gistfile1.txt

+ (void)initialize {
  if (self == [AppDataBase class]) {
    void (^dateAccessorFactory)(NSString*,NSString*) = ^(NSString *key, NSString *strKey) {
      void(^setterBlock)(id,NSDate*) = [^void(id self, NSDate *val) {
        [self willChangeValueForKey:key];
        [self setPrimitiveValue:val forKey:key];
        [self setPrimitiveValue:nil forKey:strKey];
        [self didChangeValueForKey:key];
      } copy];
      
      NSString*(^getterBlock)(id) = [^NSString*(id self) {
        NSString *strVal = [self primitiveValueForKey:strKey];
        if (strVal == nil) {
          strVal = [self stringByFormattingDate:[self valueForKey:key]];
          [self setPrimitiveValue:strVal forKey:strKey];
        }
        return strVal;
      } copy];
      
      NSString *setterName = [NSString stringWithFormat:@"set%@%@:", [[key substringToIndex:1] uppercaseString], [key substringFromIndex:1]];
      class_replaceMethod(self, NSSelectorFromString(setterName), pl_imp_implementationWithBlock(setterBlock), "v@:@");
      class_replaceMethod(self, NSSelectorFromString(strKey), pl_imp_implementationWithBlock(getterBlock), "@@:");
    };
    
    dateAccessorFactory(@"releaseDate", @"releaseDateString");
    dateAccessorFactory(@"createdDate", @"createdDateString");
    dateAccessorFactory(@"updatedDate", @"updatedDateString");
    dateAccessorFactory(@"changeDate", @"changeDateString");
    dateAccessorFactory(@"jsonCreatedDate", @"jsonCreatedString");
  }
}