Examples with UnmappedBasicAttributeCascadeDeleter com.blazebit.persistence.view.impl.update.flush.UnmappedBasicAttributeCascadeDeleter used on opensource projects

Example 1 with UnmappedBasicAttributeCascadeDeleter

use of com.blazebit.persistence.view.impl.update.flush.UnmappedBasicAttributeCascadeDeleter in project blaze-persistence by Blazebit.

the class EntityViewUpdaterImpl method createSingularAttributeFlusher.

private DirtyAttributeFlusher<?, ?, ?> createSingularAttributeFlusher(EntityViewManagerImpl evm, Map<Object, EntityViewUpdaterImpl> localCache, ManagedViewTypeImplementor<?> viewType, AbstractMethodAttribute<?, ?> attribute, EntityViewUpdaterImpl owner, String ownerMapping) {
    EntityMetamodel entityMetamodel = evm.getMetamodel().getEntityMetamodel();
    Class<?> entityClass = viewType.getEntityClass();
    String attributeName = attribute.getName();
    String attributeMapping = attribute.getMapping();
    AttributeAccessor entityAttributeAccessor = Accessors.forEntityMapping(evm, attribute);
    String attributeLocation = attribute.getLocation();
    boolean cascadePersist = attribute.isPersistCascaded();
    boolean cascadeUpdate = attribute.isUpdateCascaded();
    boolean cascadeDelete = attribute.isDeleteCascaded();
    boolean viewOnlyDeleteCascaded = cascadeDelete && !entityMetamodel.getManagedType(ExtendedManagedType.class, entityClass).getAttribute(attributeMapping).isDeleteCascaded();
    boolean optimisticLockProtected = attribute.isOptimisticLockProtected();
    Set<Type<?>> readOnlyAllowedSubtypes = attribute.getReadOnlyAllowedSubtypes();
    Set<Type<?>> persistAllowedSubtypes = attribute.getPersistCascadeAllowedSubtypes();
    Set<Type<?>> updateAllowedSubtypes = attribute.getUpdateCascadeAllowedSubtypes();
    JpaProvider jpaProvider = evm.getJpaProvider();
    if (attribute.isSubview()) {
        boolean shouldFlushUpdates = cascadeUpdate && !updateAllowedSubtypes.isEmpty();
        boolean shouldFlushPersists = cascadePersist && !persistAllowedSubtypes.isEmpty();
        ManagedViewTypeImplementor<?> subviewType = (ManagedViewTypeImplementor<?>) ((com.blazebit.persistence.view.metamodel.SingularAttribute<?, ?>) attribute).getType();
        boolean passThrough = false;
        if (attribute.isUpdatable() || shouldFlushUpdates || (passThrough = shouldPassThrough(evm, viewType, attribute))) {
            // TODO: shouldn't this be done for any flat view? or are updatable flat views for entity types disallowed?
            if (!(subviewType.getJpaManagedType() instanceof EntityType<?>)) {
                AttributeAccessor viewAttributeAccessor = Accessors.forViewAttribute(evm, attribute, true);
                // A singular attribute where the subview refers to an embeddable type
                EmbeddableUpdaterBasedViewToEntityMapper viewToEntityMapper = new EmbeddableUpdaterBasedViewToEntityMapper(attributeLocation, evm, subviewType.getJavaType(), readOnlyAllowedSubtypes, persistAllowedSubtypes, updateAllowedSubtypes, EntityLoaders.referenceLoaderForAttribute(evm, localCache, subviewType, attribute), shouldFlushPersists, null, owner == null ? this : owner, ownerMapping == null ? attributeMapping : ownerMapping + "." + attributeMapping, localCache);
                CompositeAttributeFlusher nestedFlusher = (CompositeAttributeFlusher) viewToEntityMapper.getFullGraphNode();
                boolean supportsQueryFlush = nestedFlusher.supportsQueryFlush() && jpaProvider.supportsUpdateSetEmbeddable();
                String parameterName;
                String updateFragment;
                if (supportsQueryFlush) {
                    parameterName = attributeName;
                    updateFragment = attributeMapping;
                } else {
                    parameterName = attributeName + "_";
                    updateFragment = attributeMapping + ".";
                }
                return new EmbeddableAttributeFlusher<>(attributeName, attributeMapping, updateFragment, parameterName, optimisticLockProtected, passThrough, supportsQueryFlush, entityAttributeAccessor, viewAttributeAccessor, viewToEntityMapper);
            } else {
                // Subview refers to entity type
                ViewTypeImplementor<?> attributeViewType = (ViewTypeImplementor<?>) subviewType;
                InitialValueAttributeAccessor viewAttributeAccessor = Accessors.forMutableViewAttribute(evm, attribute);
                AttributeAccessor subviewIdAccessor;
                InverseFlusher<Object> inverseFlusher = InverseFlusher.forAttribute(evm, localCache, viewType, attribute, TypeDescriptor.forType(evm, localCache, this, attribute, subviewType, owner, ownerMapping), owner, ownerMapping);
