mcs/class/corlib/System.Resources/ResourceSet.cs

   1 //
   2 // System.Resources.ResourceSet.cs
   3 //
   4 // Authors:
   5 //      Duncan Mak (duncan@ximian.com)
   6 //      Dick Porter (dick@ximian.com)
   7 //      Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   8 //
   9 // (C) 2001, 2002 Ximian, Inc.          http://www.ximian.com
  10 //
  11
  12 using System.Collections;
  13 using System.IO;
  14 using System.Globalization;
  15 using System.Runtime.InteropServices;
  16
  17 namespace System.Resources
  18 {
  19         [Serializable]
  20         public class ResourceSet : IDisposable
  21
  22 #if (NET_1_1)
  23                                                 , IEnumerable
  24 #endif
  25
  26         {
  27
  28                 protected IResourceReader Reader;
  29                 protected Hashtable Table;
  30
  31                 // Constructors
  32                 protected ResourceSet () {}
  33
  34                 public ResourceSet (IResourceReader reader)
  35                 {
  36                         if (reader == null)
  37                                 throw new ArgumentNullException ("The reader is null.");
  38                         Reader = reader;
  39                 }
  40
  41                 public ResourceSet (Stream stream)
  42                 {
  43                         if(stream==null) {
  44                                 throw new ArgumentNullException("stream is null");
  45                         }
  46
  47                         if(!stream.CanRead) {
  48                                 throw new ArgumentException("stream is not readable");
  49                         }
  50
  51                         Reader = new ResourceReader (stream);
  52                 }
  53
  54                 public ResourceSet (String fileName)
  55                 {
  56                         if(fileName==null) {
  57                                 throw new ArgumentNullException("filename is null");
  58                         }
  59
  60                         Reader = new ResourceReader (fileName);
  61                 }
  62
  63                 public virtual void Close ()
  64                 {
  65                         Dispose (true);
  66                 }
  67
  68                 public void Dispose()
  69                 {
  70                         Dispose (true);
  71                 }
  72
  73                 protected virtual void Dispose (bool disposing)
  74                 {
  75                         if (disposing) {
  76                                 if(Reader!=null) {
  77                                         Reader.Close();
  78                                 }
  79                         }
  80
  81                         Reader = null;
  82                         Table = null;
  83                 }
  84
  85                 public virtual Type GetDefaultReader ()
  86                 {
  87                         return (typeof (ResourceReader));
  88                 }
  89                 public virtual Type GetDefaultWriter ()
  90                 {
  91                         return (typeof (ResourceWriter));
  92                 }
  93
  94 #if (NET_1_1)
  95
  96                 [ComVisible (false)]
  97                 public virtual IDictionaryEnumerator GetEnumerator ()
  98                 {
  99                         if (Table == null)
 100                                 ReadResources ();
 101                         return Table.GetEnumerator();
 102                 }
 103
 104                 IEnumerator IEnumerable.GetEnumerator ()
 105                 {
 106                         return this.GetEnumerator ();
 107                 }
 108
 109 #endif
 110
 111                 public virtual object GetObject (string name)
 112                 {
 113                         if (name == null)
 114                                 throw new ArgumentNullException ("The name parameter is null.");
 115                         if (Reader == null)
 116                                 throw new InvalidOperationException ("The ResourceSet has been closed.");
 117
 118                         if (Table == null) {
 119                                 ReadResources ();
 120                         }
 121
 122                         return(Table[name]);
 123                 }
 124
 125                 public virtual object GetObject (string name, bool ignoreCase)
 126                 {
 127                         if (name == null)
 128                                 throw new ArgumentNullException ("The name parameter is null.");
 129                         if (Reader == null)
 130                                 throw new InvalidOperationException ("ResourceSet has been closed.");
 131                         if (Table == null)
 132                                 ReadResources ();
 133
 134                         if (ignoreCase) {
 135                                 foreach (DictionaryEntry de in Table) {
 136                                         string key = (string) de.Key;
 137                                         if (String.Compare (key, name, true, CultureInfo.InvariantCulture) == 0)
 138                                                 return de.Value;
 139                                 }
 140                                 return null;
 141                         } else
 142                                 return Table[name];
 143                 }
 144
 145                 public virtual string GetString (string name)
 146                 {
 147                         Object o = GetObject (name);
 148                         if (o == null)
 149                                 return null;
 150                         if (o is string)
 151                                 return (string) o;
 152                         throw new InvalidOperationException("Not a string");
 153                 }
 154
 155                 public virtual string GetString (string name, bool ignoreCase)
 156                 {
 157                         Object o = GetObject (name, ignoreCase);
 158                         if (o == null)
 159                                 return null;
 160                         if (o is string)
 161                                 return (string) o;
 162                         throw new InvalidOperationException("Not a string");
 163                 }
 164
 165                 protected virtual void ReadResources ()
 166                 {
 167                         IDictionaryEnumerator i = Reader.GetEnumerator();
 168
 169                         if (Table == null)
 170                                 Table = new Hashtable ();
 171                         i.Reset ();
 172
 173                         while (i.MoveNext ())
 174                                 Table.Add (i.Key, i.Value);
 175                 }
 176         }
 177 }