XPathNavigatorExtensions.cs

using System.Linq;
using System.Xml.XPath;

namespace Swashbuckle.AspNetCore.SwaggerGen;

internal static class XPathNavigatorExtensions
{
    private const string EmptyNamespace = "";

    internal static XPathNodeIterator SelectChildren(this XPathNavigator navigator, string name)
    {
        return navigator.SelectChildren(name, EmptyNamespace);
    }

    internal static string GetAttribute(this XPathNavigator navigator, string name)
    {
        return navigator.GetAttribute(name, EmptyNamespace);
    }

    internal static XPathNavigator SelectFirstChild(this XPathNavigator navigator, string name)
    {
        return navigator.SelectChildren(name, EmptyNamespace)
                ?.OfType<XPathNavigator>()
                .FirstOrDefault();
    }

    internal static XPathNavigator SelectFirstChildWithAttribute(this XPathNavigator navigator, string childName, string attributeName, string attributeValue)
    {
        return navigator.SelectChildren(childName, EmptyNamespace)
                ?.OfType<XPathNavigator>()
                .FirstOrDefault(n => n.GetAttribute(attributeName, EmptyNamespace) == attributeValue);
    }
}