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