IDQuery.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 / IDQuery.cs / 1 / IDQuery.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
namespace MS.Internal.Xml.XPath { 
    using System;
    using System.Xml; 
    using System.Xml.XPath;
    using System.Xml.Xsl;
    using System.Diagnostics;
    using System.Collections.Generic; 

    internal sealed class IDQuery : CacheOutputQuery { 
 
        public IDQuery(Query arg) : base(arg) {}
        private IDQuery(IDQuery other) : base(other) { } 

        public override object Evaluate(XPathNodeIterator context) {
            object argVal = base.Evaluate(context);
            XPathNavigator contextNode = context.Current.Clone(); 

            switch (GetXPathType(argVal)) { 
            case XPathResultType.NodeSet: 
                XPathNavigator temp;
                while ((temp = input.Advance()) != null) { 
                    ProcessIds(contextNode, temp.Value);
                }
                break;
            case XPathResultType.String: 
                ProcessIds(contextNode, (string)argVal);
                break; 
            case XPathResultType.Number: 
                ProcessIds(contextNode, StringFunctions.toString((double)argVal));
                break; 
            case XPathResultType.Boolean:
                ProcessIds(contextNode, StringFunctions.toString((bool)argVal));
                break;
            case XPathResultType_Navigator: 
                ProcessIds(contextNode, ((XPathNavigator)argVal).Value);
                break; 
            } 
            return this;
        } 

        void ProcessIds(XPathNavigator contextNode, string val) {
            string[] ids = XmlConvert.SplitString(val);
            for (int idx = 0; idx < ids.Length; idx++) { 
                if (contextNode.MoveToId(ids[idx])) {
                    Insert(outputBuffer, contextNode); 
                } 
            }
        } 

        public override XPathNavigator MatchNode(XPathNavigator context) {
            Evaluate(new XPathSingletonIterator(context, /*moved:*/true));
            XPathNavigator result; 
            while ((result = Advance()) != null) {
                if (result.IsSamePosition(context)) { 
                    return context; 
                }
            } 
            return null;
        }

        public override XPathNodeIterator Clone() { return new IDQuery(this); } 
    }
} 

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

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK