/*

 File: AtomicStoreCacheNodeSubclass.m

 Abstract: Custom cache nodes used by AtomicStoreSubclass.

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#import <CoreData/NSAtomicStore.h>

#import <CoreData/NSAtomicStoreCacheNode.h>

#import "AtomicStoreCacheNodeSubclass.h"

@implementation AtomicStoreCacheNodeSubclass

- (id)initWithObjectID:(NSManagedObjectID *)moid {

    if (nil != (self = [super initWithObjectID:moid])) {

        entityDescription = [[self objectID] entity]; // Don't retain, PSC owns it

    }

    return self;

}

- (NSEntityDescription *)entity {

    return entityDescription;

}

// Check to see if we've unpacked our underlying representation; if not, do

// it now

- (id)valueForKey:(NSString *)key {

    if (nil != propertyDataCache) {

        [self resolvePropertyValues: nil];

    }

    return [super valueForKey:key];

}

- (NSString *)description {

    if (nil != propertyDataCache) {

        return [propertyDataCache description];

    }

    return [[self propertyCache] description];

}

- (void)setPropertyCacheData:(NSDictionary *)dictionary {

    if (propertyDataCache != dictionary) {

        [dictionary retain];

        [propertyDataCache release];

        propertyDataCache = dictionary;

    }

}

// Unpack the propertyDataCache and set the propertyCache

- (void)resolvePropertyValues:(NSError **)error {

    NSMutableDictionary *newPropertyCache = [NSMutableDictionary dictionary];

    NSAtomicStore *store = (NSAtomicStore *)[[self objectID] persistentStore];

    NSDictionary *storeEntities = [[[store persistentStoreCoordinator] managedObjectModel] entitiesByName];

    NSDictionary *attributeDescriptions = [entityDescription attributesByName];

    for (NSString *attributeName in attributeDescriptions) {

        id attributeValue = [propertyDataCache valueForKey:attributeName];

        if (nil != attributeValue) {

            NSAttributeDescription *attributeDescription = [attributeDescriptions valueForKey:attributeName];

            if (NSTransformableAttributeType == [attributeDescription attributeType]) {

                NSString *transformerName = [attributeDescription valueTransformerName];

                attributeValue = (nil == transformerName) ? [[NSValueTransformer valueTransformerForName: NSKeyedUnarchiveFromDataTransformerName] transformedValue: attributeValue] : [[NSValueTransformer valueTransformerForName: transformerName] reverseTransformedValue: attributeValue];

            }

            [newPropertyCache setValue: attributeValue forKey:attributeName];

        }

    }

    NSDictionary *relationshipDescriptions = [entityDescription relationshipsByName];

    for (NSString *relationshipName in relationshipDescriptions) {

        NSArray *rawDestinations = [propertyDataCache valueForKey:relationshipName];

        NSMutableArray *destinationNodes = [NSMutableArray array];

        for (NSArray *tuple in rawDestinations) {

            if (0 == [tuple count]) {

                NSLog(@"Bad happened.");

            }

            NSString *destinationEntityName = [tuple objectAtIndex: 0];

            id refdata = [tuple objectAtIndex: 1];

            NSManagedObjectID *oid = [store objectIDForEntity:[storeEntities valueForKey: destinationEntityName] referenceObject:refdata];

            NSAtomicStoreCacheNode *destinationNode = [store cacheNodeForObjectID: oid];

            if (nil == destinationNode) {

                NSLog(@"Referential integrity error. Can't find node for ID: %@", oid);

                if (nil != error) {

                    *error = [NSError errorWithDomain:@"MyAtomicStoreNodes" code:41 userInfo:[NSDictionary dictionaryWithObject:oid forKey:@"badID"]];

                }

                return;

            }

            [destinationNodes addObject: destinationNode];

        }

        if (![[relationshipDescriptions valueForKey: relationshipName] isToMany]) {

            if (0 < [destinationNodes count]) {

                [newPropertyCache setValue: [destinationNodes objectAtIndex:0] forKey:relationshipName];

            }

        } else {

            [newPropertyCache setValue: destinationNodes forKey:relationshipName];

        }

    }

    [self setPropertyCache:newPropertyCache];

    [self setPropertyCacheData:nil];

}

@end