mcs/class/System.Web/System.Web/BaseParamsCollection.cs

   1 //
   2 // System.Web.BaseParamsCollection
   3 //
   4 // Authors:
   5 //   Vladimir Krasnov (vladimirk@mainsoft.com)
   6 //
   7 // (C) 2006 Mainsoft Co. (http://www.mainsoft.com)
   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
  29 using System;
  30 using System.Collections.Specialized;
  31 using System.Runtime.Serialization;
  32
  33 namespace System.Web
  34 {
  35         abstract class BaseParamsCollection : WebROCollection
  36         {
  37                 protected HttpRequest _request;
  38                 protected bool _loaded = false;
  39
  40                 public BaseParamsCollection (HttpRequest request)
  41                 {
  42                         _request = request;
  43                         IsReadOnly = true;
  44                 }
  45
  46                 void LoadInfo ()
  47                 {
  48                         if (_loaded)
  49                                 return;
  50                         IsReadOnly = false;
  51
  52                         InsertInfo ();
  53
  54                         IsReadOnly = true;
  55                         _loaded = true;
  56
  57                 }
  58
  59                 protected abstract void InsertInfo ();
  60
  61                 public override string Get (int index)
  62                 {
  63                         LoadInfo ();
  64                         return base.Get (index);
  65                 }
  66
  67                 protected abstract string InternalGet (string name);
  68
  69                 public override string Get (string name)
  70                 {
  71                         if (!_loaded) {
  72                                 string s = InternalGet (name);
  73                                 if (s != null && s.Length > 0)
  74                                         return s;
  75
  76                                 LoadInfo ();
  77                         }
  78
  79                         return base.Get (name);
  80                 }
  81
  82                 public override string GetKey (int index)
  83                 {
  84                         LoadInfo ();
  85                         return base.GetKey (index);
  86                 }
  87
  88                 public override string[] GetValues (int index)
  89                 {
  90                         string text1;
  91                         string[] array1;
  92                         text1 = Get (index);
  93                         if (text1 == null)
  94                                 return null;
  95
  96                         array1 = new string[1];
  97                         array1[0] = text1;
  98                         return array1;
  99                 }
 100
 101                 public override string[] GetValues (string name)
 102                 {
 103                         string text1;
 104                         string[] array1;
 105                         text1 = Get (name);
 106                         if (text1 == null)
 107                                 return null;
 108
 109                         array1 = new string[1];
 110                         array1[0] = text1;
 111                         return array1;
 112                 }
 113
 114                 public override void GetObjectData (SerializationInfo info, StreamingContext context)
 115                 {
 116                         throw new SerializationException ();
 117                 }
 118
 119                 public override string[] AllKeys
 120                 {
 121                         get {
 122                                 LoadInfo ();
 123                                 return base.AllKeys;
 124                         }
 125                 }
 126
 127                 public override int Count
 128                 {
 129                         get {
 130                                 LoadInfo ();
 131                                 return base.Count;
 132                         }
 133                 }
 134
 135                 public override NameObjectCollectionBase.KeysCollection Keys {
 136                         get {
 137                                 LoadInfo ();
 138                                 return base.Keys;
 139                         }
 140                 }
 141
 142                 public override System.Collections.IEnumerator GetEnumerator () {
 143                         LoadInfo ();
 144                         return base.GetEnumerator ();
 145                 }
 146         }
 147 }