// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System;
using Microsoft.Extensions.Primitives;
 
namespace Microsoft.Extensions.FileProviders.Embedded.Manifest;
 
internal abstract class ManifestEntry
{
    public ManifestEntry(string name)
    {
        Name = name;
    }
 
    public ManifestEntry? Parent { get; private set; }
 
    public string Name { get; }
 
    public static ManifestEntry UnknownPath { get; } = ManifestSinkDirectory.Instance;
 
    protected internal virtual void SetParent(ManifestDirectory directory)
    {
        if (Parent != null)
        {
            throw new InvalidOperationException("Directory already has a parent.");
        }
 
        Parent = directory;
    }
 
    public abstract ManifestEntry Traverse(StringSegment segment);
}