Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / XPath / Internal / NamespaceQuery.cs / 1 / NamespaceQuery.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.Globalization; internal sealed class NamespaceQuery : BaseAxisQuery { private bool onNamespace; public NamespaceQuery(Query qyParent, string Name, string Prefix, XPathNodeType Type) : base(qyParent, Name, Prefix, Type) {} private NamespaceQuery(NamespaceQuery other) : base(other) { this.onNamespace = other.onNamespace; } public override void Reset() { onNamespace = false; base.Reset(); } public override XPathNavigator Advance() { while (true) { if (!onNamespace) { currentNode = qyInput.Advance(); if (currentNode == null) { return null; } position = 0; currentNode = currentNode.Clone(); onNamespace = currentNode.MoveToFirstNamespace(); } else { onNamespace = currentNode.MoveToNextNamespace(); } if (onNamespace) { if (matches(currentNode)) { position++; return currentNode; } } } // while } // Advance public override bool matches(XPathNavigator e) { Debug.Assert(e.NodeType == XPathNodeType.Namespace); if (e.Value.Length == 0) { Debug.Assert(e.LocalName.Length == 0, "Only xmlns='' can have empty string as a value"); // Namespace axes never returns xmlns='', // because it's not a NS declaration but rather undeclaration. return false; } if (NameTest) { return Name.Equals(e.LocalName); } else { return true; } } public override XPathNodeIterator Clone() { return new NamespaceQuery(this); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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