EqualLengthValidator<T> class

EqualLengthValidator extends TranslatedValidator to validate if a value has a specified length.

This validator works with various types, including String, Iterable, and Map.

Parameters:

Inheritance

EqualLengthValidator(int length, {bool allowEmpty = false, String? errorText, bool checkNullOrEmpty = true}): Constructor for the equal length validator.
const

allowEmpty → bool: Whether to allow empty values.
final
checkNullOrEmpty → bool: Whether to check if the value is null or empty.
finalinherited
errorText → String: The error message returned if the value is invalid.
no setterinherited
hashCode → int: The hash code for this object.
no setterinherited
length → int: The exact length the value should have.
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
translatedErrorText → String: The translated error message returned if the value is invalid.
no setteroverride

isNullOrEmpty(T? valueCandidate) → bool: Checks if the value is null or empty. Returns true if the value is null or empty, otherwise false. The value is considered empty if it is a String, Iterable, or Map and it is empty or contains only whitespace characters. If the value is not a String, Iterable, or Map, it is considered empty if it is null.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toString() → String: A string representation of this object.
inherited
validate(T? valueCandidate) → String?: Validates the value and checks if it is null or empty.
inherited
validateValue(T valueCandidate) → String?: Validates the value. Returns null if the value is valid, otherwise an error message. Call validate() instead of this method when using the validator.
override