// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Collections.Generic;
using System.Composition.Convention;
using System.Reflection;
 
namespace System.Composition.TypedParts.Util
{
    internal sealed class DirectAttributeContext : AttributedModelProvider
    {
        public override IEnumerable<Attribute> GetCustomAttributes(Type reflectedType, Reflection.MemberInfo member)
        {
            if (reflectedType == null) throw new ArgumentNullException(nameof(reflectedType));
            if (member == null) throw new ArgumentNullException(nameof(member));
 
            if (!(member is TypeInfo) && member.DeclaringType != reflectedType)
                return Array.Empty<Attribute>();
 
            return Attribute.GetCustomAttributes(member, false);
        }
 
        public override IEnumerable<Attribute> GetCustomAttributes(Type reflectedType, Reflection.ParameterInfo parameter)
        {
            if (parameter is null)
            {
                throw new ArgumentNullException(nameof(parameter));
            }
 
            if (reflectedType == null) throw new ArgumentNullException(nameof(reflectedType));
 
            return Attribute.GetCustomAttributes(parameter, false);
        }
    }
}