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//
// System.Xml.XPath.XPathComparer
//
// Author:
// Atsushi Enomoto <ginga@kit.hi-ho.ne.jp>
//
// (C) 2003 Atsushi Enomoto
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Xsl;
namespace System.Xml.XPath
{
internal class XPathIteratorComparer : IComparer
{
public static XPathIteratorComparer Instance = new XPathIteratorComparer ();
private XPathIteratorComparer ()
{
}
public int Compare (object o1, object o2)
{
XPathNodeIterator nav1 = o1 as XPathNodeIterator;
XPathNodeIterator nav2 = o2 as XPathNodeIterator;
if (nav1 == null)
return -1;
if (nav2 == null)
return 1;
switch (nav1.Current.ComparePosition (nav2.Current)) {
case XmlNodeOrder.Same:
return 0;
case XmlNodeOrder.After:
return -1;
default:
return 1;
}
}
}
#if NET_2_0
internal class XPathNavigatorComparer : IComparer, IEqualityComparer
#else
internal class XPathNavigatorComparer : IComparer
#endif
{
public static XPathNavigatorComparer Instance = new XPathNavigatorComparer ();
private XPathNavigatorComparer ()
{
}
public int Compare (object o1, object o2)
{
XPathNavigator nav1 = o1 as XPathNavigator;
XPathNavigator nav2 = o2 as XPathNavigator;
if (nav1 == null)
return -1;
if (nav2 == null)
return 1;
switch (nav1.ComparePosition (nav2)) {
case XmlNodeOrder.Same:
return 0;
case XmlNodeOrder.After:
return 1;
default:
return -1;
}
}
#if NET_2_0
bool IEqualityComparer.Equals (object o1, object o2)
{
XPathNavigator nav1 = o1 as XPathNavigator;
XPathNavigator nav2 = o2 as XPathNavigator;
return nav1 != null && nav2 != null && nav1.IsSamePosition (nav2);
}
int IEqualityComparer.GetHashCode (object obj)
{
return obj.GetHashCode ();
}
#endif
}
}
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