                InverseRemoveStrategy inverseRemoveStrategy = attribute.getInverseRemoveStrategy();
                ManagedType<?> ownerEntityType = owner == null ? viewType.getJpaManagedType() : owner.managedViewType.getJpaManagedType();
                ViewToEntityMapper viewToEntityMapper;
                boolean fetch = shouldFlushUpdates;
                String parameterName = null;
                String attributeElementIdMapping;
                if (ownerEntityType instanceof EntityType<?> && attribute.getMapping() != null) {
                    ExtendedManagedType<?> extendedManagedType = evm.getMetamodel().getEntityMetamodel().getManagedType(ExtendedManagedType.class, attributeViewType.getEntityClass());
                    attributeElementIdMapping = TypeDescriptor.getAttributeElementIdentifier(evm, (EntityType<?>) ownerEntityType, attribute.getName(), ownerMapping, attribute.getMapping(), extendedManagedType.getType());
                } else {
                    attributeElementIdMapping = ((MappingAttribute<?, ?>) attributeViewType.getIdAttribute()).getMapping();
                }
                subviewIdAccessor = Accessors.forSubviewAssociationId(evm, attributeViewType, attributeElementIdMapping, true);
                Attribute<?, ?> attributeIdAttribute = attributeViewType.getJpaManagedType().getAttribute(attributeElementIdMapping);
                javax.persistence.metamodel.Type<?> attributeIdAttributeType = entityMetamodel.type(JpaMetamodelUtils.resolveFieldClass(attributeViewType.getEntityClass(), attributeIdAttribute));
                List<String> idComponentMappings;
                boolean requiresComponentWiseSetInUpdate = true;
                if (requiresComponentWiseSetInUpdate && attributeIdAttributeType instanceof EmbeddableType<?>) {
                    // If the identifier used for the association is an embeddable, we must collect the individual attribute components since updates don't work on embeddables directly
                    Set<Attribute<?, ?>> idAttributeComponents = (Set<Attribute<?, ?>>) ((EmbeddableType<?>) attributeIdAttributeType).getAttributes();
                    idComponentMappings = new ArrayList<>(idAttributeComponents.size());
                    for (Attribute<?, ?> idAttributeComponent : idAttributeComponents) {
                        idComponentMappings.add(attributeMapping + "." + attributeElementIdMapping + "." + idAttributeComponent.getName());
                    }
                } else {
                    idComponentMappings = Collections.singletonList(attributeMapping + "." + attributeElementIdMapping);
                }
                String[] idAttributeMappings = idComponentMappings.toArray(new String[idComponentMappings.size()]);
                if (attribute.isUpdatable() && ownerEntityType instanceof EntityType<?>) {
                    viewToEntityMapper = createViewToEntityMapper(attributeLocation, evm, localCache, (EntityType<?>) ownerEntityType, attributeName, attributeMapping, attributeViewType, cascadePersist, cascadeUpdate, readOnlyAllowedSubtypes, persistAllowedSubtypes, updateAllowedSubtypes, EntityLoaders.referenceLoaderForAttribute(evm, localCache, attributeViewType, attribute.getViewTypes(), attributeElementIdMapping), owner, ownerMapping);
                    parameterName = attributeName;
                } else {
                    String elementIdentifier;
                    if (ownerEntityType instanceof EntityType<?>) {
                        elementIdentifier = TypeDescriptor.getAttributeElementIdentifier(evm, (EntityType<?>) ownerEntityType, attributeName, ownerMapping, attributeMapping, attributeViewType.getJpaManagedType());
                    } else {
                        elementIdentifier = null;
                    }
                    AttributeAccessor entityIdAccessor = Accessors.forEntityMapping(evm, attributeViewType.getEntityClass(), elementIdentifier);
                    if (shouldFlushUpdates) {
                        viewToEntityMapper = new UpdaterBasedViewToEntityMapper(attributeLocation, evm, subviewType.getJavaType(), readOnlyAllowedSubtypes, persistAllowedSubtypes, updateAllowedSubtypes, EntityLoaders.referenceLoaderForAttribute(evm, localCache, subviewType, attribute), subviewIdAccessor, entityIdAccessor, shouldFlushPersists, owner, ownerMapping, localCache);
                    } else if (!shouldFlushPersists && shouldPassThrough(evm, viewType, attribute)) {
