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* first iteration on JSONModel -> NSManagedObject
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| // | ||
| // JSONModel+CoreData.h | ||
| // JSONModelDemo_iOS | ||
| // | ||
| // Created by Marin Todorov on 22/1/14. | ||
| // Copyright (c) 2014 Underplot ltd. All rights reserved. | ||
| // | ||
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| #import <Foundation/Foundation.h> | ||
| #import "JSONModel.h" | ||
| #import <CoreData/CoreData.h> | ||
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| @interface JSONModel(CoreData) | ||
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| @end | ||
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| @interface NSManagedObject(JSONModel) | ||
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| +(instancetype)entityWithModel:(id<AbstractJSONModelProtocol>)model inContext:(NSManagedObjectContext*)context error:(NSError**)error; | ||
| +(instancetype)entityWithDictionary:(NSDictionary*)dictionary inContext:(NSManagedObjectContext*)context error:(NSError**)error; | ||
| -(BOOL)updateWithDictionary:(NSDictionary*)dictionary error:(NSError**)error; | ||
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| @end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| // | ||
| // JSONModel+CoreData.m | ||
| // JSONModelDemo_iOS | ||
| // | ||
| // Created by Marin Todorov on 22/1/14. | ||
| // Copyright (c) 2014 Underplot ltd. All rights reserved. | ||
| // | ||
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| #import "JSONModel+CoreData.h" | ||
| #import <objc/runtime.h> | ||
| #import <objc/message.h> | ||
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| @implementation JSONModel(CoreData) | ||
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| @end | ||
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| @implementation NSManagedObject(JSONModel) | ||
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| +(NSString*)entityName | ||
| { | ||
| return nil; | ||
| } | ||
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| +(instancetype)entityWithModel:(id<AbstractJSONModelProtocol>)model inContext:(NSManagedObjectContext*)context error:(NSError**)error | ||
| { | ||
| return [self entityWithDictionary: [model toDictionary] | ||
| inContext: context | ||
| error:error]; | ||
| } | ||
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| +(instancetype)entityWithDictionary:(NSDictionary*)dictionary inContext:(NSManagedObjectContext*)context error:(NSError**)error | ||
| { | ||
| NSManagedObject* entity = [NSEntityDescription | ||
| insertNewObjectForEntityForName: self.entityName?self.entityName:NSStringFromClass([self class]) | ||
| inManagedObjectContext:context]; | ||
| if (entity) { | ||
| if (![entity updateWithDictionary: dictionary error: error]) { | ||
| return nil; | ||
| } | ||
| } | ||
| return entity; | ||
| } | ||
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| -(BOOL)updateWithDictionary:(NSDictionary*)dictionary error:(NSError**)error | ||
| { | ||
| //introspect managed object | ||
| Class class = [self class]; | ||
| NSMutableDictionary* moProperties = [@{} mutableCopy]; | ||
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| while (class != [NSManagedObject class]) { | ||
| unsigned int propertyCount; | ||
| objc_property_t *properties = class_copyPropertyList(class, &propertyCount); | ||
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| //loop over the class properties | ||
| for (unsigned int i = 0; i < propertyCount; i++) { | ||
| objc_property_t property = properties[i]; | ||
| const char *propertyName = property_getName(property); | ||
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| const char *attrs = property_getAttributes(property); | ||
| NSString* propertyAttributes = [NSString stringWithUTF8String:attrs]; | ||
| NSScanner* scanner = [NSScanner scannerWithString: propertyAttributes]; | ||
| NSString* propertyType = nil; | ||
| [scanner scanUpToString:@"T" intoString: nil]; | ||
| [scanner scanString:@"T" intoString:nil]; | ||
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| //check if the property is an instance of a class | ||
| if ([scanner scanString:@"@\"" intoString: &propertyType]) { | ||
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| [scanner scanUpToCharactersFromSet:[NSCharacterSet characterSetWithCharactersInString:@"\"<"] | ||
| intoString:&propertyType]; | ||
| } | ||
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| moProperties[[NSString stringWithUTF8String:propertyName]] = NSClassFromString(propertyType); | ||
| } | ||
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| free(properties); | ||
| class = [class superclass]; | ||
| } | ||
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| //validate dictionary keys | ||
| NSArray* dictionaryKeys = [dictionary allKeys]; | ||
| for (NSString* key in [moProperties allKeys]) { | ||
| if (![dictionaryKeys containsObject:key]) { | ||
| //unmatched key | ||
| if (error) { | ||
| *error = [JSONModelError errorInvalidDataWithTypeMismatch:[NSString stringWithFormat: @"Key \"%@\" not found in manged object's property list", key]]; | ||
| } | ||
| return NO; | ||
| } | ||
| } | ||
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| //copy values over | ||
| for (NSString* key in [moProperties allKeys]) { | ||
| id value = dictionary[key]; | ||
| NSLog(@"class: %@", moProperties[key]); | ||
| //exception classes - for core data should be NSDate by default | ||
| if ([[moProperties[key]class] isEqual:[NSDate class]]) { | ||
| if ([self respondsToSelector:@selector(NSDateFromNSString:)]) { | ||
| #pragma clang diagnostic push | ||
| #pragma clang diagnostic ignored "-Warc-performSelector-leaks" | ||
| //transform the value | ||
| value = [self performSelector:@selector(NSDateFromNSString:) withObject:dictionary[key]]; | ||
| #pragma clang diagnostic pop | ||
| } else { | ||
| value = [self __NSDateFromNSString: dictionary[key]]; | ||
| } | ||
| } | ||
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| //copy the value to the managed object | ||
| [self setValue:value forKey:key]; | ||
| } | ||
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| return YES; | ||
| } | ||
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| #pragma mark - string <-> date | ||
| -(NSDate*)__NSDateFromNSString:(NSString*)string | ||
| { | ||
| NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; | ||
| string = [string stringByReplacingOccurrencesOfString:@":" withString:@""]; // this is such an ugly code, is this the only way? | ||
| [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HHmmssZZZZ"]; | ||
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| return [dateFormatter dateFromString: string]; | ||
| } | ||
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| @end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| // | ||
| // CoreDataViewController.h | ||
| // JSONModelDemo_iOS | ||
| // | ||
| // Created by Marin Todorov on 22/1/14. | ||
| // Copyright (c) 2014 Underplot ltd. All rights reserved. | ||
| // | ||
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| #import <UIKit/UIKit.h> | ||
| #import <CoreData/CoreData.h> | ||
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| @interface CoreDataViewController : UIViewController | ||
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| @end |
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