// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace Microsoft.AspNetCore.Mvc.ActionConstraints;
 
/// <summary>
/// A factory for <see cref="IActionConstraint"/>.
/// </summary>
/// <remarks>
/// <see cref="IActionConstraintFactory"/> will be invoked during action selection
/// to create constraint instances for an action.
///
/// Place an attribute implementing this interface on a controller or action to insert an action
/// constraint created by a factory.
/// </remarks>
public interface IActionConstraintFactory : IActionConstraintMetadata
{
    /// <summary>
    /// Gets a value that indicates if the result of <see cref="CreateInstance(IServiceProvider)"/>
    /// can be reused across requests.
    /// </summary>
    bool IsReusable { get; }
 
    /// <summary>
    /// Creates a new <see cref="IActionConstraint"/>.
    /// </summary>
    /// <param name="services">The per-request services.</param>
    /// <returns>An <see cref="IActionConstraint"/>.</returns>
    IActionConstraint CreateInstance(IServiceProvider services);
}