// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
#nullable enable
 
using Microsoft.AspNetCore.Mvc.ModelBinding.Metadata;
 
namespace Microsoft.AspNetCore.Mvc.ModelBinding.Validation;
 
/// <summary>
/// An <see cref="IModelValidatorProvider" /> that provides <see cref="IModelValidator"/> instances
/// exclusively using values in <see cref="ModelMetadata.ValidatorMetadata"/> or the model type.
/// <para>
/// <see cref="IMetadataBasedModelValidatorProvider" /> can be used to statically determine if a given
/// <see cref="ModelMetadata"/> instance can incur any validation. The value for <see cref="ModelMetadata.HasValidators"/>
/// can be calculated if all instances in <see cref="MvcOptions.ModelValidatorProviders"/> are <see cref="IMetadataBasedModelValidatorProvider" />.
/// </para>
/// </summary>
public interface IMetadataBasedModelValidatorProvider : IModelValidatorProvider
{
    /// <summary>
    /// Gets a value that determines if the <see cref="IModelValidatorProvider"/> can
    /// produce any validators given the <paramref name="modelType"/> and <paramref name="modelType"/>.
    /// </summary>
    /// <param name="modelType">The <see cref="Type"/> of the model.</param>
    /// <param name="validatorMetadata">The list of metadata items for validators. <seealso cref="ValidationMetadata.ValidatorMetadata"/>.</param>
    /// <returns></returns>
    bool HasValidators(Type modelType, IList<object> validatorMetadata);
}