/temptable/TemporaryTable.java

@@ -31,6 +31,7 @@ import org.hibernate.mapping.Value;
 import org.hibernate.metamodel.mapping.EntityDiscriminatorMapping;
 import org.hibernate.metamodel.mapping.EntityIdentifierMapping;
 import org.hibernate.metamodel.mapping.EntityMappingType;
+import org.hibernate.metamodel.mapping.ForeignKeyDescriptor;
 import org.hibernate.metamodel.mapping.JdbcMapping;
 import org.hibernate.metamodel.mapping.ModelPart;
 import org.hibernate.metamodel.mapping.PluralAttributeMapping;
@@ -149,7 +150,16 @@ public class TemporaryTable implements Exportable, Contributable {
 
 									if ( pluralAttribute.getSeparateCollectionTable() != null ) {
 										// Ensure that the FK target columns are available
-										final ModelPart fkTarget = pluralAttribute.getKeyDescriptor().getTargetPart();
+										ForeignKeyDescriptor keyDescriptor = pluralAttribute.getKeyDescriptor();
+										if ( keyDescriptor==null ) {
+											// This is expected to happen when processing a
+											// PostInitCallbackEntry because the callbacks
+											// are not ordered. The exception is caught in
+											// MappingModelCreationProcess.executePostInitCallbacks()
+											// and the callback is re-queued.
+											throw new IllegalStateException( "Not yet ready: " + pluralAttribute );
+										}
+										final ModelPart fkTarget = keyDescriptor.getTargetPart();
 										if ( !( fkTarget instanceof EntityIdentifierMapping ) ) {
 											final Value value = entityBinding.getSubclassProperty( pluralAttribute.getAttributeName() )
 													.getValue();

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

@@ -38,6 +38,7 @@ import org.hibernate.metamodel.mapping.AttributeMapping;
 import org.hibernate.metamodel.mapping.EmbeddableMappingType;
 import org.hibernate.metamodel.mapping.EmbeddableValuedModelPart;
 import org.hibernate.metamodel.mapping.EntityMappingType;
+import org.hibernate.metamodel.mapping.ForeignKeyDescriptor;
 import org.hibernate.metamodel.mapping.JdbcMapping;
 import org.hibernate.metamodel.mapping.ManagedMappingType;
 import org.hibernate.metamodel.mapping.ModelPart;
@@ -195,6 +196,15 @@ public class EmbeddableMappingTypeImpl extends AbstractEmbeddableMapping impleme
 						}
 						else if ( attributeMapping instanceof ToOneAttributeMapping ) {
 							final ToOneAttributeMapping original = (ToOneAttributeMapping) attributeMapping;
+							ForeignKeyDescriptor foreignKeyDescriptor = original.getForeignKeyDescriptor();
+							if ( foreignKeyDescriptor==null ) {
+								// This is expected to happen when processing a
+								// PostInitCallbackEntry because the callbacks
+								// are not ordered. The exception is caught in
+								// MappingModelCreationProcess.executePostInitCallbacks()
+								// and the callback is re-queued.
+								throw new IllegalStateException( "Not yet ready: " + original );
+							}
 							final ToOneAttributeMapping toOne = original.copy(
 									declaringType,
 									declaringTableGroupProducer
@@ -204,7 +214,7 @@ public class EmbeddableMappingTypeImpl extends AbstractEmbeddableMapping impleme
 									selectableMappings.getSelectable( offset ).getContainingTableExpression()
 							);
 							toOne.setForeignKeyDescriptor(
-									original.getForeignKeyDescriptor().withKeySelectionMapping(
+									foreignKeyDescriptor.withKeySelectionMapping(
 											declaringType,
 											declaringTableGroupProducer,
 											index -> selectableMappings.getSelectable( offset + index ),
@@ -704,7 +714,7 @@ public class EmbeddableMappingTypeImpl extends AbstractEmbeddableMapping impleme
 			// are not ordered. The exception is caught in
 			// MappingModelCreationProcess.executePostInitCallbacks()
 			// and the callback is re-queued.
-			throw new IllegalStateException("not yet ready");
+			throw new IllegalStateException("Not yet ready");
 		}
 		return selectableMappings;
 	}

