mcs/class/System.Configuration/System.Configuration/ConfigurationLocationCollection.cs

   1 //
   2 // System.Configuration.ConfigurationLocation.cs
   3 //
   4 // Authors:
   5 //      Duncan Mak (duncan@ximian.com)
   6 //
   7 // Permission is hereby granted, free of charge, to any person obtaining
   8 // a copy of this software and associated documentation files (the
   9 // "Software"), to deal in the Software without restriction, including
  10 // without limitation the rights to use, copy, modify, merge, publish,
  11 // distribute, sublicense, and/or sell copies of the Software, and to
  12 // permit persons to whom the Software is furnished to do so, subject to
  13 // the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be
  16 // included in all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  22 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25 //
  26 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  27 //
  28
  29 using System.Collections;
  30
  31 namespace System.Configuration {
  32
  33         public class ConfigurationLocationCollection : ReadOnlyCollectionBase
  34         {
  35                 internal ConfigurationLocationCollection ()
  36                 {
  37                 }
  38
  39                 public ConfigurationLocation this [int index] {
  40                         get { return InnerList [index] as ConfigurationLocation; }
  41                 }
  42
  43                 internal void Add (ConfigurationLocation loc)
  44                 {
  45                         InnerList.Add (loc);
  46                 }
  47
  48                 internal ConfigurationLocation Find (string location)
  49                 {
  50                         foreach (ConfigurationLocation loc in InnerList)
  51                                 if (String.Compare (loc.Path, location, StringComparison.OrdinalIgnoreCase) == 0)
  52                                         return loc;
  53                         return null;
  54                 }
  55
  56                 internal ConfigurationLocation FindBest (string location)
  57                 {
  58                         if(String.IsNullOrEmpty (location))
  59                                 return null;
  60
  61                         ConfigurationLocation bestMatch = null;
  62                         int locationlen = location.Length;
  63                         int bestmatchlen = 0;
  64
  65                         foreach (ConfigurationLocation loc in InnerList) {
  66                                 string lpath = loc.Path;
  67                                 if (String.IsNullOrEmpty (lpath))
  68                                         continue;
  69
  70                                 int lpathlen = lpath.Length;
  71                                 if (location.StartsWith (lpath, StringComparison.OrdinalIgnoreCase)) {
  72                                         // Exact match always takes precedence
  73                                         if (locationlen == lpathlen)
  74                                                 return loc;
  75
  76                                         // ensure path based comparisons consider full directory names (i.e. so 'admin' does not match an 'administration' path)
  77                                         if(locationlen > lpathlen && location [lpathlen] != '/')
  78                                                 continue;
  79
  80                                         if(bestMatch == null)
  81                                                 bestMatch = loc;
  82                                         else if (bestmatchlen < lpathlen) {
  83                                                 bestMatch = loc;
  84                                                 bestmatchlen = lpathlen;
  85                                         }
  86                                 }
  87                         }
  88
  89                         return bestMatch;
  90                 }
  91         }
  92 }
  93