Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Xml / System / Xml / Dom / XPathNodeList.cs / 1305376 / XPathNodeList.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace System.Xml { using System.Xml.XPath; using System.Diagnostics; using System.Collections; using System.Collections.Generic; internal class XPathNodeList: XmlNodeList { Listlist; XPathNodeIterator nodeIterator; bool done; public XPathNodeList(XPathNodeIterator nodeIterator) { this.nodeIterator = nodeIterator; this.list = new List (); this.done = false; } public override int Count { get { if (! done) { ReadUntil(Int32.MaxValue); } return list.Count; } } private static readonly object[] nullparams = {}; private XmlNode GetNode(XPathNavigator n) { IHasXmlNode iHasNode = (IHasXmlNode) n; return iHasNode.GetNode(); } internal int ReadUntil(int index) { int count = list.Count; while (! done && count <= index) { if (nodeIterator.MoveNext()) { XmlNode n = GetNode(nodeIterator.Current); if (n != null) { list.Add(n); count++; } } else { done = true; break; } } return count; } public override XmlNode Item(int index) { if (list.Count <= index) { ReadUntil(index); } if (index < 0 || list.Count <= index) { return null; } return list[index]; } public override IEnumerator GetEnumerator() { return new XmlNodeListEnumerator(this); } } internal class XmlNodeListEnumerator : IEnumerator { XPathNodeList list; int index; bool valid; public XmlNodeListEnumerator(XPathNodeList list) { this.list = list; this.index = -1; this.valid = false; } public void Reset() { index = -1; } public bool MoveNext() { index++; int count = list.ReadUntil(index + 1); // read past for delete-node case if (count - 1 < index) { return false; } valid = (list[index] != null); return valid; } public object Current { get { if (valid) { return list[index]; } return null; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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