# UriValidator class abstract interface

An abstract validator for URI/URL validation.

This provides a contract for validating URIs and returning appropriate error messages when validation fails. Implement this to create custom URI validation logic.

Example Usage:

    class HttpUriValidator implements UriValidator {
      @override
      bool isValid(Uri uri) => uri.scheme == 'http' || uri.scheme == 'https';

      @override
      String get errorMessage => 'Must be a valid HTTP/HTTPS URL';
    }

    void main() {
      final validator = HttpUriValidator();
      final uri = Uri.parse('https://example.com');

      if (!validator.isValid(uri)) {
        print(validator.errorMessage);
      }
    }

## Properties

errorMessage → String
  Gets the error message to display when validation fails.
  no setter
hashCode → int
  The hash code for this object.
  no setter inherited
runtimeType → Type
  A representation of the runtime type of the object.
  no setter inherited

## Methods

isValid(Uri uri) → bool
  Validates whether the given URI meets specific criteria.
noSuchMethod(Invocation invocation) → dynamic
  Invoked when a nonexistent method or property is accessed.
  inherited
toString() → String
  A string representation of this object.
  inherited

## Operators

operator ==(Object other) → bool
  The equality operator.
  inherited