XPathSelectionIterator.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / XPath / Internal / XPathSelectionIterator.cs / 1 / XPathSelectionIterator.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;
 
    // We need this wrapper object to:
    //      1. Calculate position 
    //      2. Protect internal query.Current from user who may call MoveNext(). 
    internal class XPathSelectionIterator : ResetableIterator {
        private XPathNavigator nav; 
        private Query          query;
        private int            position;

        internal XPathSelectionIterator(XPathNavigator nav, Query query) { 
            this.nav = nav.Clone();
            this.query = query; 
        } 

        protected XPathSelectionIterator(XPathSelectionIterator it) { 
            this.nav   = it.nav.Clone();
            this.query = (Query) it.query.Clone();
            this.position = it.position;
        } 

        public override void Reset() { 
            this.query.Reset(); 
        }
 
        public override bool MoveNext() {
            XPathNavigator n = query.Advance();
 	        if( n != null ) {
                position++; 
                if (!nav.MoveTo(n)) {
		            nav = n.Clone(); 
                } 
                return true;
            } 
            return false;
        }

        public override int            Count      { get { return query.Count; } } 
        public override XPathNavigator Current    { get { return nav; } }
        public override int CurrentPosition       { get { return position;  } } 
        public override XPathNodeIterator Clone() { return new XPathSelectionIterator(this); } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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