beagled/Flavor.cs

   1 //
   2 // Flavor.cs
   3 //
   4 // Copyright (C) 2004 Novell, Inc.
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a
   9 // copy of this software and associated documentation files (the "Software"),
  10 // to deal in the Software without restriction, including without limitation
  11 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12 // and/or sell copies of the Software, and to permit persons to whom the
  13 // Software is furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24 // DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.IO;
  29 using System.Collections;
  30
  31 using Beagle.Util;
  32
  33 namespace Beagle.Daemon {
  34
  35         public class FilterFlavor {
  36
  37                 private string uri = null;
  38                 private string mime_type = null;
  39                 private string extension = null;
  40
  41                 private int priority = 0;
  42
  43                 public string Uri {
  44                         get { return uri; }
  45                         set { uri = IsWild (value) ? null : value; }
  46                 }
  47
  48                 public string Extension {
  49                         get { return extension; }
  50                         set { extension = IsWild (value) ? null : value; }
  51                 }
  52
  53                 public string MimeType {
  54                         get { return mime_type; }
  55                         set { mime_type = IsWild (value) ? null : value; }
  56                 }
  57
  58                 public int Priority {
  59                         get { return priority; }
  60                         set { priority = value; }
  61                 }
  62
  63                 public FilterFlavor (string uri, string extension, string mime_type, int priority)
  64                 {
  65                         this.uri = uri;
  66                         this.extension = extension;
  67                         this.mime_type = mime_type;
  68                         this.priority = priority;
  69                 }
  70
  71                 private bool IsWild (string str)
  72                 {
  73                         if (str == null)
  74                                 return true;
  75                         if (str == "")
  76                                 return false;
  77                         foreach (char c in str)
  78                                 if (c != '*')
  79                                         return false;
  80                         return true;
  81                 }
  82
  83                 public bool IsMatch (Uri uri, string extension, string mime_type)
  84                 {
  85                         if (Uri != null && (uri == null || !StringFu.GlobMatch (Uri, uri.ToString ())))
  86                                 return false;
  87
  88                         if (Extension != null && (extension == null || !StringFu.GlobMatch (Extension, extension)))
  89                                 return false;
  90
  91                         if (MimeType != null && (mime_type == null || !StringFu.GlobMatch (MimeType, mime_type)))
  92                                 return false;
  93
  94                         return true;
  95                 }
  96
  97                 public int Weight
  98                 {
  99                         get {
 100                                 int weight = priority;
 101
 102                                 if (Uri != null)
 103                                         weight += 1;
 104                                 if (Extension != null)
 105                                         weight += 1;
 106                                 if (MimeType != null)
 107                                         weight += 1;
 108
 109                                 return weight;
 110                         }
 111                 }
 112
 113                 ////////////////////////////////////////////
 114
 115                 public override string ToString ()
 116                 {
 117                         string ret = "";
 118
 119                         if (Uri != null)
 120                                 ret += String.Format ("Uri: {0}", Uri);
 121
 122                         if (Extension != null)
 123                                 ret += String.Format ("Extension: {0}", Extension);
 124
 125                         if (MimeType != null)
 126                                 ret += String.Format ("MimeType: {0}", MimeType);
 127
 128                         return ret;
 129                 }
 130
 131                 public class WeightComparer : IComparer
 132                 {
 133                         public int Compare (object obj1, object obj2)
 134                         {
 135                                 FilterFlavor flav1 = (FilterFlavor) obj1;
 136                                 FilterFlavor flav2 = (FilterFlavor) obj2;
 137
 138                                 return flav1.Weight.CompareTo (flav2.Weight);
 139                         }
 140                 }
 141
 142                 public class Hasher : IHashCodeProvider
 143                 {
 144                         public int GetHashCode (object o)
 145                         {
 146                                 return o.ToString ().GetHashCode ();
 147                         }
 148                 }
 149
 150                 static WeightComparer the_comparer = new WeightComparer ();
 151                 static Hasher the_hasher = new Hasher ();
 152
 153                 public static Hashtable NewHashtable ()
 154                 {
 155                         return new Hashtable (the_hasher, the_comparer);
 156                 }
 157
 158                 ////////////////////////////////////////////
 159
 160                 public static FilterFlavor NewFromMimeType (string mime_type) {
 161                         return new FilterFlavor (null, null, mime_type, 0);
 162                 }
 163
 164                 public static FilterFlavor NewFromExtension (string extension) {
 165                         return new FilterFlavor (null, extension, null, 0);
 166                 }
 167         }
 168 }