AttributeQuery.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 / AttributeQuery.cs / 1 / AttributeQuery.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 AttributeQuery : BaseAxisQuery {
        private bool onAttribute = false; 
 
        public AttributeQuery(Query qyParent, string Name, string Prefix, XPathNodeType Type) : base(qyParent, Name, Prefix, Type) {}
        private AttributeQuery(AttributeQuery other) : base(other) { 
            this.onAttribute = other.onAttribute;
        }
        public override void Reset() {
            onAttribute = false; 
            base.Reset();
        } 
 
        public override XPathNavigator Advance() {
            while (true) { 
                if (! onAttribute) {
                    currentNode = qyInput.Advance();
                    if (currentNode == null) {
                        return null; 
                    }
                    position = 0; 
                    currentNode = currentNode.Clone(); 
                    onAttribute = currentNode.MoveToFirstAttribute();
                } else { 
                    onAttribute = currentNode.MoveToNextAttribute();
                }

                if (onAttribute) { 
                    Debug.Assert(! currentNode.NamespaceURI.Equals(XmlReservedNs.NsXmlNs));
                    if (matches(currentNode)) { 
                        position++; 
                        return currentNode;
                    } 
                }
            } // while
        }
 
        public override XPathNavigator MatchNode(XPathNavigator context) {
            if (context != null) { 
                if (context.NodeType == XPathNodeType.Attribute && matches(context)) { 
                    XPathNavigator temp = context.Clone();
                    if (temp.MoveToParent()) { 
                        return qyInput.MatchNode(temp);
                    }
                }
            } 
            return null;
        } 
 
        public override XPathNodeIterator Clone() { return new AttributeQuery(this); }
    } 
}

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

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