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///
/// Copyright (c) 2016 Dropbox, Inc. All rights reserved.
///
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
///
/// Validator functions used by SDK to impose value constraints.
///
@interface DBStoneValidators <T> : NSObject
/// Validator for `NSString` objects. Enforces minimum length and/or maximum length and/or regex pattern.
+ (void (^_Nonnull)(NSString *))stringValidator:(nullable NSNumber *)minLength
maxLength:(nullable NSNumber *)maxLength
pattern:(nullable NSString *)pattern;
/// Validator for `NSNumber` objects. Enforces minimum value and/or maximum value.
+ (void (^_Nonnull)(NSNumber *))numericValidator:(nullable NSNumber *)minValue maxValue:(nullable NSNumber *)maxValue;
/// Validator for `NSArray` objects. Enforces minimum number of items and/or maximum minimum number of items. Method
/// requires a validator block that can validate each item in the array.
+ (void (^_Nonnull)(NSArray<T> *))arrayValidator:(nullable NSNumber *)minItems
maxItems:(nullable NSNumber *)maxItems
itemValidator:(void (^_Nullable)(T))itemValidator;
/// Validator for `NSDictionary` objects. Enforces minimum number of items and/or maximum minimum number of items.
/// Method
/// requires a validator block that can validate each item in the array.
+ (void (^_Nonnull)(NSDictionary<NSString *, T> *))mapValidator:(void (^_Nullable)(T))itemValidator;
/// Wrapper validator for nullable objects. Maintains a reference to the object's normal non-nullable validator.
+ (void (^_Nonnull)(T))nullableValidator:(void (^_Nonnull)(T))internalValidator;
+ (void (^_Nonnull)(id))nonnullValidator:(void (^_Nullable)(id))internalValidator;
+ (void)raiseIllegalStateErrorWithMessage:(NSString *)message;
@end
NS_ASSUME_NONNULL_END
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