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

@@ -213,7 +213,12 @@ public class EntityCollectionPart
 							.getAssociatedEntityPersister( creationProcess.getCreationContext().getSessionFactory() );
 					fkTargetModelPart = elementPersister.findByPath( mapKeyPropertyName );
 					if ( fkTargetModelPart == null ) {
-						throw new RuntimeException( "Couldn't find model part for path [" + mapKeyPropertyName + "] on entity: " + elementPersister.getEntityName() );
+						// This is expected to happen when processing a
+						// PostInitCallbackEntry because the callbacks
+						// are not ordered. The exception is caught in
+						// MappingModelCreationProcess.executePostInitCallbacks()
+						// and the callback is re-queued.
+						throw new IllegalStateException( "Couldn't find model part for path [" + mapKeyPropertyName + "] on entity: " + elementPersister.getEntityName() );
 					}
 				}
 			}
@@ -222,7 +227,12 @@ public class EntityCollectionPart
 				if ( collectionDescriptor.isOneToMany() && mappedByProperty != null && !mappedByProperty.isEmpty() ) {
 					fkTargetModelPart = entityMappingType.findByPath( mappedByProperty );
 					if ( fkTargetModelPart == null ) {
-						throw new RuntimeException( "Couldn't find model part for path [" + mappedByProperty + "] on entity: " + entityMappingType.getEntityName() );
+						// This is expected to happen when processing a
+						// PostInitCallbackEntry because the callbacks
+						// are not ordered. The exception is caught in
+						// MappingModelCreationProcess.executePostInitCallbacks()
+						// and the callback is re-queued.
+						throw new IllegalStateException( "Couldn't find model part for path [" + mappedByProperty + "] on entity: " + entityMappingType.getEntityName() );
 					}
 				}
 				else {
@@ -261,7 +271,7 @@ public class EntityCollectionPart
 		if ( fkTargetModelPart instanceof ToOneAttributeMapping ) {
 			final ToOneAttributeMapping toOneAttributeMapping = (ToOneAttributeMapping) fkTargetModelPart;
 			if ( toOneAttributeMapping.getForeignKeyDescriptor() == null ) {
-				throw new RuntimeException( "Not yet ready: " + toOneAttributeMapping );
+				throw new IllegalStateException( "Not yet ready: " + toOneAttributeMapping );
 			}
 			return toOneAttributeMapping.getForeignKeyDescriptor();
 		}

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

@@ -149,32 +149,44 @@ public class VirtualIdEmbeddable extends AbstractEmbeddableMapping implements Id
 
 	@Override
 	public SelectableMapping getSelectable(int columnIndex) {
-		return selectableMappings.getSelectable( columnIndex );
+		return getSelectableMappings().getSelectable( columnIndex );
 	}
 
 	@Override
 	public int forEachSelectable(SelectableConsumer consumer) {
-		return selectableMappings.forEachSelectable( 0, consumer );
+		return getSelectableMappings().forEachSelectable( 0, consumer );
 	}
 
 	@Override
 	public int forEachSelectable(int offset, SelectableConsumer consumer) {
-		return selectableMappings.forEachSelectable( offset, consumer );
+		return getSelectableMappings().forEachSelectable( offset, consumer );
 	}
 
 	@Override
 	public int getJdbcTypeCount() {
-		return selectableMappings.getJdbcTypeCount();
+		return getSelectableMappings().getJdbcTypeCount();
 	}
 
 	@Override
 	public List<JdbcMapping> getJdbcMappings() {
-		return selectableMappings.getJdbcMappings();
+		return getSelectableMappings().getJdbcMappings();
+	}
+
+	private SelectableMappings getSelectableMappings() {
+		if (selectableMappings == null) {
+			// This is expected to happen when processing a
+			// PostInitCallbackEntry because the callbacks
+			// are not ordered. The exception is caught in
+			// MappingModelCreationProcess.executePostInitCallbacks()
+			// and the callback is re-queued.
+			throw new IllegalStateException("Not yet ready");
+		}
+		return selectableMappings;
 	}
 
 	@Override
 	public int forEachJdbcType(int offset, IndexedConsumer<JdbcMapping> action) {
-		return selectableMappings.forEachSelectable(
+		return getSelectableMappings().forEachSelectable(
 				offset,
 				(index, selectable) -> action.accept( index, selectable.getJdbcMapping() )
 		);