tools/mconfig/Mono.MonoConfig/DefaultNodeHandler.cs

   1 //
   2 // Authors:
   3 //   Marek Habersack (mhabersack@novell.com)
   4 //
   5 // (C) 2007 Novell, Inc
   6 //
   7
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28 using System;
  29 using System.Collections.Generic;
  30 using System.Text;
  31 using System.Xml;
  32 using System.Xml.XPath;
  33
  34 namespace Mono.MonoConfig
  35 {
  36         class DefaultNode
  37         {
  38                 string contents;
  39                 FeatureTarget target;
  40
  41                 public string Contents {
  42                         get { return contents; }
  43                 }
  44
  45                 public FeatureTarget Target {
  46                         get { return target; }
  47                 }
  48
  49                 public DefaultNode (string contents, FeatureTarget target)
  50                 {
  51                         this.contents = contents;
  52                         this.target = target;
  53                 }
  54         }
  55
  56         public class DefaultNodeHandler : IDocumentNodeHandler, IDefaultContainer, IStorageConsumer
  57         {
  58                 string section;
  59                 string contents;
  60                 FeatureTarget target;
  61
  62                 Dictionary <string, DefaultNode> storage;
  63
  64                 public void ReadConfiguration (XPathNavigator nav)
  65                 {
  66                         section = Helpers.GetRequiredNonEmptyAttribute (nav, "section");
  67                         target = Helpers.ConvertEnum <FeatureTarget>  (Helpers.GetRequiredNonEmptyAttribute (nav, "target"), "target");
  68
  69                         XPathNodeIterator iter = nav.Select ("./text()");
  70                         StringBuilder sb = new StringBuilder ();
  71
  72                         while (iter.MoveNext ())
  73                                 sb.Append (iter.Current.Value);
  74                         if (sb.Length > 0)
  75                                 contents = sb.ToString ();
  76                 }
  77
  78                 public void StoreConfiguration ()
  79                 {
  80                         AssertStorage ();
  81
  82                         DefaultNode dn = new DefaultNode (contents, target);
  83
  84                         if (storage.ContainsKey (section))
  85                                 storage [section] = dn;
  86                         else
  87                                 storage.Add (section, dn);
  88
  89                         section = null;
  90                         contents = null;
  91                         storage = null;
  92                 }
  93
  94                 public string FindDefault (string sectionName, FeatureTarget target)
  95                 {
  96                         AssertStorage ();
  97
  98                         if (storage.ContainsKey (sectionName)) {
  99                                 DefaultNode dn = storage [sectionName];
 100
 101                                 if (target == FeatureTarget.Any || dn.Target == FeatureTarget.Any || dn.Target == target)
 102                                         return dn.Contents;
 103                         }
 104
 105                         return null;
 106                 }
 107
 108                 public void SetStorage (object storage)
 109                 {
 110                         this.storage = storage as Dictionary <string, DefaultNode>;
 111                         if (this.storage == null)
 112                                 throw new ApplicationException ("Invalid storage type");
 113                 }
 114
 115                 void AssertStorage ()
 116                 {
 117                         if (storage == null)
 118                                 throw new ApplicationException ("No storage attached");
 119                 }
 120         }
 121 }