LanguageCodeValidator class

LanguageCodeValidator extends TranslatedValidator to validate if a string is a valid language code.

This validator checks if the value matches the specified regex pattern that requires exactly 2 lowercase letters (ISO 639-1 standard).

Parameters:

regex The regular expression used to validate the language code format. Defaults to a regex that matches exactly 2 lowercase letters.
languageCodeWhitelist An optional list of allowed language codes.
languageCodeBlacklist An optional list of disallowed language codes.
errorText The error message returned if the validation fails.
checkNullOrEmpty Whether to check if the value is null or empty.

Inheritance

LanguageCodeValidator.new({RegExp? regex, List<String> languageCodeWhitelist = const <String>[], List<String> languageCodeBlacklist = const <String>[], String? errorText, bool checkNullOrEmpty = true}): Constructor for the language code validator.

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
languageCodeBlacklist → List<String>: An optional list of disallowed language codes.
final
languageCodeWhitelist → List<String>: An optional list of allowed language codes.
final
regex → RegExp: The regular expression used to validate the language code format.
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(String? 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(String? valueCandidate) → String?: Validates the value and checks if it is null or empty.
inherited
validateValue(String 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