NamespaceQuery.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 / NamespaceQuery.cs / 1 / NamespaceQuery.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;
 
    internal sealed class NamespaceQuery : BaseAxisQuery {
        private bool onNamespace; 
 
        public NamespaceQuery(Query qyParent, string Name, string Prefix, XPathNodeType Type) : base(qyParent, Name, Prefix, Type) {}
        private NamespaceQuery(NamespaceQuery other) : base(other) { 
            this.onNamespace = other.onNamespace;
        }

        public override void Reset() { 
            onNamespace = false;
            base.Reset(); 
        } 

        public override XPathNavigator Advance() { 
            while (true) {
                if (!onNamespace) {
                    currentNode = qyInput.Advance();
                    if (currentNode == null) { 
                        return null;
                    } 
                    position = 0; 
                    currentNode = currentNode.Clone();
                    onNamespace = currentNode.MoveToFirstNamespace(); 
                } else {
                    onNamespace = currentNode.MoveToNextNamespace();
                }
 
                if (onNamespace) {
                    if (matches(currentNode)) { 
                        position++; 
                        return currentNode;
                    } 
                }
            } // while
        } // Advance
 
        public override bool matches(XPathNavigator e) {
            Debug.Assert(e.NodeType == XPathNodeType.Namespace); 
            if (e.Value.Length == 0) { 
                Debug.Assert(e.LocalName.Length == 0, "Only xmlns='' can have empty string as a value");
                // Namespace axes never returns xmlns='', 
                // because it's not a NS declaration but rather undeclaration.
                return false;
            }
            if (NameTest) { 
                return Name.Equals(e.LocalName);
            } else { 
                return true; 
            }
        } 

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

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

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