Examples with ViewToEntityMapper com.blazebit.persistence.view.impl.entity.ViewToEntityMapper used on opensource projects

Example 6 with ViewToEntityMapper

use of com.blazebit.persistence.view.impl.entity.ViewToEntityMapper in project blaze-persistence by Blazebit.

the class MapAttributeFlusher method mergeCollectionElements.

@Override
protected boolean mergeCollectionElements(UpdateContext context, Object ownerView, Object view, E entity, V value) {
    if (elementFlushers != null) {
        if (flushStrategy == FlushStrategy.ENTITY || context.isForceEntity()) {
            for (CollectionElementAttributeFlusher<E, V> elementFlusher : elementFlushers) {
                elementFlusher.flushEntity(context, entity, ownerView, view, value, null);
            }
        } else {
            for (CollectionElementAttributeFlusher<E, V> elementFlusher : elementFlushers) {
                elementFlusher.flushQuery(context, null, null, null, ownerView, view, value, null, null);
            }
        }
        return !elementFlushers.isEmpty();
    } else {
        // Invocations of JPA merge can change the identity that leads to requeuing into the collection being required
        final boolean needsRequeuing = keyDescriptor.shouldJpaMerge() || value instanceof RecordingMap<?, ?, ?> && elementDescriptor.shouldJpaMerge();
        if (needsRequeuing) {
            if (value instanceof RecordingMap<?, ?, ?>) {
                return mergeAndRequeue(context, (RecordingMap) value, ((RecordingMap) value).getDelegate());
            } else {
                return mergeAndRequeue(context, null, (Map<Object, Object>) (Map<?, ?>) value);
            }
        } else {
            @SuppressWarnings("unchecked") final EntityManager em = context.getEntityManager();
            final ViewToEntityMapper keyMapper = mapper.getKeyMapper();
            final ViewToEntityMapper valueMapper = mapper.getValueMapper();
            final boolean flushKey = keyDescriptor.shouldJpaPersistOrMerge();
            final boolean flushValue = elementDescriptor.shouldJpaPersistOrMerge();
            final Iterator<Map.Entry<Object, Object>> iter = getRecordingIterator(value);
            try {
                while (iter.hasNext()) {
                    Map.Entry<Object, Object> entry = iter.next();
                    Object k = entry.getKey();
                    Object v = entry.getValue();
                    if (flushKey) {
                        persistOrMergeKey(context, em, k);
                    } else if (keyMapper != null) {
                        keyMapper.applyToEntity(context, null, k);
                    }
                    if (v != null) {
                        if (flushValue) {
                            v = persistOrMerge(em, v);
                        } else if (valueMapper != null) {
                            valueMapper.applyToEntity(context, null, v);
                        }
                    }
                    if (v != entry.getValue()) {
                        entry.setValue(v);
                    }
                }
            } finally {
                resetRecordingIterator(value);
            }
            return true;
        }
    }
}

Example 7 with ViewToEntityMapper

use of com.blazebit.persistence.view.impl.entity.ViewToEntityMapper in project blaze-persistence by Blazebit.

the class MapAttributeFlusher method replaceCollection.

@Override
protected void replaceCollection(UpdateContext context, Object ownerView, Object view, E entity, V value, FlushStrategy flushStrategy) {
    if (flushStrategy == FlushStrategy.QUERY) {
        Map<Object, Object> removedAllObjects;
        if (deleteElements(context, ownerView, view, value, false, null, true)) {
            // TODO: We should load the initial value
            removedAllObjects = Collections.emptyMap();
        } else {
            removedAllObjects = Collections.emptyMap();
        }
        addElements(context, ownerView, view, removedAllObjects, true, value, null, null, true);
        processRemovedObjects(context, removedAllObjects);
    } else {
        if (entityAttributeAccessor != null) {
            if (keyDescriptor.isSubview() || elementDescriptor.isSubview()) {
                Map<Object, Object> newMap;
                if (value == null) {
                    newMap = (Map<Object, Object>) createJpaMap(0);
                } else {
                    newMap = (Map<Object, Object>) createJpaMap(value.size());
                    ViewToEntityMapper keyMapper = mapper.getKeyMapper();
                    ViewToEntityMapper valueMapper = mapper.getValueMapper();
                    final Iterator<Map.Entry<Object, Object>> iter = getRecordingIterator(value);
                    try {
                        while (iter.hasNext()) {
                            Map.Entry<Object, Object> entry = iter.next();
                            Object k = entry.getKey();
                            Object v = entry.getValue();
                            if (keyMapper != null) {
                                k = keyMapper.applyToEntity(context, null, k);
                            }
                            if (valueMapper != null) {
                                v = valueMapper.applyToEntity(context, null, v);
                            }
                            newMap.put(k, v);
                        }
                    } finally {
                        resetRecordingIterator(value);
                    }
                }
                entityAttributeAccessor.setValue(entity, newMap);
            } else {
                entityAttributeAccessor.setValue(entity, value);
            }
        }
    }
}

