mcs/class/System.XML/Mono.Xml.Xsl/XslKey.cs

   1 //
   2 // XslKey.cs
   3 //
   4 // Authors:
   5 //      Ben Maurer (bmaurer@users.sourceforge.net)
   6 //      Atsushi Enomoto (ginga@kit.hi-ho.ne.jp)
   7 //
   8 // (C) 2003 Ben Maurer
   9 // (C) 2003 Atsushi Enomoto
  10 //
  11
  12 using System;
  13 using System.CodeDom;
  14 using System.Collections;
  15 using System.Collections.Specialized;
  16 using System.Xml;
  17 using System.Xml.Schema;
  18 using System.Xml.XPath;
  19 using System.Xml.Xsl;
  20
  21 using QName = System.Xml.XmlQualifiedName;
  22
  23 namespace Mono.Xml.Xsl {
  24         public class XslKey {
  25                 QName name;
  26                 XPathExpression usePattern;
  27                 XPathExpression matchPattern;
  28
  29                 public XslKey (Compiler c)
  30                 {
  31                         this.name = c.ParseQNameAttribute ("name");
  32
  33                         usePattern = c.CompileExpression (c.GetAttribute ("use"));
  34                         if (usePattern == null)
  35                                 usePattern = c.CompileExpression (".");
  36
  37                         c.AssertAttribute ("match");
  38                         this.matchPattern = c.CompileExpression (c.GetAttribute ("match"));
  39                 }
  40
  41                 public QName Name { get { return name; }}
  42                 public XPathExpression UsePattern { get { return usePattern; }}
  43                 public XPathExpression MatchPattern { get { return matchPattern; }}
  44
  45                 public bool Matches (XPathNavigator nav, string value)
  46                 {
  47
  48                         if (!nav.Matches (MatchPattern))
  49                                 return false;
  50                         Debug.WriteLine ("? " + nav.Name);
  51                         switch (UsePattern.ReturnType)
  52                         {
  53                         case XPathResultType.NodeSet:
  54                                 XPathNodeIterator matches = nav.Select (UsePattern);
  55                                 while (matches.MoveNext ()) {
  56                                         if (matches.Current.Value == value)
  57                                                 return true;
  58                                 }
  59
  60                                 return false;
  61                         case XPathResultType.Any:
  62
  63                                 object o = nav.Evaluate (UsePattern);
  64                                 if (o is XPathNodeIterator) {
  65                                         XPathNodeIterator it = (XPathNodeIterator)o;
  66                                         while (it.MoveNext ())
  67                                                 if (it.Current.Value == value)
  68                                                         return true;
  69                                         return false;
  70                                 } else {
  71                                         return value == XPathFunctions.ToString (o);
  72                                 }
  73                         default:
  74                                 return value == nav.EvaluateString (UsePattern, null, null);
  75                         }
  76                 }
  77         }
  78 }