2 // System.Xml.XPath.XPathExpression
5 // Jason Diamond (jason@injektilo.org)
7 // (C) 2002 Jason Diamond http://injektilo.org/
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
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28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 using System.Collections;
36 using NSResolver = System.Xml.IXmlNamespaceResolver;
38 using NSResolver = System.Xml.XmlNamespaceManager;
41 namespace System.Xml.XPath
43 public abstract class XPathExpression
47 internal XPathExpression ()
55 public abstract string Expression { get; }
57 public abstract XPathResultType ReturnType { get; }
63 public abstract void AddSort (object expr, IComparer comparer);
65 public abstract void AddSort (
68 XmlCaseOrder caseOrder,
73 public abstract XPathExpression Clone ();
75 public abstract void SetContext (XmlNamespaceManager nsManager);
82 static XPathExpression Compile (string xpath)
84 return Compile (xpath, null, null);
88 public static XPathExpression Compile (
89 string xpath, NSResolver nsmgr)
91 return Compile (xpath, nsmgr, null);
95 internal static XPathExpression Compile (string xpath,
96 NSResolver nsmgr, IStaticXsltContext ctx)
98 XPathExpression x = ExpressionCache.Get (xpath, ctx);
100 XPathParser parser = new XPathParser (ctx);
101 x = new CompiledExpression (xpath, parser.Compile (xpath));
102 ExpressionCache.Set (xpath, ctx, x);
104 x.SetContext (nsmgr);
109 public abstract void SetContext (IXmlNamespaceResolver nsResolver);