Class ValidatorRuleBuilder<T>

Namespace

REslava.Result

Assembly

REslava.Result.dll

Fluent builder for creating validation rule sets for a specific entity type. Provides a fluent API for defining validation rules with method chaining.

public class ValidatorRuleBuilder<T>

Type Parameters

T

The type of entity to validate.

Inheritance

object

ValidatorRuleBuilder<T>

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Extension Methods

ValidationExtensions.EnsureNotNull<TCollection>(TCollection?, string, string?)

ValidatorRuleBuilderExtensions.Contains<T>(ValidatorRuleBuilder<T>, Expression<Func<T, string?>>, string, StringComparison, string?)

ValidatorRuleBuilderExtensions.EmailAddress<T>(ValidatorRuleBuilder<T>, Expression<Func<T, string?>>, string?)

ValidatorRuleBuilderExtensions.EndsWith<T>(ValidatorRuleBuilder<T>, Expression<Func<T, string?>>, string, StringComparison, string?)

ValidatorRuleBuilderExtensions.GreaterThan<T, TNum>(ValidatorRuleBuilder<T>, Expression<Func<T, TNum>>, TNum, string?)

ValidatorRuleBuilderExtensions.Length<T>(ValidatorRuleBuilder<T>, Expression<Func<T, string?>>, int, int, string?)

ValidatorRuleBuilderExtensions.LessThan<T, TNum>(ValidatorRuleBuilder<T>, Expression<Func<T, TNum>>, TNum, string?)

ValidatorRuleBuilderExtensions.Matches<T>(ValidatorRuleBuilder<T>, Expression<Func<T, string?>>, string, string?)

ValidatorRuleBuilderExtensions.MaxCount<T, TItem>(ValidatorRuleBuilder<T>, Expression<Func<T, IEnumerable<TItem>?>>, int, string?)

ValidatorRuleBuilderExtensions.MaxLength<T>(ValidatorRuleBuilder<T>, Expression<Func<T, string?>>, int, string?)

ValidatorRuleBuilderExtensions.MinCount<T, TItem>(ValidatorRuleBuilder<T>, Expression<Func<T, IEnumerable<TItem>?>>, int, string?)

ValidatorRuleBuilderExtensions.MinLength<T>(ValidatorRuleBuilder<T>, Expression<Func<T, string?>>, int, string?)

ValidatorRuleBuilderExtensions.NonNegative<T, TNum>(ValidatorRuleBuilder<T>, Expression<Func<T, TNum>>, string?)

ValidatorRuleBuilderExtensions.NotEmpty<T>(ValidatorRuleBuilder<T>, Expression<Func<T, string?>>, string?)

ValidatorRuleBuilderExtensions.NotEmpty<T, TItem>(ValidatorRuleBuilder<T>, Expression<Func<T, IEnumerable<TItem>?>>, string?)

ValidatorRuleBuilderExtensions.NotNull<T, TProp>(ValidatorRuleBuilder<T>, Expression<Func<T, TProp?>>, string?)

ValidatorRuleBuilderExtensions.NotWhiteSpace<T>(ValidatorRuleBuilder<T>, Expression<Func<T, string?>>, string?)

ValidatorRuleBuilderExtensions.Positive<T, TNum>(ValidatorRuleBuilder<T>, Expression<Func<T, TNum>>, string?)

ValidatorRuleBuilderExtensions.Range<T, TNum>(ValidatorRuleBuilder<T>, Expression<Func<T, TNum>>, TNum, TNum, string?)

ValidatorRuleBuilderExtensions.StartsWith<T>(ValidatorRuleBuilder<T>, Expression<Func<T, string?>>, string, StringComparison, string?)

Examples

var rules = new ValidatorRuleBuilder<User>()
    .Rule(u => u.Email, "Required", email => !string.IsNullOrEmpty(email))
    .Rule(u => u.Email, "Format", email => email.Contains("@"))
    .Rule(u => u.Age, "MinAge", age => age >= 18)
    .Build();

var result = rules.Validate(user);

Methods

AddRule(IValidatorRule<T>)

Adds a validation rule to the builder.

public ValidatorRuleBuilder<T> AddRule(IValidatorRule<T> rule)

Parameters

rule IValidatorRule<T>

The validation rule to add.

Returns

ValidatorRuleBuilder<T>

The builder instance for method chaining.

Examples

var builder = new ValidatorRuleBuilder<User>();
var rule = new EmailValidatorRule();
builder.AddRule(rule);

Build()

Builds an immutable validation rule set from the added rules.

public ValidatorRuleSet<T> Build()

Returns

ValidatorRuleSet<T>

An immutable ValidatorRuleSet containing all added rules.

Examples

var builder = new ValidatorRuleBuilder<User>()
    .Rule(u => u.Email, "Required", "Email required", email => !string.IsNullOrEmpty(email));

var ruleSet = builder.Build();  // Returns ValidatorRuleSet<User>

RuleAsync<TProperty>(Func<T, TProperty>, string, string, Func<TProperty, Task<bool>>)

Adds a custom async validation rule defined by an async predicate function.

public ValidatorRuleBuilder<T> RuleAsync<TProperty>(Func<T, TProperty> propertySelector, string ruleName, string errorMessage, Func<TProperty, Task<bool>> validator)

Parameters

propertySelector Func<T, TProperty>

Function to select the property to validate.

ruleName string

The name of the validation rule.

errorMessage string

The error message if validation fails.

validator Func<TProperty, Task<bool>>

The async validation predicate function.

Returns

ValidatorRuleBuilder<T>

The builder instance for method chaining.

Type Parameters

TProperty

The type of the property being validated.

Examples

var builder = new ValidatorRuleBuilder<User>()
    .RuleAsync(u => u.Email, "UniqueEmail", "Email already exists", async email => await EmailService.IsUniqueAsync(email))
    .Rule(u => u.Age, "MinAge", "Must be 18+", age => age >= 18);

Rule<TProperty>(Func<T, TProperty>, string, string, Func<TProperty, bool>)

Adds a custom validation rule defined by a predicate function.

public ValidatorRuleBuilder<T> Rule<TProperty>(Func<T, TProperty> propertySelector, string ruleName, string errorMessage, Func<TProperty, bool> validator)

Parameters

propertySelector Func<T, TProperty>

Function to select the property to validate.

ruleName string

The name of the validation rule.

errorMessage string

The error message if validation fails.

validator Func<TProperty, bool>

The validation predicate function.

Returns

ValidatorRuleBuilder<T>

The builder instance for method chaining.

Type Parameters

TProperty

The type of the property being validated.

Examples

var builder = new ValidatorRuleBuilder<User>()
    .Rule(u => u.Email, "Required", "Email is required", email => !string.IsNullOrEmpty(email))
    .Rule(u => u.Age, "MinAge", "Must be 18+", age => age >= 18);