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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
namespace MS.Internal.Xml.XPath
{
using System;
using Microsoft.Xml;
using Microsoft.Xml.XPath;
using System.Diagnostics;
using System.Globalization;
using System.Collections.Generic;
internal sealed class ParentQuery : CacheAxisQuery
{
public ParentQuery(Query qyInput, string Name, string Prefix, XPathNodeType Type) : base(qyInput, Name, Prefix, Type) { }
private ParentQuery(ParentQuery other) : base(other) { }
public override object Evaluate(XPathNodeIterator context)
{
base.Evaluate(context);
// REVIEW: This algorithm doesn't use the fact that input is DOD.
XPathNavigator input;
while ((input = qyInput.Advance()) != null)
{
input = input.Clone();
if (input.MoveToParent())
{
if (matches(input))
{
Insert(outputBuffer, input);
}
}
}
return this;
}
public override XPathNodeIterator Clone() { return new ParentQuery(this); }
}
}
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