Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / XmlUtils / System / Xml / Xsl / Runtime / XmlILIndex.cs / 1305376 / XmlILIndex.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- using System.Collections.Generic; using System.ComponentModel; using System.Diagnostics; using System.Xml.XPath; namespace System.Xml.Xsl.Runtime { ////// This class manages nodes from one input document, indexed by key value(s). /// [EditorBrowsable(EditorBrowsableState.Never)] public sealed class XmlILIndex { private Dictionarytable; /// /// This constructor is internal so that external users cannot construct it (and therefore we do not have to test it separately). /// internal XmlILIndex() { this.table = new Dictionary(); } /// /// Add a node indexed by the specified key value. /// public void Add(string key, XPathNavigator navigator) { XmlQueryNodeSequence seq; if (!this.table.TryGetValue(key, out seq)) { // Create a new sequence and add it to the index seq = new XmlQueryNodeSequence(); seq.AddClone(navigator); this.table.Add(key, seq); } else { // The nodes are guaranteed to be added in document order with possible duplicates. // Add node to the existing sequence if it differs from the last one. Debug.Assert(navigator.ComparePosition(seq[seq.Count - 1]) >= 0, "Index nodes must be added in document order"); if (!navigator.IsSamePosition(seq[seq.Count - 1])) { seq.AddClone(navigator); } } } ////// Lookup a sequence of nodes that are indexed by the specified key value. /// Return a non-null empty sequence, if there are no nodes associated with the key. /// public XmlQueryNodeSequence Lookup(string key) { XmlQueryNodeSequence seq; if (!this.table.TryGetValue(key, out seq)) seq = new XmlQueryNodeSequence(); return seq; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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