                        viewToEntityMapper = new LoadOnlyViewToEntityMapper(EntityLoaders.referenceLoaderForAttribute(evm, localCache, subviewType, attribute), subviewIdAccessor, entityIdAccessor);
                    } else {
                        viewToEntityMapper = new LoadOrPersistViewToEntityMapper(attributeLocation, evm, subviewType.getJavaType(), readOnlyAllowedSubtypes, persistAllowedSubtypes, updateAllowedSubtypes, EntityLoaders.referenceLoaderForAttribute(evm, localCache, subviewType, attribute), subviewIdAccessor, entityIdAccessor, shouldFlushPersists, owner, ownerMapping, localCache);
                    }
                }
                return new SubviewAttributeFlusher<>(attributeName, attributeMapping, optimisticLockProtected, attribute.isUpdatable(), cascadeDelete, attribute.isOrphanRemoval(), viewOnlyDeleteCascaded, subviewType.getConverter(), fetch, idAttributeMappings, parameterName, passThrough, owner != null, entityAttributeAccessor, viewAttributeAccessor, subviewIdAccessor, viewToEntityMapper, inverseFlusher, inverseRemoveStrategy);
            }
        } else {
            return null;
        }
    } else {
        BasicTypeImpl<?> attributeType = (BasicTypeImpl<?>) ((com.blazebit.persistence.view.metamodel.SingularAttribute<?, ?>) attribute).getType();
        TypeDescriptor elementDescriptor = TypeDescriptor.forType(evm, localCache, this, attribute, attributeType, owner, ownerMapping);
        // Basic attributes like String, Integer but also JPA managed types
        boolean updatable = attribute.isUpdatable();
        if (updatable || elementDescriptor.shouldFlushMutations() || shouldPassThrough(evm, viewType, attribute)) {
            // Basic attributes can normally be updated by queries
            InverseFlusher<Object> inverseFlusher = InverseFlusher.forAttribute(evm, localCache, viewType, attribute, elementDescriptor, owner, ownerMapping);
            InverseRemoveStrategy inverseRemoveStrategy = attribute.getInverseRemoveStrategy();
            String parameterName = attributeName;
            String updateFragment = attributeMapping;
            ManagedType<?> ownerEntityType = owner == null ? viewType.getJpaManagedType() : owner.managedViewType.getJpaManagedType();
            UnmappedBasicAttributeCascadeDeleter deleter;
            if (elementDescriptor.isJpaEntity() && cascadeDelete && ownerEntityType instanceof EntityType<?>) {
                String elementIdAttributeName = TypeDescriptor.getAttributeElementIdentifier(evm, (EntityType<?>) ownerEntityType, attributeName, ownerMapping, attributeMapping, attributeType.getManagedType());
                deleter = new UnmappedBasicAttributeCascadeDeleter(evm, attributeName, entityMetamodel.getManagedType(ExtendedManagedType.class, entityClass).getAttribute(attributeMapping), attributeMapping + "." + elementIdAttributeName, false);
            } else {
                deleter = null;
            }
            // When wanting to read the actual value of non-updatable attributes or writing values to attributes we need the view attribute accessor
            // Whenever we merge or persist, we are going to need that
            AttributeAccessor viewAttributeAccessor;
            if (elementDescriptor.shouldFlushMutations()) {
                viewAttributeAccessor = Accessors.forMutableViewAttribute(evm, attribute);
            } else {
                viewAttributeAccessor = Accessors.forViewAttribute(evm, attribute, true);
            }
            Map.Entry<AttributeAccessor, BasicAttributeFlusher>[] componentFlusherEntries = null;
            if (elementDescriptor.isJpaEmbeddable()) {
                if (!jpaProvider.supportsUpdateSetEmbeddable()) {
                    Set<Attribute<?, ?>> attributes = (Set<Attribute<?, ?>>) attributeType.getManagedType().getAttributes();
                    Map<AttributeAccessor, BasicAttributeFlusher> componentFlushers = new HashMap<>(attributes.size());
                    buildComponentFlushers(evm, viewType.getEntityClass(), attributeType.getJavaType(), attributeName + "_", attributeMapping + ".", "", attributes, componentFlushers);
                    componentFlusherEntries = componentFlushers.entrySet().toArray(new Map.Entry[componentFlushers.size()]);
                }
            }
            return new BasicAttributeFlusher<>(attributeName, attributeMapping, true, optimisticLockProtected, updatable, cascadeDelete, attribute.isOrphanRemoval(), viewOnlyDeleteCascaded, componentFlusherEntries, elementDescriptor, updateFragment, parameterName, entityAttributeAccessor, viewAttributeAccessor, deleter, inverseFlusher, inverseRemoveStrategy);
        } else {
            return null;
        }
    }
}