Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / XPath / Internal / MergeFilterQuery.cs / 1 / MergeFilterQuery.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; using System.Xml.Xsl; using System.Collections.Generic; internal sealed class MergeFilterQuery : CacheOutputQuery { private Query child; public MergeFilterQuery(Query input, Query child) : base(input) { this.child = child; } private MergeFilterQuery(MergeFilterQuery other) : base(other) { this.child = Clone(other.child); } public override void SetXsltContext(XsltContext xsltContext) { base.SetXsltContext(xsltContext); child.SetXsltContext(xsltContext); } public override object Evaluate(XPathNodeIterator nodeIterator) { base.Evaluate(nodeIterator); while (input.Advance() != null) { child.Evaluate(input); XPathNavigator node; while ((node = child.Advance()) != null) { Insert(outputBuffer, node); } } return this; } public override XPathNavigator MatchNode(XPathNavigator current) { XPathNavigator context = child.MatchNode(current); if (context == null) { return null; } context = input.MatchNode(context); if (context == null) { return null; } Evaluate(new XPathSingletonIterator(context.Clone(), /*moved:*/true)); XPathNavigator result = Advance(); while (result != null) { if (result.IsSamePosition(current)) { return context; } result = Advance(); } return null; } public override XPathNodeIterator Clone() { return new MergeFilterQuery(this); } public override void PrintQuery(XmlWriter w) { w.WriteStartElement(this.GetType().Name); input.PrintQuery(w); child.PrintQuery(w); w.WriteEndElement(); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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