2 // System.Xml.XPath.XPathComparer
5 // Atsushi Enomoto <ginga@kit.hi-ho.ne.jp>
7 // (C) 2003 Atsushi Enomoto
11 // Permission is hereby granted, free of charge, to any person obtaining
12 // a copy of this software and associated documentation files (the
13 // "Software"), to deal in the Software without restriction, including
14 // without limitation the rights to use, copy, modify, merge, publish,
15 // distribute, sublicense, and/or sell copies of the Software, and to
16 // permit persons to whom the Software is furnished to do so, subject to
17 // the following conditions:
19 // The above copyright notice and this permission notice shall be
20 // included in all copies or substantial portions of the Software.
22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 using System.Collections;
34 using System.Xml.XPath;
37 namespace System.Xml.XPath
39 internal class XPathIteratorComparer : IComparer
41 public static XPathIteratorComparer Instance = new XPathIteratorComparer ();
42 private XPathIteratorComparer ()
46 public int Compare (object o1, object o2)
48 BaseIterator nav1 = o1 as BaseIterator;
49 BaseIterator nav2 = o2 as BaseIterator;
54 switch (nav1.Current.ComparePosition (nav2.Current)) {
55 case XmlNodeOrder.Same:
57 case XmlNodeOrder.After:
66 internal class XPathNavigatorComparer : IComparer, IEqualityComparer
68 internal class XPathNavigatorComparer : IComparer
71 public static XPathNavigatorComparer Instance = new XPathNavigatorComparer ();
72 private XPathNavigatorComparer ()
76 public int Compare (object o1, object o2)
78 XPathNavigator nav1 = o1 as XPathNavigator;
79 XPathNavigator nav2 = o2 as XPathNavigator;
84 switch (nav1.ComparePosition (nav2)) {
85 case XmlNodeOrder.Same:
87 case XmlNodeOrder.After:
95 public bool Equals (object o1, object o2)
97 XPathNavigator nav1 = o1 as XPathNavigator;
98 XPathNavigator nav2 = o2 as XPathNavigator;
99 if (nav1 != null && nav2 != null)
100 return nav1.IsSamePosition (nav2);
105 public int GetHashCode (object obj)
107 return obj.GetHashCode ();