Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / XPath / Internal / ContextQuery.cs / 1 / ContextQuery.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace MS.Internal.Xml.XPath { using System; using System.Xml; using System.Xml.XPath; using System.Diagnostics; internal class ContextQuery : Query { protected XPathNavigator contextNode; public ContextQuery() { this.count = 0; } protected ContextQuery(ContextQuery other) : base(other) { this.contextNode = other.contextNode; // Don't need to clone here } public override void Reset() { count = 0; } public override XPathNavigator Current { get { return contextNode; } } public override object Evaluate(XPathNodeIterator context) { contextNode = context.Current; // We don't clone here. Because we never move it. count = 0; return this; } public override XPathNavigator Advance() { if (count == 0) { count = 1; return contextNode; } return null; } public override XPathNavigator MatchNode(XPathNavigator current) { return current; } public override XPathNodeIterator Clone() { return new ContextQuery(this); } public override XPathResultType StaticType { get { return XPathResultType.NodeSet; } } public override int CurrentPosition { get { return count; } } public override int Count { get { return 1; } } public override QueryProps Properties { get { return QueryProps.Merge | QueryProps.Cached | QueryProps.Position | QueryProps.Count; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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