mcs/class/Mono.Xml.Ext/Mono.Xml.XPath2/XQueryCommandImpl.cs

   1 //
   2 // XQueryCommandImpl.cs - core XQueryCommand implementation in System.Xml.dll
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 //
   8 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 #if NET_2_0
  31 using System;
  32 using System.Collections;
  33 using System.IO;
  34 using System.Reflection;
  35 using System.Security.Policy;
  36 using System.Xml;
  37 using System.Xml.Query;
  38 using System.Xml.XPath;
  39 using Mono.Xml.XPath2;
  40 using Mono.Xml.XQuery.Parser;
  41
  42 namespace Mono.Xml.XPath2
  43 {
  44         public class XQueryCommandImpl
  45         {
  46                 MethodInfo xqueryCommandOnMessageEventMethod;
  47
  48                 MethodInfo GetEventHandler (object qobj)
  49                 {
  50                         if (xqueryCommandOnMessageEventMethod == null) {
  51                                 EventInfo ei = qobj.GetType ().GetEvent ("OnMessageEvent");
  52                                 xqueryCommandOnMessageEventMethod = ei.GetRaiseMethod (true);
  53                         }
  54                         return xqueryCommandOnMessageEventMethod;
  55                 }
  56
  57                 XQueryStaticContext staticContext;
  58                 object xqueryCommand;
  59
  60                 public XQueryCommandImpl ()
  61                 {
  62                 }
  63
  64                 public void Compile (TextReader input, Evidence evidence, object xqueryCommand)
  65                 {
  66                         staticContext = XQueryASTCompiler.Compile (XQueryParser.Parse (input), null, evidence, this);
  67                         this.xqueryCommand = xqueryCommand;
  68                         // FIXME: generate executable assembly, and load it with evidence.
  69                 }
  70
  71                 public void Execute (XPathNavigator input, XmlResolver resolver, XmlArgumentList args, XmlWriter writer)
  72                 {
  73                         if (staticContext == null)
  74                                 throw new XmlQueryException ("Query string is not compiled.");
  75                         // Initialize event handler method info.
  76                         xqueryCommandOnMessageEventMethod = null;
  77
  78                         XQueryContext ctx = new XQueryContext (new XQueryContextManager (staticContext, input, writer, resolver, args));
  79
  80                         XPathSequence iter = new SingleItemIterator (input, ctx);
  81
  82                         foreach (ExprSingle expr in staticContext.QueryBody)
  83                                 expr.Serialize (iter);
  84                 }
  85
  86                 internal void ProcessMessageEvent (object sender, QueryEventArgs e)
  87                 {
  88                         // FIXME: how to handle event raise method?
  89                         throw new NotImplementedException ();
  90                         /*
  91                         MethodInfo mi = GetEventHandler (xqueryCommand);
  92                         if (mi != null)
  93                                 mi.Invoke (xqueryCommand, new object [] {sender, e});
  94                         */
  95                 }
  96         }
  97
  98 }
  99
 100 #endif