mcs/class/corlib/Mono.Xml/SecurityParser.cs

   1 //
   2 // Mono.Xml.SecurityParser.cs class implementation
   3 //
   4 // Author:
   5 //      Sebastien Pouliot (spouliot@motus.com)
   6 //
   7 // (C) 2003 Motus Technologies Inc. (http://www.motus.com)
   8 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Collections;
  35 using System.Security;
  36
  37 namespace Mono.Xml {
  38
  39         // convert an XML document into SecurityElement objects
  40 #if INSIDE_CORLIB
  41         internal
  42 #else
  43         [CLSCompliant(false)]
  44         public
  45 #endif
  46         class SecurityParser : MiniParser, MiniParser.IHandler, MiniParser.IReader {
  47
  48                 private SecurityElement root;
  49
  50                 public SecurityParser () : base ()
  51                 {
  52                         stack = new Stack ();
  53                 }
  54
  55                 public void LoadXml (string xml)
  56                 {
  57                         root = null;
  58                         xmldoc = xml;
  59                         pos = 0;
  60                         stack.Clear ();
  61                         Parse (this, this);
  62                 }
  63
  64                 public SecurityElement ToXml ()
  65                 {
  66                         return root;
  67                 }
  68
  69                 // IReader
  70
  71                 private string xmldoc;
  72                 private int pos;
  73
  74                 public int Read ()
  75                 {
  76                         if (pos >= xmldoc.Length)
  77                                 return -1;
  78                         return (int) xmldoc [pos++];
  79                 }
  80
  81                 // IHandler
  82
  83                 private SecurityElement current;
  84                 private Stack stack;
  85
  86                 public void OnStartParsing (MiniParser parser) {}
  87
  88                 public void OnStartElement (string name, MiniParser.IAttrList attrs)
  89                 {
  90                         SecurityElement newel = new SecurityElement (name);
  91                         if (root == null) {
  92                                 root = newel;
  93                                 current = newel;
  94                         }
  95                         else {
  96                                 SecurityElement parent = (SecurityElement) stack.Peek ();
  97                                 parent.AddChild (newel);
  98                         }
  99                         stack.Push (newel);
 100                         current = newel;
 101                         // attributes
 102                         int n = attrs.Length;
 103                         for (int i=0; i < n; i++)
 104                                 current.AddAttribute (attrs.GetName (i), attrs.GetValue (i));
 105                 }
 106
 107                 public void OnEndElement (string name)
 108                 {
 109                         current = (SecurityElement) stack.Pop ();
 110                 }
 111
 112                 public void OnChars (string ch)
 113                 {
 114                         current.Text = ch;
 115                 }
 116
 117                 public void OnEndParsing (MiniParser parser) {}
 118         }
 119 }