DescendantBaseQuery.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 / DescendantBaseQuery.cs / 1 / DescendantBaseQuery.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;

    internal abstract class DescendantBaseQuery : BaseAxisQuery { 
        protected bool matchSelf;
        protected bool abbrAxis; 
 
        public DescendantBaseQuery(Query qyParent, string Name, string Prefix, XPathNodeType Type, bool matchSelf, bool abbrAxis) : base(qyParent, Name, Prefix, Type)  {
            this.matchSelf = matchSelf; 
            this.abbrAxis  = abbrAxis;
        }
        public DescendantBaseQuery(DescendantBaseQuery other) : base(other) {
            this.matchSelf = other.matchSelf; 
            this.abbrAxis  = other.abbrAxis;
        } 
 
        public override XPathNavigator MatchNode(XPathNavigator context) {
            if (context != null) { 
                if (!abbrAxis) {
                    throw XPathException.Create(Res.Xp_InvalidPattern);
                }
                XPathNavigator result = null; 
                if (matches(context)) {
                    if (matchSelf) { 
                        if ((result = qyInput.MatchNode(context)) != null) { 
                            return result;
                        } 
                    }

                    XPathNavigator anc = context.Clone();
                    while (anc.MoveToParent()) { 
                        if ((result = qyInput.MatchNode(anc)) != null) {
                            return result; 
                        } 
                    }
                } 
            }
            return null;
        }
 
        public override void PrintQuery(XmlWriter w) {
            w.WriteStartElement(this.GetType().Name); 
            if (matchSelf) { 
                w.WriteAttributeString("self", "yes");
            } 
            if (NameTest) {
                w.WriteAttributeString("name", Prefix.Length != 0 ? Prefix + ':' + Name : Name);
            }
            if (TypeTest != XPathNodeType.Element) { 
                w.WriteAttributeString("nodeType", TypeTest.ToString());
            } 
            qyInput.PrintQuery(w); 
            w.WriteEndElement();
        } 
    }
}

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

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