Example 8 with ViewToEntityMapper

use of com.blazebit.persistence.view.impl.entity.ViewToEntityMapper in project blaze-persistence by Blazebit.

the class MapAttributeFlusher method addFlatViewElementFlushActions.

@Override
protected void addFlatViewElementFlushActions(UpdateContext context, TypeDescriptor typeDescriptor, List<MapAction<?>> actions, V current) {
    final ViewToEntityMapper mapper = typeDescriptor.getViewToEntityMapper();
    for (Map.Entry<?, ?> entry : current.entrySet()) {
        Object o = entry.getValue();
        if (o instanceof MutableStateTrackable) {
            MutableStateTrackable element = (MutableStateTrackable) o;
            @SuppressWarnings("unchecked") DirtyAttributeFlusher<?, E, V> flusher = (DirtyAttributeFlusher<?, E, V>) (DirtyAttributeFlusher) mapper.getNestedDirtyFlusher(context, element, (DirtyAttributeFlusher) null);
            if (flusher != null) {
                // At this point, we have to check the collection actions to determine if the element was added through actions somehow
                // We will register a special MapPutAction if the element was not added through actions to issue an UPDATE statement
                // By default, since the element is dirty, we start with the state UPDATED and go through state transitions
                // based on the containment of the element in the added/removed objects collections of the actions
                EntryState state = EntryState.UPDATED;
                Object replacedObject = element;
                for (MapAction<?> action : actions) {
                    Collection<Object> removedElements = action.getRemovedElements();
                    Collection<Object> addedElements = action.getAddedElements();
                    if (removedElements.isEmpty()) {
                        if (identityContains(addedElements, element)) {
                            state = state.onAdd();
                        }
                    } else if (addedElements.isEmpty()) {
                        if (identityContains(removedElements, element)) {
                            state = state.onRemove();
                        }
                    } else {
                        // Here we have a MapPutAction or MapPutAllAction where added/removed have the same cardinality
                        Iterator<Object> addedIter = addedElements.iterator();
                        Iterator<Object> removedIter = removedElements.iterator();
                        while (addedIter.hasNext()) {
                            Object added = addedIter.next();
                            Object removed = removedIter.next();
                            if (removed == element) {
                                if (added == element) {
                                    // This is a MapPutAction or MapPutAllAction where the old and new object are the same instances
                                    replacedObject = element;
                                    state = EntryState.UPDATED;
                                } else {
                                    state = state.onRemove();
                                }
                                break;
                            } else if (added == element) {
                                replacedObject = removed;
                                state = EntryState.UPDATED;
                                break;
                            }
                        }
                    }
                }
                // and there is no action that would flush the object changes already
                if (state == EntryState.UPDATED && replacedObject == element) {
                    actions.add(new MapPutAction<>(entry.getKey(), element, element));
                }
            }
        }
    }
}

Example 9 with ViewToEntityMapper

use of com.blazebit.persistence.view.impl.entity.ViewToEntityMapper in project blaze-persistence by Blazebit.

the class MapAttributeFlusher method flushCollectionViewElements.

private Map<Object, Object> flushCollectionViewElements(UpdateContext context, V value) {
    ViewToEntityMapper keyMapper = mapper.getKeyMapper();
    ViewToEntityMapper valueMapper = mapper.getValueMapper();
    final Iterator<Map.Entry<Object, Object>> iter = getRecordingIterator(value);
    Map<Object, Object> embeddables = null;
    if ((!keyDescriptor.isIdentifiable() || !elementDescriptor.isIdentifiable()) && mapping != null) {
        embeddables = new LinkedHashMap<>();
    }
    try {
        while (iter.hasNext()) {
            Map.Entry<Object, Object> entry = iter.next();
            Object k = entry.getKey();
            Object v = entry.getValue();
            Object newKey = k;
            if (keyMapper != null) {
                newKey = keyMapper.applyToEntity(context, null, k);
            }
            Object newValue = v;
            if (valueMapper != null) {
                newValue = valueMapper.applyToEntity(context, null, v);
            }
            if (embeddables != null) {
                // Only query flushing of an element collection can bring us here
                embeddables.put(newKey, newValue);
            }
        }
    } finally {
        resetRecordingIterator(value);
    }
    return embeddables;
}

Example 10 with ViewToEntityMapper

use of com.blazebit.persistence.view.impl.entity.ViewToEntityMapper in project blaze-persistence by Blazebit.

the class TypeDescriptor method forType.

