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//------------------------------------------------------------------------------
// <copyright file="XmlNavigatorReader.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
//------------------------------------------------------------------------------
using System.IO;
using System.Xml.Schema;
using System.Collections;
using System.Diagnostics;
using MS.Internal.Xml.Cache;
namespace System.Xml.XPath {
internal class XPathNavigatorKeyComparer : IEqualityComparer {
bool IEqualityComparer.Equals( Object obj1, Object obj2 ) {
XPathNavigator nav1 = obj1 as XPathNavigator;
XPathNavigator nav2 = obj2 as XPathNavigator;
if( ( nav1 != null ) && ( nav2 != null ) ) {
if( nav1.IsSamePosition( nav2 ) )
return true;
}
return false;
}
int IEqualityComparer.GetHashCode ( Object obj ) {
int hashCode;
XPathNavigator nav;
XPathDocumentNavigator xpdocNav;
if (obj == null) {
throw new ArgumentNullException("obj");
}
else if ( null != (xpdocNav = obj as XPathDocumentNavigator) ) {
hashCode = xpdocNav.GetPositionHashCode();
}
else if( null != (nav = obj as XPathNavigator) ) {
Object underlyingObject = nav.UnderlyingObject;
if (underlyingObject != null) {
hashCode = underlyingObject.GetHashCode();
}
else {
hashCode = (int)nav.NodeType;
hashCode ^= nav.LocalName.GetHashCode();
hashCode ^= nav.Prefix.GetHashCode();
hashCode ^= nav.NamespaceURI.GetHashCode();
}
}
else {
hashCode = obj.GetHashCode();
}
return hashCode;
}
}
}
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