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RuleBuilder.cs
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RuleBuilder.cs
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#region License
// Copyright (c) .NET Foundation and contributors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// The latest version of this file can be found at https://github.com/FluentValidation/FluentValidation
#endregion
namespace FluentValidation.Internal {
using System;
using System.Collections.Generic;
using Validators;
/// <summary>
/// Builds a validation rule and constructs a validator.
/// </summary>
/// <typeparam name="T">Type of object being validated</typeparam>
/// <typeparam name="TProperty">Type of property being validated</typeparam>
internal class RuleBuilder<T, TProperty> : IRuleBuilderOptions<T, TProperty>, IRuleBuilderInitial<T, TProperty>, IRuleBuilderInitialCollection<T,TProperty>, IRuleBuilderOptionsConditions<T, TProperty>, IRuleBuilderInternal<T,TProperty> {
/// <summary>
/// The rule being created by this RuleBuilder.
/// </summary>
public IValidationRuleInternal<T, TProperty> Rule { get; }
IValidationRule<T, TProperty> IRuleBuilderInternal<T,TProperty>.Rule => Rule;
/// <summary>
/// Parent validator
/// </summary>
public AbstractValidator<T> ParentValidator { get; }
/// <summary>
/// Creates a new instance of the <see cref="RuleBuilder{T,TProperty}">RuleBuilder</see> class.
/// </summary>
public RuleBuilder(IValidationRuleInternal<T, TProperty> rule, AbstractValidator<T> parent) {
Rule = rule;
ParentValidator = parent;
}
public IRuleBuilderOptions<T, TProperty> SetValidator(IPropertyValidator<T, TProperty> validator) {
if (validator == null) throw new ArgumentNullException(nameof(validator));
Rule.AddValidator(validator);
return this;
}
public IRuleBuilderOptions<T, TProperty> SetAsyncValidator(IAsyncPropertyValidator<T, TProperty> validator) {
if (validator == null) throw new ArgumentNullException(nameof(validator));
// See if the async validator supports synchronous execution too.
IPropertyValidator<T, TProperty> fallback = validator as IPropertyValidator<T, TProperty>;
Rule.AddAsyncValidator(validator, fallback);
return this;
}
public IRuleBuilderOptions<T, TProperty> SetValidator(IValidator<TProperty> validator, params string[] ruleSets) {
validator.Guard("Cannot pass a null validator to SetValidator", nameof(validator));
var adaptor = new ChildValidatorAdaptor<T,TProperty>(validator, validator.GetType()) {
RuleSets = ruleSets
};
// ChildValidatorAdaptor supports both sync and async execution.
Rule.AddAsyncValidator(adaptor, adaptor);
return this;
}
public IRuleBuilderOptions<T, TProperty> SetValidator<TValidator>(Func<T, TValidator> validatorProvider, params string[] ruleSets) where TValidator : IValidator<TProperty> {
validatorProvider.Guard("Cannot pass a null validatorProvider to SetValidator", nameof(validatorProvider));
var adaptor = new ChildValidatorAdaptor<T,TProperty>((context, _) => validatorProvider(context.InstanceToValidate), typeof (TValidator)) {
RuleSets = ruleSets
};
// ChildValidatorAdaptor supports both sync and async execution.
Rule.AddAsyncValidator(adaptor, adaptor);
return this;
}
public IRuleBuilderOptions<T, TProperty> SetValidator<TValidator>(Func<T, TProperty, TValidator> validatorProvider, params string[] ruleSets) where TValidator : IValidator<TProperty> {
validatorProvider.Guard("Cannot pass a null validatorProvider to SetValidator", nameof(validatorProvider));
var adaptor = new ChildValidatorAdaptor<T,TProperty>((context, val) => validatorProvider(context.InstanceToValidate, val), typeof (TValidator)) {
RuleSets = ruleSets
};
// ChildValidatorAdaptor supports both sync and async execution.
Rule.AddAsyncValidator(adaptor, adaptor);
return this;
}
IRuleBuilderOptions<T, TProperty> IRuleBuilderOptions<T, TProperty>.DependentRules(Action action) {
var dependencyContainer = new List<IValidationRuleInternal<T>>();
// Capture any rules added to the parent validator inside this delegate.
using (ParentValidator.Rules.Capture(dependencyContainer.Add)) {
action();
}
if (Rule.RuleSets != null && Rule.RuleSets.Length > 0) {
foreach (var dependentRule in dependencyContainer) {
if (dependentRule.RuleSets == null) {
dependentRule.RuleSets = Rule.RuleSets;
}
}
}
Rule.AddDependentRules(dependencyContainer);
return this;
}
public void AddComponent(RuleComponent<T,TProperty> component) {
Rule.Components.Add(component);
}
}
}