public static TypeDescriptor forType(EntityViewManagerImpl evm, Map<Object, EntityViewUpdaterImpl> localCache, EntityViewUpdaterImpl updater, AbstractMethodAttribute<?, ?> attribute, Type<?> type, EntityViewUpdaterImpl owner, String ownerMapping) {
    EntityMetamodel entityMetamodel = evm.getMetamodel().getEntityMetamodel();
    String attributeLocation = attribute.getLocation();
    boolean cascadePersist = attribute.isPersistCascaded();
    boolean cascadeUpdate = attribute.isUpdateCascaded();
    Set<Type<?>> readOnlyAllowedSubtypes = attribute.getReadOnlyAllowedSubtypes();
    Set<Type<?>> persistAllowedSubtypes = attribute.getPersistCascadeAllowedSubtypes();
    Set<Type<?>> updateAllowedSubtypes = attribute.getUpdateCascadeAllowedSubtypes();
    EntityToEntityMapper entityToEntityMapper = null;
    ViewToEntityMapper viewToEntityMapper = null;
    ViewToEntityMapper loadOnlyViewToEntityMapper = null;
    final ManagedType<?> managedType = entityMetamodel.getManagedType(type.getJavaType());
    final boolean jpaEntity = managedType instanceof EntityType<?>;
    final boolean jpaManaged = managedType != null;
    final boolean mutable;
    final boolean identifiable;
    TypeConverter<Object, Object> converter = (TypeConverter<Object, Object>) type.getConverter();
    BasicUserType<Object> basicUserType;
    ManagedType<?> ownerEntityType = owner == null ? attribute.getDeclaringType().getJpaManagedType() : owner.getManagedViewType().getJpaManagedType();
    String attributeIdAttributeName = null;
    String entityIdAttributeName = null;
    Class<?> jpaType;
    // TODO: currently we only check if the declared type is mutable, but we have to let the collection flusher which types are considered updatable/creatable
    if (type instanceof BasicType<?>) {
        jpaType = type.getJavaType();
        basicUserType = (BasicUserType<Object>) ((BasicType<?>) type).getUserType();
        mutable = basicUserType.isMutable();
        identifiable = jpaEntity || !jpaManaged;
        if (jpaEntity) {
            Map<String, Map<?, ?>> fetchGraph = null;
            UnmappedAttributeCascadeDeleter deleter = null;
            // We only need to know the fetch graph when we actually do updates
            if (cascadeUpdate) {
                fetchGraph = getFetchGraph(attribute.getFetches(), attribute.getMapping(), managedType);
            }
            if (ownerEntityType instanceof EntityType<?>) {
                ExtendedManagedType<?> extendedManagedType = evm.getMetamodel().getEntityMetamodel().getManagedType(ExtendedManagedType.class, type.getJavaType());
                entityIdAttributeName = extendedManagedType.getIdAttribute().getName();
                attributeIdAttributeName = getAttributeElementIdentifier(evm, (EntityType<?>) ownerEntityType, attribute.getName(), ownerMapping, attribute.getMapping(), extendedManagedType.getType());
                // Only construct when orphanRemoval or delete cascading is enabled, orphanRemoval implies delete cascading
                if (attribute.isDeleteCascaded()) {
                    String mapping = attribute.getMapping();
                    ExtendedManagedType elementManagedType = entityMetamodel.getManagedType(ExtendedManagedType.class, attribute.getDeclaringType().getJpaManagedType());
                    deleter = new UnmappedBasicAttributeCascadeDeleter(evm, mapping, elementManagedType.getAttribute(mapping), mapping + "." + attributeIdAttributeName, false);
                }
            }
            // TODO: EntityToEntityMapper should also use the attributeIdAttributeName
            entityToEntityMapper = new DefaultEntityToEntityMapper(cascadePersist, cascadeUpdate, jpaType, basicUserType, new DefaultEntityLoaderFetchGraphNode(evm, attribute.getName(), (EntityType<?>) managedType, fetchGraph), deleter);
        }
    } else {
        ManagedViewTypeImplementor<?> elementType = (ManagedViewTypeImplementor<?>) type;
        jpaType = elementType.getEntityClass();
        basicUserType = null;
        mutable = elementType.isUpdatable() || elementType.isCreatable() || !persistAllowedSubtypes.isEmpty() || !updateAllowedSubtypes.isEmpty();
        Set<ManagedViewType<?>> viewTypes = attribute.getViewTypes();
        if (elementType.getJpaManagedType() instanceof EntityType<?> && ownerEntityType instanceof EntityType<?>) {
            ExtendedManagedType<?> extendedManagedType = evm.getMetamodel().getEntityMetamodel().getManagedType(ExtendedManagedType.class, elementType.getEntityClass());
            entityIdAttributeName = extendedManagedType.getIdAttribute().getName();
            attributeIdAttributeName = getAttributeElementIdentifier(evm, (EntityType<?>) ownerEntityType, attribute.getName(), ownerMapping, attribute.getMapping(), extendedManagedType.getType());
        }
        viewToEntityMapper = createViewToEntityMapper(evm, localCache, updater, attributeIdAttributeName, attribute.getMapping(), attributeLocation, elementType, cascadePersist, cascadeUpdate, readOnlyAllowedSubtypes, persistAllowedSubtypes, updateAllowedSubtypes, EntityLoaders.referenceLoaderForAttribute(evm, localCache, elementType, viewTypes, attributeIdAttributeName), owner, ownerMapping);
        loadOnlyViewToEntityMapper = createLoadOnlyViewToEntityMapper(attributeLocation, evm, localCache, attributeIdAttributeName, attribute.getMapping(), elementType, cascadePersist, cascadeUpdate, readOnlyAllowedSubtypes, persistAllowedSubtypes, updateAllowedSubtypes, EntityLoaders.referenceLoaderForAttribute(evm, localCache, elementType, viewTypes, attributeIdAttributeName), owner, ownerMapping);
        identifiable = viewToEntityMapper.getViewIdAccessor() != null;
    }
    final boolean shouldJpaMerge = jpaEntity && mutable && cascadeUpdate;
    final boolean shouldJpaPersist = jpaEntity && mutable && cascadePersist;
    final boolean shouldFlushUpdates = cascadeUpdate && !updateAllowedSubtypes.isEmpty();
    final boolean shouldFlushPersists = cascadePersist && !persistAllowedSubtypes.isEmpty();
    return new TypeDescriptor(mutable, identifiable, jpaManaged, jpaEntity, shouldJpaMerge, shouldJpaPersist, shouldFlushPersists, shouldFlushUpdates, entityIdAttributeName, attributeIdAttributeName, jpaType, converter, basicUserType, entityToEntityMapper, viewToEntityMapper, loadOnlyViewToEntityMapper);
}